diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..3550a30
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..4e74cb8
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,15 @@
+# Python
+*.pyc
+*.pyo
+build/
+dist/
+.venv
+__pycache__
+
+# Nix
+result
+result-*
+
+# Ignore generated files by default
+/mapcrafter
+/bluemap
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..8a9fbb6
--- /dev/null
+++ b/README.md
@@ -0,0 +1,112 @@
+# minecraft-kartverket
+
+Map markers for PVV's minecraft server
+
+## What is this?
+
+This project is meant to let PVV members contribute map data for PVV's minecraft server, like coordinates for bases, cities, and other points of interest.
+These markers are written in python so that we can do things like generating points in a loop, calculating distances, and other types of automation.
+
+There is also a cli tool that we use to export these points into the formats of several minecraft map implementations.
+
+## Marker sets
+
+Here is an overview of the different marker sets, and what they are meant for.
+
+- **Overworld**
+  - Area Names: larger areas with names
+  - Buildings: important buildings and world wonders.
+  - Cities: an area that consist of several bases and/or public infrastructure.
+  - Homes: single bases consisting of 1-3 people.
+  - Huts: small huts, meant for visitors and travelers.
+  - Infrastructure: public infrastructure, like bridges, ports, tunnels, etc.
+  - Mines: public mines
+  - Nature: similar to "Area Names", but specifically for mostly untouched nature-named areas.
+  - Other: anything that doesn't fit into the other categories
+  - Railways: railways
+  - Roads: roads
+  - Villages: villages generated by minecraft (as opposed to player made cities)
+
+- **Nether**
+  - Ice Tracks: ice tracks meant for boats.
+  - Other: anything that doesn't fit into the other categories
+  - Portals: named portals that lead back to the overworld.
+  - Railways: railways
+
+- **The End**
+  - Other: anything that doesn't fit into the other categories
+  - Portals: end portals that send you back to the center of the map
+
+## How to add a point marker
+
+1. Find the correct marker set file in `src/marker_sets/<world>`.
+2. Add the marker to the list in the file. You can look at neighbouring markers for inspiration.
+3. Run the cli tool to verify that the marker has been added correctly.
+
+```bash
+uv run mckart verify
+uv run mckart print
+```
+
+4. Open a PR
+
+## How to add a railway / road
+
+This is very similar to adding a point marker, but the content of the marker is different.
+
+You can follow the previous guide, but for step 3, use this template or look at other markers for inspiration.
+
+```python
+from lib_marker import Track
+
+MARKERS = [
+    ...,
+    Track(
+        name="Nordbanen",
+        points = [
+            (848, 70, 1583),
+            (920, 70, 1583),
+            (920, 70, 1200),
+            ...
+        ],
+    ),
+    ...,
+]
+```
+
+## How to add a new marker set
+
+To add a new marker set, you need to:
+
+1. Create a new  file the other marker sets in `src/marker_sets/<world>`.
+2. Create a marker set in this file, using this template:
+
+```python
+from lib_marker.marker_set import MarkerSet
+
+MARKER_SET = MarkerSet(
+    name="My Marker Set",
+    markers=[
+    ],
+)
+```
+
+3. Add the marker set to the `MARKER_SETS` list in `src/marker_sets/<world>/__init__.py`.
+
+```python
+from .<marker_set_name> import MARKER_SET as <marker_set_name>_marker_set
+
+MARKER_SETS = [
+    ...
+    portals_marker_set,
+]
+```
+
+See the other marker sets for inspiration.
+
+4. Add the marker set with a description to this README file.
+
+## See also
+
+- [BlueMap documentation for markers](https://bluemap.bluecolored.de/wiki/customization/Markers.html)
+- [Mapcrafter documentation for markers](https://mapcrafter.readthedocs.io/en/latest/markers.html)
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..4e45c8a
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1762482733,
+        "narHash": "sha256-g/da4FzvckvbiZT075Sb1/YDNDr+tGQgh4N8i5ceYMg=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "e1ebeec86b771e9d387dd02d82ffdc77ac753abc",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
index e7784aa..ca8ee8b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,7 +1,122 @@
 {
-  inputs = { };
-  outputs = inputs@{ self, ...}: {
-    map-markers = import ./map-markers;
-    map-lib = import ./map-markers/lib.nix;
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+
+  outputs = { self, nixpkgs }: let
+    systems = [
+      "x86_64-linux"
+      "aarch64-linux"
+      "x86_64-darwin"
+      "aarch64-darwin"
+    ];
+
+    forAllSystems = f: nixpkgs.lib.genAttrs systems (system: let
+      pkgs = nixpkgs.legacyPackages.${system};
+    in f system pkgs);
+
+    inherit (nixpkgs) lib;
+
+  in {
+    apps = forAllSystems (system: pkgs: {
+      default = {
+        type = "app";
+        program = lib.getExe self.packages.${system}.default;
+        meta.description = "The 'mckart' cli tool with all map data embedded";
+      };
+    });
+
+    devShells = forAllSystems (_: pkgs: {
+      default = pkgs.mkShell {
+        packages = with pkgs; [
+          uv
+          ruff
+          python3
+          # (python3.withPackages (ps: with ps; []))
+          biome
+        ];
+      };
+    });
+
+    overlays.default = final: prev: self.packages.${final.system};
+
+    checks = forAllSystems (system: pkgs: {
+      inherit (self.packages.${system}) bluemap-export mapcrafter-export;
+
+      hocon-include = let
+        format = pkgs.formats.hocon { };
+      in format.generate "minecraft-kartverket-test-hocon-include" {
+        _includes = [
+          (format.lib.mkInclude "${self.packages.${system}.bluemap-export}/overworld.hocon")
+          (format.lib.mkInclude "${self.packages.${system}.bluemap-export}/nether.hocon")
+          (format.lib.mkInclude "${self.packages.${system}.bluemap-export}/the-end.hocon")
+        ];
+      };
+    });
+
+    packages = forAllSystems (system: pkgs: {
+      default = self.packages.${system}.mckart;
+
+      mckart = let
+        pyproject = builtins.fromTOML (builtins.readFile ./pyproject.toml);
+      in with pkgs.python3Packages; buildPythonPackage {
+        pname = pyproject.project.name;
+        version = pyproject.project.version;
+        src = lib.cleanSource ./.;
+
+        format = "pyproject";
+
+        build-system = [ hatchling ];
+        dependencies = [];
+
+        meta.mainProgram = "mckart";
+      };
+
+      bluemap-export = let
+        # from pkgs/pkgs-lib/formats/hocon/default.nix
+        hocon-validator =
+          pkgs.writers.writePython3Bin "hocon-validator"
+            {
+              libraries = [ pkgs.python3Packages.pyhocon ];
+            }
+            ''
+              from sys import argv
+              from pyhocon import ConfigFactory
+
+              if not len(argv) == 2:
+                  print("USAGE: hocon-validator <file>")
+
+              ConfigFactory.parse_file(argv[1])
+            '';
+      in pkgs.runCommand "bluemap-export" {
+        nativeBuildInputs = [
+          (self.packages.${system}.mckart)
+          hocon-validator
+        ];
+      } ''
+        mckart export-bluemap --output-dir "$out"
+
+        for file in "$out"/*.hocon; do
+          hocon-validator "$file"
+        done
+      '';
+
+      mapcrafter-export = pkgs.runCommand "mapcrafter-export" {
+        buildInputs = [
+          (self.packages.${system}.mckart)
+          pkgs.biome
+        ];
+
+        biomeConf = builtins.toJSON {
+          formatter = {
+            indentStyle = "space";
+            lineWidth = 100;
+          };
+        };
+        passAsFile = [ "biomeConf" ];
+      } ''
+        mckart export-mapcrafter --output-dir "$out"
+        cp "$biomeConfPath" ./biome.json
+        biome format --config-path=./biome.json "$out"/* --write
+      '';
+    });
   };
 }
diff --git a/icons/.gitkeep b/icons/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/map-markers/default.nix b/map-markers/default.nix
deleted file mode 100644
index 180d065..0000000
--- a/map-markers/default.nix
+++ /dev/null
@@ -1,6 +0,0 @@
-let
-  lib = import ./lib.nix;
-  icons = import ./icons;
-in {
-  vanillaSurvival = import ./vanillaSurvival { inherit lib icons; };
-}
diff --git a/map-markers/lib.nix b/map-markers/lib.nix
deleted file mode 100644
index c6dd773..0000000
--- a/map-markers/lib.nix
+++ /dev/null
@@ -1,11 +0,0 @@
-rec {
-  mkPoi = label: pos: attr: {
-    type = "poi";
-    position = {
-      x = builtins.elemAt pos 0;
-      y = builtins.elemAt pos 2;
-      z = builtins.elemAt pos 1;
-    };
-    label = label;
-  } // attr;
-}
diff --git a/map-markers/mapcrafter/markers.js b/map-markers/mapcrafter/markers.js
deleted file mode 100644
index a5d4e39..0000000
--- a/map-markers/mapcrafter/markers.js
+++ /dev/null
@@ -1,380 +0,0 @@
-var MAPCRAFTER_MARKERS = [
-	{
-		"id" : "byer",
-		"name" : "Byer og steder",
-		"showDefault" : true,
-		"markers" : {
-			"verden" : [
-			       // Sorter markoerene etter lengdegrad.
-				{
-					"pos" : [-2204, 447, 64],
-					"title" : "Vestlandet",
-				},
-				{
-					"pos" : [-1818, 98, 64],
-					"title" : "Vestsumpland",
-				},
-				{
-					"pos" : [-1760, -2440, 64],
-					"title" : "Smedby",
-				},
-				{
-					"pos" : [-1654, -654, 64],
-					"title" : "Snøklippan",
-				},
-				{
-					"pos" : [-1563, -1966, 64],
-					"title" : "Dypskiferhytta",
-				},
-				{
-					"pos" : [-1189, 1556, 75],
-					"title" : "England",
-				},
-				{
-					"pos" : [-980, 4090, 64],
-					"title" : "Hemmelig mesabiom",
-				},
-				{
-				       "pos" : [-800, 0, 64],
-				       "title" : "Vestisødet",
-				},
-				{
-					"pos" : [-378, 153, 64],
-					"title" : "Isjungelkatedralen",
-				},
-				{
-					"pos" : [-370, 2390, 64],
-					"title" : "Svartskoghavn",
-				},
-				{
-					"pos" : [-334, 473, 116],
-					"title" : "Kystbasen",
-				},
-				{
-					"pos" : [-305, 535, 64],
-					"title" : "Langstrand",
-				},
-				{
-					"pos" : [-220, 2890, 64],
-					"title" : "Summefjord",
-				},
-				{
-					"pos" : [-206, -35, 64],
-					"title" : "Slimegruva",
-				},
-				{
-					"pos" : [-160, 1480, 64],
-					"title" : "Turrikkelmyra",
-				},
-				{
-					"pos" : [-128, -1460, 64],
-					"title" : "Akasienborg",
-				},
-				{
-					"pos" : [-110, 3465, 64],
-					"title" : "Summevatn",
-				},
-				{
-					"pos" : [-99, 1025, 99],
-					"title" : "Tegltårnet",
-				},
-				{
-					"pos" : [-54, 234, 64],
-					"title" : "Huløyeid",
-				},
-				{
-					"pos" : [-47, 146, 64],
-					"title" : "Trangdalen",
-				},
-				{
-					"pos" : [-22, 67, 76],
-					"title" : "Tårnodden",
-				},
-				{
-					"pos" : [0, -485, 67],
-					"title" : "Nordørkenen",
-				},
-				{
-					"pos" : [4, 800, 64],
-					"title" : "Naturreservat",
-				},
-				{
-					"pos" : [56, -266, 67],
-					"title" : "Sandsteingruva",
-				},
-				{
-					"pos" : [58, -2860, 63],
-					"title" : "Tangen",
-				},
-				{
-					"pos" : [77, -348, 69],
-					"title" : "Smalelvbro",
-				},
-				{
-					"pos" : [100, -3830, 64],
-					"title" : "Ittoqqortoormiit",
-				},
-				{
-					"pos" : [102, 37, 77],
-					"title" : "Bjerkepalasset",
-				},
-				{
-					"pos" : [150, 80, 64],
-					"title" : "Piratbukta",
-				},
-				{
-					"pos" : [177, 177, 64],
-					"title" : "Heimfjell",
-				},
-				{
-					"pos" : [240, 3070, 64],
-					"title" : "Hulevatna",
-				},
-				{
-					"pos" : [267, -496, 89],
-					"title" : "Hodeskallegrotten",
-				},
-				{
-					"pos" : [280, -2800, 64],
-					"title" : "Jesus Christ Superstore",
-				},
-				{
-					"pos" : [337, -853, 64],
-					"title" : "NPC-landsby nord",
-				},
-				{
-					"pos" : [360, -460, 64],
-					"title" : "Vikingelandsbyen",
-				},
-				{
-				       "pos" : [473, -3043, 78],
-				       "title" : "Bjørnebukten",
-				},
-				{
-				       "pos" : [512, -3320, 64],
-				       "title" : "Leirhavn",
-				},
-				{
-				       "pos" : [550, -1480, 64],
-				       "title" : "Grensebuelvbu",
-				},
-				{
-					"pos" : [675, 362, 64],
-					"title" : "Storvatnet",
-				},
-				{
-					"pos" : [695, 2812, 64],
-					"title" : "Kløfteby",
-				},
-				{
-					"pos" : [723, -2380, 64],
-					"title" : "Isbjørnby",
-				},
-				{
-					"pos" : [730, -1900, 64],
-					"title" : "Lille isbjørnelv",
-				},
-				{
-				       "pos" : [800, -3300, 64],
-				       "title" : "Gammelleirnes",
-				},
-				{
-				       "pos" : [834, -3089, 65],
-				       "title" : "Biosfæren",
-				},
-				{
-					"pos" : [848, 1583, 70],
-					"title" : "Nyverdenhytta",
-				},
-				{
-					"pos" : [850, -2130, 64],
-					"title" : "Store isbjørnelv",
-				},
-				{
-					"pos" : [874, 160, 65],
-					"title" : "Blindodden",
-				},
-				{
-					"pos" : [910, 3050, 64],
-					"title" : "Ulveelva",
-				},
-				{
-					"pos" : [960, 460, 64],
-					"title" : "Tosjødalen",
-				},
-				{
-					"pos" : [1005, 1335, 64],
-					"title" : "Storhavskanalen",
-				},
-				{
-					"pos" : [1278, -397, 64],
-					"title" : "NPC-landsby",
-				},
-				{
-					"pos" : [1570, 3285, 64],
-					"title" : "SuperTheodors fiskehus",
-				},
-				{
-					"pos" : [1810, -1630, 64],
-					"title" : "Lamafjellet",
-				},
-				{
-					"pos" : [2111, 3777, 64],
-					"title" : "SuperTheodors strand",
-				},
-				{
-					"pos" : [2300, 250, 64],
-					"title" : "Andøya",
-				},
-				{
-					"pos" : [2350, -136, 64],
-					"title" : "Grantrebukta",
-				},
-				{
-					"pos" : [2734, -984, 64],
-					"title" : "Hestelandsby",
-				},
-				{
-					"pos" : [2950, 270, 64],
-					"title" : "Bikkjeby",
-				},
-				{
-					"pos" : [3000, 1000, 64],
-					"title" : "Storhavet i øst",
-				},
-				{
-					"pos" : [3085, 424, 64],
-					"title" : "Fyret",
-				},
-				{
-					"pos" : [3481, 210, 75],
-					"title" : "Vinterstranda hotel & resort",
-				},
-				{
-					"pos" : [4468, 1337, 64],
-					"title" : "Holmgard",
-				},
-				{
-					"pos" : [4630, 270, 64],
-					"title" : "Der Kölner Dom",
-				},
-				{
-					"pos" : [5470, -270, 64],
-					"title" : "Storsnøfjella",
-				},
-				{
-					"pos" : [6200, -300, 64],
-					"title" : "Bondeby",
-				},
-				{
-					"pos" : [6880, -465, 64],
-					"title" : "Kirkemyr",
-				},
-			],
-			"underverden" : [
-			       // Sorter markoerene etter lengdegrad.
-				{
-					"pos" : [-900, 27, 64],
-					"title" : "Grisebukta",
-				},
-				{
-					"pos" : [-120, 510, 64],
-					"title" : "Hemmelig mesabiom, ca.",
-				},
-				{
-					"pos" : [120, -420, 64],
-					"title" : "Biosfæren, ca.",
-				},
-				{
-					"pos" : [520, 220, 64],
-					"title" : "Holmgard, ca.",
-				},
-			],
-		},
-	},
-	{
-		"id" : "spesial",
-		"name" : "Spesielle steder",
-		"showDefault" : true,
-		"icon" : "marker-icon-green.png",
-	      	"iconSize" : [25, 41],
-		"markers" : {
-			"verden" : [
-				{
-					"pos" : [0, 0, 64],
-					"title" : "Nullpunkt",
-				},
-			],
-			"underverden" : [
-				{
-					"pos" : [0, 0, 64],
-					"title" : "Nullpunkt",
-				},
-			],
-		},
-	},
-	{
-	   //
-	   // Tegner et rutenett som viser regiongrensene, og
-	   // koordinatene for hver region.
-	   //
-		"id" : "regioner",
-		"name" : "Regioner",
-		"showDefault" : false,
-		"createMarker" : function(ui, groupInfo, markerInfo) {
-		       var rmax = 15;
-		       var objekter = [];
-
-		       var multilatlngs = [];
-
-		       for (var rx = -rmax; rx < rmax; rx++) {
-			   var latlngs = [];
-			   var miny = -rmax*512;
-			   var maxy = rmax*512;
-			   var x = rx*512;
-			   // use the ui.mcToLatLng-function to convert Minecraft coords to LatLngs
-			   latlngs.push(ui.mcToLatLng(x, miny, 64));
-			   latlngs.push(ui.mcToLatLng(x, maxy, 64));
-			   multilatlngs.push(latlngs);
-			}
-
-		       for (var ry = -rmax; ry < rmax; ry++) {
-			   var latlngs = [];
-			   var minx = -rmax*512;
-			   var maxx = rmax*512;
-			   var y = ry*512;
-			   // use the ui.mcToLatLng-function to convert Minecraft coords to LatLngs
-			   latlngs.push(ui.mcToLatLng(minx, y, 64));
-			   latlngs.push(ui.mcToLatLng(maxx, y, 64));
-			   multilatlngs.push(latlngs);
-			}
-
-		       for (var rx = -rmax; rx < rmax; rx++) {
-		           for (var ry = -rmax; ry < rmax; ry++) {
-				var x = rx*512 + 256;
-				var y = ry*512 + 256;
-
-				var myIcon = L.divIcon({iconSize: L.point(55, 20), html: "<center>r." + String(rx) + "." + String(ry) + "</center>"});
-				var myMarker = L.marker(ui.mcToLatLng(x, y, 64), {icon: myIcon});
-				objekter.push(myMarker);
-			   }
-			}
-
-		   var linjer = [];
-		       if (L.version.startsWith("0.7.")) {
-		           linjer = L.multiPolyline(multilatlngs, {"color" : markerInfo.color});
-			} else {
-		           linjer = L.polyline(multilatlngs, {"color" : markerInfo.color});
-			}
-		       objekter.push(linjer);
-			return L.layerGroup(objekter);
-		},
-		"markers" : {
-			"verden" : [
-				{
-					"color" : "yellow",
-				},
-			],
-		},
-	},
-];
diff --git a/map-markers/vanillaSurvival/default.nix b/map-markers/vanillaSurvival/default.nix
deleted file mode 100644
index 78836f0..0000000
--- a/map-markers/vanillaSurvival/default.nix
+++ /dev/null
@@ -1,7 +0,0 @@
-{ lib, icons, ... }:
-
-{
-  verden = import ./verden { inherit lib icons; };
-  underverden = import ./underverden { inherit lib icons; };
-  # enden = import ./enden { inherit lib icons; };
-}
diff --git a/map-markers/vanillaSurvival/underverden/byer.nix b/map-markers/vanillaSurvival/underverden/byer.nix
deleted file mode 100644
index d8239b0..0000000
--- a/map-markers/vanillaSurvival/underverden/byer.nix
+++ /dev/null
@@ -1,8 +0,0 @@
-{ lib, icons }:
-
-{
-  "Grisebukta" = lib.mkPoi "Grisebukta" [(-900) (27) (64)] { };
-  "Hemmelig mesabiom, ca." = lib.mkPoi "Hemmelig mesabiom, ca." [(-120) (510) (64)] { };
-  "Biosfæren, ca." = lib.mkPoi "Biosfæren, ca." [(120) (-420) (64)] { };
-  "Holmgard, ca." = lib.mkPoi "Holmgard, ca." [(520) (220) (64)] { };
-}
diff --git a/map-markers/vanillaSurvival/underverden/default.nix b/map-markers/vanillaSurvival/underverden/default.nix
deleted file mode 100644
index 78a934f..0000000
--- a/map-markers/vanillaSurvival/underverden/default.nix
+++ /dev/null
@@ -1,6 +0,0 @@
-{ lib, icons }:
-
-{
-  byer = import ./byer.nix { inherit lib icons; };
-  spesial = import ./spesial.nix { inherit lib icons; };
-}
diff --git a/map-markers/vanillaSurvival/underverden/spesial.nix b/map-markers/vanillaSurvival/underverden/spesial.nix
deleted file mode 100644
index 78d086c..0000000
--- a/map-markers/vanillaSurvival/underverden/spesial.nix
+++ /dev/null
@@ -1,12 +0,0 @@
-{ lib, icons }:
-
-{
-  label = "Spesielle steder";
-  toggleable = true;
-  default-hidden = false;
-  sorting = 100;
-
-  markers = {
-    nullpunkt = lib.mkPoi "Nullpunkt" [0 0 64] { /*icon = icons.green*/ };
-  };
-}
diff --git a/map-markers/vanillaSurvival/verden/byer.nix b/map-markers/vanillaSurvival/verden/byer.nix
deleted file mode 100644
index ca5c0ec..0000000
--- a/map-markers/vanillaSurvival/verden/byer.nix
+++ /dev/null
@@ -1,76 +0,0 @@
-{ lib, ... }:
-
-{
-  label = "Byer og steder";
-  toggleable = true;
-  default-hidden = false;
-  sorting = 0;
-  markers = {
-    "Vestlandet" = lib.mkPoi "Vestlandet" [(-2204) (447) (64)] { };
-    "Vestsumpland" = lib.mkPoi "Vestsumpland" [(-1818) (98) (64)] { };
-    "Smedby" = lib.mkPoi "Smedby" [(-1760) (-2440) (64)] { };
-    "Snøklippan" = lib.mkPoi "Snøklippan" [(-1654) (-654) (64)] { };
-    "Dypskiferhytta" = lib.mkPoi "Dypskiferhytta" [(-1563) (-1966) (64)] { };
-    "England" = lib.mkPoi "England" [(-1189) (1556) (75)] { };
-    "Hemmelig mesabiom" = lib.mkPoi "Hemmelig mesabiom" [(-980) (4090) (64)] { };
-    "Vestisødet" = lib.mkPoi "Vestisødet" [(-800) (0) (64)] { };
-    "Isjungelkatedralen" = lib.mkPoi "Isjungelkatedralen" [(-378) (153) (64)] { };
-    "Svartskoghavn" = lib.mkPoi "Svartskoghavn" [(-370) (2390) (64)] { };
-    "Kystbasen" = lib.mkPoi "Kystbasen" [(-334) (473) (116)] { };
-    "Langstrand" = lib.mkPoi "Langstrand" [(-305) (535) (64)] { };
-    "Summefjord" = lib.mkPoi "Summefjord" [(-220) (2890) (64)] { };
-    "Slimegruva" = lib.mkPoi "Slimegruva" [(-206) (-35) (64)] { };
-    "Turrikkelmyra" = lib.mkPoi "Turrikkelmyra" [(-160) (1480) (64)] { };
-    "Akasienborg" = lib.mkPoi "Akasienborg" [(-128) (-1460) (64)] { };
-    "Summevatn" = lib.mkPoi "Summevatn" [(-110) (3465) (64)] { };
-    "Tegltårnet" = lib.mkPoi "Tegltårnet" [(-99) (1025) (99)] { };
-    "Huløyeid" = lib.mkPoi "Huløyeid" [(-54) (234) (64)] { };
-    "Trangdalen" = lib.mkPoi "Trangdalen" [(-47) (146) (64)] { };
-    "Tårnodden" = lib.mkPoi "Tårnodden" [(-22) (67) (76)] { };
-    "Nordørkenen" = lib.mkPoi "Nordørkenen" [(0) (-485) (67)] { };
-    "Naturreservat" = lib.mkPoi "Naturreservat" [(4) (800) (64)] { };
-    "Sandsteingruva" = lib.mkPoi "Sandsteingruva" [(56) (-266) (67)] { };
-    "Tangen" = lib.mkPoi "Tangen" [(58) (-2860) (63)] { };
-    "Smalelvbro" = lib.mkPoi "Smalelvbro" [(77) (-348) (69)] { };
-    "Ittoqqortoormiit" = lib.mkPoi "Ittoqqortoormiit" [(100) (-3830) (64)] { };
-    "Bjerkepalasset" = lib.mkPoi "Bjerkepalasset" [(102) (37) (77)] { };
-    "Piratbukta" = lib.mkPoi "Piratbukta" [(150) (80) (64)] { };
-    "Heimfjell" = lib.mkPoi "Heimfjell" [(177) (177) (64)] { };
-    "Hulevatna" = lib.mkPoi "Hulevatna" [(240) (3070) (64)] { };
-    "Hodeskallegrotten" = lib.mkPoi "Hodeskallegrotten" [(267) (-496) (89)] { };
-    "Jesus Christ Superstore" = lib.mkPoi "Jesus Christ Superstore" [(280) (-2800) (64)] { };
-    "NPC-landsby nord" = lib.mkPoi "NPC-landsby nord" [(337) (-853) (64)] { };
-    "Vikingelandsbyen" = lib.mkPoi "Vikingelandsbyen" [(360) (-460) (64)] { };
-    "Bjørnebukten" = lib.mkPoi "Bjørnebukten" [(473) (-3043) (78)] { };
-    "Leirhavn" = lib.mkPoi "Leirhavn" [(512) (-3320) (64)] { };
-    "Grensebuelvbu" = lib.mkPoi "Grensebuelvbu" [(550) (-1480) (64)] { };
-    "Storvatnet" = lib.mkPoi "Storvatnet" [(675) (362) (64)] { };
-    "Kløfteby" = lib.mkPoi "Kløfteby" [(695) (2812) (64)] { };
-    "Isbjørnby" = lib.mkPoi "Isbjørnby" [(723) (-2380) (64)] { };
-    "Lille isbjørnelv" = lib.mkPoi "Lille isbjørnelv" [(730) (-1900) (64)] { };
-    "Gammelleirnes" = lib.mkPoi "Gammelleirnes" [(800) (-3300) (64)] { };
-    "Biosfæren" = lib.mkPoi "Biosfæren" [(834) (-3089) (65)] { };
-    "Nyverdenhytta" = lib.mkPoi "Nyverdenhytta" [(848) (1583) (70)] { };
-    "Store isbjørnelv" = lib.mkPoi "Store isbjørnelv" [(850) (-2130) (64)] { };
-    "Blindodden" = lib.mkPoi "Blindodden" [(874) (160) (65)] { };
-    "Ulveelva" = lib.mkPoi "Ulveelva" [(910) (3050) (64)] { };
-    "Tosjødalen" = lib.mkPoi "Tosjødalen" [(960) (460) (64)] { };
-    "Storhavskanalen" = lib.mkPoi "Storhavskanalen" [(1005) (1335) (64)] { };
-    "NPC-landsby" = lib.mkPoi "NPC-landsby" [(1278) (-397) (64)] { };
-    "SuperTheodors fiskehus" = lib.mkPoi "SuperTheodors fiskehus" [(1570) (3285) (64)] { };
-    "Lamafjellet" = lib.mkPoi "Lamafjellet" [(1810) (-1630) (64)] { };
-    "SuperTheodors strand" = lib.mkPoi "SuperTheodors strand" [(2111) (3777) (64)] { };
-    "Andøya" = lib.mkPoi "Andøya" [(2300) (250) (64)] { };
-    "Grantrebukta" = lib.mkPoi "Grantrebukta" [(2350) (-136) (64)] { };
-    "Hestelandsby" = lib.mkPoi "Hestelandsby" [(2734) (-984) (64)] { };
-    "Bikkjeby" = lib.mkPoi "Bikkjeby" [(2950) (270) (64)] { };
-    "Storhavet i øst" = lib.mkPoi "Storhavet i øst" [(3000) (1000) (64)] { };
-    "Fyret" = lib.mkPoi "Fyret" [(3085) (424) (64)] { };
-    "Vinterstranda hotel & resort" = lib.mkPoi "Vinterstranda hotel & resort" [(3481) (210) (75)] { };
-    "Holmgard" = lib.mkPoi "Holmgard" [(4468) (1337) (64)] { };
-    "Der Kölner Dom" = lib.mkPoi "Der Kölner Dom" [(4630) (270) (64)] { };
-    "Storsnøfjella" = lib.mkPoi "Storsnøfjella" [(5470) (-270) (64)] { };
-    "Bondeby" = lib.mkPoi "Bondeby" [(6200) (-300) (64)] { };
-    "Kirkemyr" = lib.mkPoi "Kirkemyr" [(6880) (-465) (64)] { };
-  };
-}
diff --git a/map-markers/vanillaSurvival/verden/default.nix b/map-markers/vanillaSurvival/verden/default.nix
deleted file mode 100644
index 78a934f..0000000
--- a/map-markers/vanillaSurvival/verden/default.nix
+++ /dev/null
@@ -1,6 +0,0 @@
-{ lib, icons }:
-
-{
-  byer = import ./byer.nix { inherit lib icons; };
-  spesial = import ./spesial.nix { inherit lib icons; };
-}
diff --git a/map-markers/vanillaSurvival/verden/spesial.nix b/map-markers/vanillaSurvival/verden/spesial.nix
deleted file mode 100644
index 78d086c..0000000
--- a/map-markers/vanillaSurvival/verden/spesial.nix
+++ /dev/null
@@ -1,12 +0,0 @@
-{ lib, icons }:
-
-{
-  label = "Spesielle steder";
-  toggleable = true;
-  default-hidden = false;
-  sorting = 100;
-
-  markers = {
-    nullpunkt = lib.mkPoi "Nullpunkt" [0 0 64] { /*icon = icons.green*/ };
-  };
-}
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..c0c4c05
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,26 @@
+[project]
+name = "minecraft-kartverket"
+version = "0.1.0"
+description = "Map data for our favourite minecraft server"
+readme = "README.md"
+authors = [
+    { name = "pvv", email = "projects@pvv.ntnu.no" }
+]
+requires-python = ">=3.12"
+dependencies = []
+
+[project.scripts]
+mckart = "cli.main:main"
+
+[tool.hatch.build.targets.wheel]
+packages = [
+  "src/cli",
+  "src/lib_marker",
+  "src/bluemap_exporter",
+  "src/mapcrafter_exporter",
+  "src/marker_sets",
+]
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
diff --git a/src/bluemap_exporter/__init__.py b/src/bluemap_exporter/__init__.py
new file mode 100644
index 0000000..c64c5ad
--- /dev/null
+++ b/src/bluemap_exporter/__init__.py
@@ -0,0 +1,3 @@
+from .exporter import generate_bluemap_output
+
+__all__ = ["generate_bluemap_output"]
diff --git a/src/bluemap_exporter/exporter.py b/src/bluemap_exporter/exporter.py
new file mode 100644
index 0000000..e4dca80
--- /dev/null
+++ b/src/bluemap_exporter/exporter.py
@@ -0,0 +1,80 @@
+import json
+from textwrap import indent
+from typing import Any
+from pathlib import Path
+
+from marker_sets import WORLDS
+from lib_marker import Point
+
+
+def generate_bluemap_output(output_dir: Path):
+    output_dir.mkdir(parents=True, exist_ok=True)
+
+    data = convert_data_to_bluemap_structure()
+
+    for world_name, marker_sets in data.items():
+        with open(output_dir / f"{slug(world_name)}.hocon", "w") as f:
+            f.write(to_hocon(marker_sets))
+
+
+def slug(s: str) -> str:
+    return (
+        s.lower()
+        .replace(" ", "-")
+        .replace("ø", "o")
+        .replace("æ", "ae")
+        .replace("å", "a")
+    )
+
+
+def convert_data_to_bluemap_structure() -> dict:
+    result = {}
+
+    for world_name, marker_sets in WORLDS.items():
+        result[world_name] = {}
+
+        for marker_set in marker_sets:
+            result[world_name][slug(marker_set.name)] = {
+                "label": marker_set.name,
+                "toggleable": True,
+                "default-hidden": not marker_set.show_by_default,
+                "markers": {},
+            }
+
+            for marker in marker_set.markers:
+                if isinstance(marker, Point):
+                    result[world_name][slug(marker_set.name)][slug(marker.name)] = {
+                        "type": "poi",
+                        "label": marker.name,
+                        "position": {
+                            "x": marker.x,
+                            "y": marker.y,
+                            "z": marker.z,
+                        },
+                    }
+                else:
+                    raise NotImplementedError(f"Unknown marker type: {marker}")
+
+    return result
+
+
+def to_hocon(x: Any) -> str:
+    if isinstance(x, str):
+        return json.dumps(x, ensure_ascii=False)
+    elif isinstance(x, int):
+        return str(x)
+    elif isinstance(x, float):
+        return str(x)
+    elif isinstance(x, bool):
+        return str(x).lower()
+    elif isinstance(x, list):
+        items = [indent(to_hocon(y), "  ") for y in x]
+        return f"[\n{'\n'.join(items)}\n]"
+    elif isinstance(x, dict):
+        items = [
+            f'  "{k}": {indent(to_hocon(v), '  ').removeprefix('  ')}'
+            for k, v in x.items()
+        ]
+        return f"{{\n{'\n'.join(items)}\n}}"
+    else:
+        raise ValueError(f"Unknown type: {x}")
diff --git a/src/cli/__init__.py b/src/cli/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/cli/main.py b/src/cli/main.py
new file mode 100644
index 0000000..70f0ab5
--- /dev/null
+++ b/src/cli/main.py
@@ -0,0 +1,65 @@
+import argparse
+from pathlib import Path
+
+from .print import pretty_print_marker_data
+from .validate import validate_marker_data
+
+from mapcrafter_exporter import generate_mapcrafter_output
+from bluemap_exporter import generate_bluemap_output
+
+
+def parse_args():
+    parser = argparse.ArgumentParser(description="Minecraft map data exporter cli")
+
+    subparsers = parser.add_subparsers(dest="command")
+
+    ebh_parser = subparsers.add_parser(
+        "export-bluemap", help="Export map data to Bluemap format"
+    )
+    ebh_parser.add_argument(
+        "--output-dir",
+        help="Output dir",
+        type=Path,
+        metavar="DIR",
+        default=Path("bluemap"),
+    )
+
+    emj_parser = subparsers.add_parser(
+        "export-mapcrafter", help="Export map data to Mapcrafter format"
+    )
+    emj_parser.add_argument(
+        "--output-dir",
+        help="Output dir",
+        type=Path,
+        metavar="DIR",
+        default=Path("mapcrafter"),
+    )
+
+    subparsers.add_parser("validate", help="Validate the map data")
+    subparsers.add_parser("print", help="Print the map data")
+
+    return parser.parse_args()
+
+
+def main():
+    args = parse_args()
+
+    match args.command:
+        case "export-bluemap":
+            generate_bluemap_output(args.output_dir)
+
+        case "export-mapcrafter":
+            generate_mapcrafter_output(args.output_dir)
+
+        case "validate":
+            validate_marker_data()
+
+        case "print":
+            pretty_print_marker_data()
+
+        case _:
+            print("Unknown command")
+
+
+if __name__ == "__main__":
+    main()
diff --git a/src/cli/print.py b/src/cli/print.py
new file mode 100644
index 0000000..45fdfb4
--- /dev/null
+++ b/src/cli/print.py
@@ -0,0 +1,55 @@
+from lib_marker import MarkerSet, Marker, Point, Track, Area
+from marker_sets import WORLDS
+
+
+def pretty_print_marker_data() -> None:
+    tree = format_tree(
+        "Worlds", [format_world(name, world) for name, world in WORLDS.items()]
+    )
+    print(tree)
+
+
+def format_world(name: str, world: list[MarkerSet]) -> str:
+    tree = format_tree(name, [format_marker_set(marker_set) for marker_set in world])
+    return tree
+
+
+def format_marker_set(marker_set: MarkerSet) -> str:
+    tree = format_tree(
+        marker_set.name, [format_marker(marker) for marker in marker_set.markers]
+    )
+    return tree
+
+
+def format_marker(marker: Marker) -> str:
+    if isinstance(marker, Point):
+        return format_point_marker(marker)
+    elif isinstance(marker, Track):
+        raise NotImplementedError("Track markers are not supported")
+    elif isinstance(marker, Area):
+        raise NotImplementedError("Area markers are not supported")
+    else:
+        raise ValueError(f"Unknown marker type: {marker}")
+
+
+def format_point_marker(marker: Point) -> str:
+    return f"{marker.name} ({marker.x}, {marker.y}, {marker.z})"
+
+
+def format_tree(name: str, items: list[str]) -> str:
+    result = [name]
+    for i, item in enumerate(items):
+        if i == len(items) - 1:
+            for k, line in enumerate(item.splitlines()):
+                if k == 0:
+                    result.append(f"└─ {line}")
+                else:
+                    result.append(f"   {line}")
+        else:
+            for k, line in enumerate(item.splitlines()):
+                if k == 0:
+                    result.append(f"├─ {line}")
+                else:
+                    result.append(f"│  {line}")
+
+    return "\n".join(result)
diff --git a/src/cli/validate.py b/src/cli/validate.py
new file mode 100644
index 0000000..44fb3ba
--- /dev/null
+++ b/src/cli/validate.py
@@ -0,0 +1,200 @@
+from marker_sets import WORLDS
+from lib_marker import Point, Track
+
+
+def validate_marker_data() -> None:
+    for test_name, test_f in _tests.items():
+        results = test_f()
+        if len(results) > 0:
+            print(f"[X] {test_name}")
+            for result in results:
+                print(f"  {result}")
+        else:
+            print(f"[✓] {test_name}")
+
+
+def validate_no_non_included_files() -> list:
+    # TODO: Implement this function
+    return []
+
+
+def validate_no_invalid_y_values() -> list:
+    result = []
+
+    for world_name, marker_sets in WORLDS.items():
+        for marker_set in marker_sets:
+            for marker in marker_set.markers:
+                if isinstance(marker, Point):
+                    if marker.y < 0 or marker.y > 255:
+                        result.append(
+                            {
+                                "error_type": "invalid_y_value",
+                                "full_marker_name": (
+                                    world_name,
+                                    marker_set.name,
+                                    marker.name,
+                                ),
+                                "y_value": marker.y,
+                            }
+                        )
+                elif isinstance(marker, Track):
+                    for i, point in enumerate(marker.points):
+                        _, y, _ = point
+                        if y < 0 or y > 255:
+                            result.append(
+                                {
+                                    "error_type": "invalid_y_value",
+                                    "full_marker_name": (
+                                        world_name,
+                                        marker_set.name,
+                                        marker.name,
+                                    ),
+                                    "index": i,
+                                    "y_value": y,
+                                }
+                            )
+
+    return result
+
+
+def validate_no_duplicate_points_in_tracks() -> list:
+    result = []
+
+    for world_name, marker_sets in WORLDS.items():
+        for marker_set in marker_sets:
+            for marker in marker_set.markers:
+                if isinstance(marker, Track):
+                    points = {}
+                    for point in marker.points:
+                        if point in points:
+                            result.append(
+                                {
+                                    "error_type": "duplicate_point",
+                                    "point_a": points[point],
+                                    "point_b": (
+                                        world_name,
+                                        marker_set.name,
+                                        marker.name,
+                                    ),
+                                    "coordinates": point,
+                                }
+                            )
+                        points[point] = (world_name, marker_set.name, marker.name)
+
+    return result
+
+
+def validate_no_duplicate_marker_names() -> list:
+    result = []
+
+    marker_names = set()
+    for world_name, marker_sets in WORLDS.items():
+        for marker_set in marker_sets:
+            for marker in marker_set.markers:
+                full_name = (world_name, marker_set.name, marker.name)
+                if full_name in marker_names:
+                    result.append(
+                        {
+                            "error_type": "duplicate_marker_name",
+                            "full_marker_name": full_name,
+                        }
+                    )
+                marker_names.add(full_name)
+
+    return result
+
+
+def validate_no_duplicate_marker_set_names() -> list:
+    result = []
+
+    marker_set_names = set()
+    for world_name, marker_sets in WORLDS.items():
+        for marker_set in marker_sets:
+            if (world_name, marker_set.name) in marker_set_names:
+                result.append(
+                    {
+                        "error_type": "duplicate_marker_set_name",
+                        "full_marker_set_name": (world_name, marker_set.name),
+                    }
+                )
+            marker_set_names.add((world_name, marker_set.name))
+
+    return result
+
+
+def validate_no_unused_icons() -> list:
+    # TODO: Implement this function
+    return []
+
+
+def validate_no_duplicate_points() -> list:
+    result = []
+
+    for world_name, marker_sets in WORLDS.items():
+        points = {}
+        for marker_set in marker_sets:
+            for marker in marker_set.markers:
+                if isinstance(marker, Point):
+                    point = (marker.x, marker.y, marker.z)
+                    if point in points:
+                        result.append(
+                            {
+                                "error_type": "duplicate_point",
+                                "point_a": points[point],
+                                "point_b": (world_name, marker_set.name, marker.name),
+                                "coordinates": point,
+                            }
+                        )
+                    points[point] = (world_name, marker_set.name, marker.name)
+                elif isinstance(marker, Track):
+                    for i, point in enumerate(marker.points):
+                        if point in points:
+                            result.append(
+                                {
+                                    "error_type": "duplicate_point",
+                                    "point_a": points[point],
+                                    "point_b": (
+                                        world_name,
+                                        marker_set.name,
+                                        marker.name,
+                                    ),
+                                    "index": i,
+                                    "coordinates": point,
+                                }
+                            )
+                        points[point] = (world_name, marker_set.name, marker.name)
+
+    return result
+
+
+def validate_all_tracks_have_at_least_two_points() -> list:
+    result = []
+
+    for world_name, marker_sets in WORLDS.items():
+        for marker_set in marker_sets:
+            for marker in marker_set.markers:
+                if isinstance(marker, Track) and len(marker.points) < 2:
+                    result.append(
+                        {
+                            "error_type": "track_too_short",
+                            "full_marker_name": (
+                                world_name,
+                                marker_set.name,
+                                marker.name,
+                            ),
+                        }
+                    )
+
+    return result
+
+
+_tests = {
+    "No non-included files": validate_no_non_included_files,
+    "No invalid y coordinates": validate_no_invalid_y_values,
+    "No duplicate points in tracks": validate_no_duplicate_points_in_tracks,
+    "No duplicate marker names": validate_no_duplicate_marker_names,
+    "No duplicate marker-set names": validate_no_duplicate_marker_set_names,
+    "No unused icons": validate_no_unused_icons,
+    "No duplicate points": validate_no_duplicate_points,
+    "All tracks have at least two points": validate_all_tracks_have_at_least_two_points,
+}
diff --git a/src/lib_marker/__init__.py b/src/lib_marker/__init__.py
new file mode 100644
index 0000000..6d8b91a
--- /dev/null
+++ b/src/lib_marker/__init__.py
@@ -0,0 +1,15 @@
+from .area import Area
+from .color import Color
+from .marker import Marker
+from .marker_set import MarkerSet
+from .point import Point
+from .track import Track
+
+__all__ = [
+    "Area",
+    "Color",
+    "Marker",
+    "MarkerSet",
+    "Point",
+    "Track",
+]
diff --git a/src/lib_marker/area.py b/src/lib_marker/area.py
new file mode 100644
index 0000000..74fc682
--- /dev/null
+++ b/src/lib_marker/area.py
@@ -0,0 +1,9 @@
+from dataclasses import dataclass
+
+from .marker import Marker
+
+
+@dataclass
+class Area(Marker):
+    points: list[tuple[int, int, int]]
+    icon: str | None = None
diff --git a/src/lib_marker/color.py b/src/lib_marker/color.py
new file mode 100644
index 0000000..a2cac04
--- /dev/null
+++ b/src/lib_marker/color.py
@@ -0,0 +1,8 @@
+from dataclasses import dataclass
+
+
+@dataclass
+class Color:
+    r: int
+    g: int
+    b: int
diff --git a/src/lib_marker/marker.py b/src/lib_marker/marker.py
new file mode 100644
index 0000000..32902bd
--- /dev/null
+++ b/src/lib_marker/marker.py
@@ -0,0 +1,8 @@
+from abc import ABC
+from dataclasses import dataclass
+
+
+@dataclass
+class Marker(ABC):
+    name: str
+    # icon: str | None = None
diff --git a/src/lib_marker/marker_set.py b/src/lib_marker/marker_set.py
new file mode 100644
index 0000000..cb47bc5
--- /dev/null
+++ b/src/lib_marker/marker_set.py
@@ -0,0 +1,26 @@
+from dataclasses import dataclass
+
+from .color import Color
+from .marker import Marker
+
+
+@dataclass
+class MarkerSet:
+    name: str
+
+    markers: list[Marker]
+
+    # Icon to use for the marker group. If None, the default icon will be used.
+    icon: str | None = None
+
+    # Default icon to use for the markers in the group. If None, the default icon will be used.
+    default_icon: str | None = None
+
+    # Default icon size to use for the markers in the group. If None, the default icon size will be used.
+    default_icon_size: tuple[int, int] | None = None
+
+    # Default color to use for the markers in the group. If None, the default color will be used.
+    default_color: Color | None = None
+
+    # Whether to show this marker group by default.
+    show_by_default: bool = True
diff --git a/src/lib_marker/point.py b/src/lib_marker/point.py
new file mode 100644
index 0000000..6289da2
--- /dev/null
+++ b/src/lib_marker/point.py
@@ -0,0 +1,11 @@
+from dataclasses import dataclass
+
+from .marker import Marker
+
+
+@dataclass
+class Point(Marker):
+    x: int
+    y: int
+    z: int
+    icon: str | None = None
diff --git a/src/lib_marker/track.py b/src/lib_marker/track.py
new file mode 100644
index 0000000..9fd965d
--- /dev/null
+++ b/src/lib_marker/track.py
@@ -0,0 +1,9 @@
+from dataclasses import dataclass
+
+from .marker import Marker
+
+
+@dataclass
+class Track(Marker):
+    points: list[tuple[int, int, int]]
+    icon: str | None = None
diff --git a/src/mapcrafter_exporter/__init__.py b/src/mapcrafter_exporter/__init__.py
new file mode 100644
index 0000000..5438395
--- /dev/null
+++ b/src/mapcrafter_exporter/__init__.py
@@ -0,0 +1,3 @@
+from .exporter import generate_mapcrafter_output
+
+__all__ = ["generate_mapcrafter_output"]
diff --git a/src/mapcrafter_exporter/exporter.py b/src/mapcrafter_exporter/exporter.py
new file mode 100644
index 0000000..6444cc2
--- /dev/null
+++ b/src/mapcrafter_exporter/exporter.py
@@ -0,0 +1,57 @@
+import json
+from pathlib import Path
+
+from marker_sets import WORLDS
+from lib_marker import Point, Track, Area
+
+
+def generate_mapcrafter_output(output_dir: Path):
+    output_dir.mkdir(parents=True, exist_ok=True)
+
+    with (Path(__file__).parent / "markers-template.js").open(
+        "r", encoding="utf-8"
+    ) as f:
+        template = f.read()
+
+    exported_markers_json = json.dumps(
+        convert_data_to_mapcrafter_structure(),
+        indent=2,
+        ensure_ascii=False,
+    )
+
+    template = template.replace('"@EXPORTED_MARKERS@"', exported_markers_json)
+
+    with (output_dir / "markers.js").open("w", encoding="utf-8") as f:
+        f.write(template)
+
+
+def convert_data_to_mapcrafter_structure() -> dict:
+    result = {}
+
+    for world_name, world_marker_sets in WORLDS.items():
+        for marker_set in world_marker_sets:
+            if marker_set.name not in result:
+                result[marker_set.name] = {
+                    "id": marker_set.name.lower().replace(" ", "-"),
+                    "name": marker_set.name,
+                    "showDefault": marker_set.show_by_default,
+                    "markers": {},
+                }
+
+            result[marker_set.name]["markers"][world_name] = []
+            for marker in marker_set.markers:
+                if isinstance(marker, Point):
+                    result[marker_set.name]["markers"][world_name].append(
+                        {"pos": [marker.x, marker.y, marker.z], "title": marker.name}
+                    )
+
+                elif isinstance(marker, Track):
+                    raise NotImplementedError("Track markers are not supported")
+
+                elif isinstance(marker, Area):
+                    raise NotImplementedError("Area markers are not supported")
+
+                else:
+                    raise ValueError(f"Unknown marker type: {marker}")
+
+    return result
diff --git a/src/mapcrafter_exporter/markers-template.js b/src/mapcrafter_exporter/markers-template.js
new file mode 100644
index 0000000..24d6930
--- /dev/null
+++ b/src/mapcrafter_exporter/markers-template.js
@@ -0,0 +1,60 @@
+const MAPCRAFTER_MARKERS = [
+  "@EXPORTED_MARKERS@",
+	{
+	   //
+	   // Tegner et rutenett som viser regiongrensene, og
+	   // koordinatene for hver region.
+	   //
+		"id" : "regioner",
+		"name" : "Regioner",
+		"showDefault" : false,
+		"createMarker" : function(ui, groupInfo, markerInfo) {
+		       var rmax = 15;
+		       var objekter = [];
+
+		       var multilatlngs = [];
+
+		       for (var rx = -rmax; rx < rmax; rx++) {
+			   var latlngs = [];
+			   var miny = -rmax*512;
+			   var maxy = rmax*512;
+			   var x = rx*512;
+			   // use the ui.mcToLatLng-function to convert Minecraft coords to LatLngs
+			   latlngs.push(ui.mcToLatLng(x, miny, 64));
+			   latlngs.push(ui.mcToLatLng(x, maxy, 64));
+			   multilatlngs.push(latlngs);
+			}
+
+		       for (var ry = -rmax; ry < rmax; ry++) {
+			   var latlngs = [];
+			   var minx = -rmax*512;
+			   var maxx = rmax*512;
+			   var y = ry*512;
+			   // use the ui.mcToLatLng-function to convert Minecraft coords to LatLngs
+			   latlngs.push(ui.mcToLatLng(minx, y, 64));
+			   latlngs.push(ui.mcToLatLng(maxx, y, 64));
+			   multilatlngs.push(latlngs);
+			}
+
+		       for (var rx = -rmax; rx < rmax; rx++) {
+		           for (var ry = -rmax; ry < rmax; ry++) {
+				var x = rx*512 + 256;
+				var y = ry*512 + 256;
+
+				var myIcon = L.divIcon({iconSize: L.point(55, 20), html: "<center>r." + String(rx) + "." + String(ry) + "</center>"});
+				var myMarker = L.marker(ui.mcToLatLng(x, y, 64), {icon: myIcon});
+				objekter.push(myMarker);
+			   }
+			}
+
+		   var linjer = [];
+		       if (L.version.startsWith("0.7.")) {
+		           linjer = L.multiPolyline(multilatlngs, {"color" : markerInfo.color});
+			} else {
+		           linjer = L.polyline(multilatlngs, {"color" : markerInfo.color});
+			}
+		       objekter.push(linjer);
+			return L.layerGroup(objekter);
+		},
+	},
+];
diff --git a/src/marker_sets/__init__.py b/src/marker_sets/__init__.py
new file mode 100644
index 0000000..f4ad95e
--- /dev/null
+++ b/src/marker_sets/__init__.py
@@ -0,0 +1,11 @@
+from lib_marker import MarkerSet
+
+from .nether import MARKER_SETS as nether_marker_sets
+from .overworld import MARKER_SETS as overworld_marker_sets
+from .the_end import MARKER_SETS as the_end_marker_sets
+
+WORLDS: dict[str, list[MarkerSet]] = {
+    "Nether": nether_marker_sets,
+    "Overworld": overworld_marker_sets,
+    "The End": the_end_marker_sets,
+}
diff --git a/src/marker_sets/nether/__init__.py b/src/marker_sets/nether/__init__.py
new file mode 100644
index 0000000..ab88ae3
--- /dev/null
+++ b/src/marker_sets/nether/__init__.py
@@ -0,0 +1,14 @@
+from .area_names import MARKER_SET as area_names_marker_set
+from .ice_tracks import MARKER_SET as ice_tracks_marker_set
+from .other import MARKER_SET as other_marker_set
+from .portals import MARKER_SET as portals_marker_set
+from .railways import MARKER_SET as railways_marker_set
+
+
+MARKER_SETS = [
+    area_names_marker_set,
+    ice_tracks_marker_set,
+    other_marker_set,
+    portals_marker_set,
+    railways_marker_set,
+]
diff --git a/src/marker_sets/nether/area_names.py b/src/marker_sets/nether/area_names.py
new file mode 100644
index 0000000..ad5cf7f
--- /dev/null
+++ b/src/marker_sets/nether/area_names.py
@@ -0,0 +1,14 @@
+from lib_marker import MarkerSet, Point
+
+MARKER_SET = MarkerSet(
+    name="Area Names",
+    markers=[
+        Point(
+            name="Grisebukta",
+            icon=None,
+            x=-900,
+            y=64,
+            z=27,
+        ),
+    ],
+)
diff --git a/src/marker_sets/nether/ice_tracks.py b/src/marker_sets/nether/ice_tracks.py
new file mode 100644
index 0000000..86a2446
--- /dev/null
+++ b/src/marker_sets/nether/ice_tracks.py
@@ -0,0 +1,7 @@
+from lib_marker import MarkerSet
+
+
+MARKER_SET = MarkerSet(
+    name="Ice tracks",
+    markers=[],
+)
diff --git a/src/marker_sets/nether/other.py b/src/marker_sets/nether/other.py
new file mode 100644
index 0000000..6d160b7
--- /dev/null
+++ b/src/marker_sets/nether/other.py
@@ -0,0 +1,7 @@
+from lib_marker import MarkerSet
+
+
+MARKER_SET = MarkerSet(
+    name="Other",
+    markers=[],
+)
diff --git a/src/marker_sets/nether/portals.py b/src/marker_sets/nether/portals.py
new file mode 100644
index 0000000..07f8e47
--- /dev/null
+++ b/src/marker_sets/nether/portals.py
@@ -0,0 +1,7 @@
+from lib_marker import MarkerSet
+
+
+MARKER_SET = MarkerSet(
+    name="Portals",
+    markers=[],
+)
diff --git a/src/marker_sets/nether/railways.py b/src/marker_sets/nether/railways.py
new file mode 100644
index 0000000..5cbe19e
--- /dev/null
+++ b/src/marker_sets/nether/railways.py
@@ -0,0 +1,7 @@
+from lib_marker import MarkerSet
+
+
+MARKER_SET = MarkerSet(
+    name="Railways",
+    markers=[],
+)
diff --git a/src/marker_sets/overworld/__init__.py b/src/marker_sets/overworld/__init__.py
new file mode 100644
index 0000000..908089f
--- /dev/null
+++ b/src/marker_sets/overworld/__init__.py
@@ -0,0 +1,27 @@
+from .area_names import MARKER_SET as area_names_marker_set
+from .buildings import MARKER_SET as buildings_marker_set
+from .cities import MARKER_SET as cities_marker_set
+from .homes import MARKER_SET as homes_marker_set
+from .huts import MARKER_SET as huts_marker_set
+from .infrastructure import MARKER_SET as infrastructure_marker_set
+from .mines import MARKER_SET as mines_marker_set
+from .nature import MARKER_SET as nature_marker_set
+from .other import MARKER_SET as other_marker_set
+from .railways import MARKER_SET as railways_marker_set
+from .roads import MARKER_SET as roads_marker_set
+from .villages import MARKER_SET as villages_marker_set
+
+MARKER_SETS = [
+    area_names_marker_set,
+    buildings_marker_set,
+    cities_marker_set,
+    homes_marker_set,
+    huts_marker_set,
+    infrastructure_marker_set,
+    mines_marker_set,
+    nature_marker_set,
+    other_marker_set,
+    railways_marker_set,
+    roads_marker_set,
+    villages_marker_set,
+]
diff --git a/src/marker_sets/overworld/area_names.py b/src/marker_sets/overworld/area_names.py
new file mode 100644
index 0000000..0b65aad
--- /dev/null
+++ b/src/marker_sets/overworld/area_names.py
@@ -0,0 +1,42 @@
+from lib_marker import MarkerSet, Point
+
+MARKER_SET = MarkerSet(
+    name="Area Names",
+    markers=[
+        Point(
+            name="Andøya",
+            icon=None,
+            x=2300,
+            y=64,
+            z=250,
+        ),
+        Point(
+            name="England",
+            icon=None,
+            x=-1189,
+            y=64,
+            z=1556,
+        ),
+        Point(
+            name="Hemmelig mesabiom",
+            icon=None,
+            x=-980,
+            y=64,
+            z=4090,
+        ),
+        Point(
+            name="Summefjord",
+            icon=None,
+            x=-220,
+            y=64,
+            z=2890,
+        ),
+        Point(
+            name="Vestisødet",
+            icon=None,
+            x=-800,
+            y=64,
+            z=0,
+        ),
+    ],
+)
diff --git a/src/marker_sets/overworld/buildings.py b/src/marker_sets/overworld/buildings.py
new file mode 100644
index 0000000..4c141bb
--- /dev/null
+++ b/src/marker_sets/overworld/buildings.py
@@ -0,0 +1,70 @@
+from lib_marker import MarkerSet, Point
+
+MARKER_SET = MarkerSet(
+    name="Buildings",
+    markers=[
+        Point(
+            name="Der Kölner Dom",
+            icon=None,
+            x=4630,
+            y=64,
+            z=270,
+        ),
+        Point(
+            name="Fyret",
+            icon=None,
+            x=3085,
+            y=64,
+            z=424,
+        ),
+        Point(
+            name="Hodeskallegrotten",
+            icon=None,
+            x=267,
+            y=89,
+            z=-496,
+        ),
+        Point(
+            name="Isjungelkatedralen",
+            icon=None,
+            x=-378,
+            y=64,
+            z=153,
+        ),
+        Point(
+            name="Jesus Christ Superstore",
+            icon=None,
+            x=280,
+            y=64,
+            z=-2800,
+        ),
+        Point(
+            name="Kystbasen",
+            icon=None,
+            x=-334,
+            y=116,
+            z=473,
+        ),
+        Point(
+            name="Tårnodden",
+            icon=None,
+            x=-22,
+            y=76,
+            z=67,
+        ),
+        Point(
+            name="Tegltårnet",
+            icon=None,
+            x=-99,
+            y=99,
+            z=1025,
+        ),
+        Point(
+            name="Vinterstranda hotel & resort",
+            icon=None,
+            x=3481,
+            y=75,
+            z=210,
+        ),
+    ],
+)
diff --git a/src/marker_sets/overworld/cities.py b/src/marker_sets/overworld/cities.py
new file mode 100644
index 0000000..9e0f698
--- /dev/null
+++ b/src/marker_sets/overworld/cities.py
@@ -0,0 +1,42 @@
+from lib_marker import MarkerSet, Point
+
+MARKER_SET = MarkerSet(
+    name="Cities",
+    markers=[
+        Point(
+            name="Heimfjell",
+            icon=None,
+            x=177,
+            y=64,
+            z=177,
+        ),
+        Point(
+            name="Holmgard",
+            icon=None,
+            x=4468,
+            y=64,
+            z=1337,
+        ),
+        Point(
+            name="Tangen",
+            icon=None,
+            x=58,
+            y=63,
+            z=-2860,
+        ),
+        Point(
+            name="Tosjødalen",
+            icon=None,
+            x=960,
+            y=64,
+            z=460,
+        ),
+        Point(
+            name="Vikingelandsbyen",
+            icon=None,
+            x=360,
+            y=64,
+            z=-460,
+        ),
+    ],
+)
diff --git a/src/marker_sets/overworld/homes.py b/src/marker_sets/overworld/homes.py
new file mode 100644
index 0000000..0121b4f
--- /dev/null
+++ b/src/marker_sets/overworld/homes.py
@@ -0,0 +1,84 @@
+from lib_marker import MarkerSet, Point
+
+MARKER_SET = MarkerSet(
+    name="Homes",
+    markers=[
+        Point(
+            name="Akasienborg",
+            icon=None,
+            x=-128,
+            y=64,
+            z=1460,
+        ),
+        Point(
+            name="Bikkjeby",
+            icon=None,
+            x=2950,
+            y=64,
+            z=270,
+        ),
+        Point(
+            name="Biosfæren",
+            icon=None,
+            x=834,
+            y=65,
+            z=-3089,
+        ),
+        Point(
+            name="Bjørkeholmen",
+            icon=None,
+            x=102,
+            y=77,
+            z=37,
+        ),
+        Point(
+            name="Bjørnebukten",
+            icon=None,
+            x=473,
+            y=78,
+            z=-3043,
+        ),
+        Point(
+            name="Huløyeid",
+            icon=None,
+            x=-54,
+            y=64,
+            z=234,
+        ),
+        Point(
+            name="Singapore",
+            icon=None,
+            x=-600,
+            y=64,
+            z=1130,
+        ),
+        Point(
+            name="Summevatn",
+            icon=None,
+            x=-110,
+            y=64,
+            z=3465,
+        ),
+        Point(
+            name="SuperTheodors fiskehus",
+            icon=None,
+            x=1570,
+            y=64,
+            z=3285,
+        ),
+        Point(
+            name="Svartskoghavn",
+            icon=None,
+            x=-370,
+            y=64,
+            z=2390,
+        ),
+        Point(
+            name="Vestlandet",
+            icon=None,
+            x=-2204,
+            y=64,
+            z=447,
+        ),
+    ],
+)
diff --git a/src/marker_sets/overworld/huts.py b/src/marker_sets/overworld/huts.py
new file mode 100644
index 0000000..f051f20
--- /dev/null
+++ b/src/marker_sets/overworld/huts.py
@@ -0,0 +1,28 @@
+from lib_marker import MarkerSet, Point
+
+MARKER_SET = MarkerSet(
+    name="Huts",
+    markers=[
+        Point(
+            name="Dypskiferhytta",
+            icon=None,
+            x=-1563,
+            y=64,
+            z=-1966,
+        ),
+        Point(
+            name="Grensebuelvbu",
+            icon=None,
+            x=550,
+            y=64,
+            z=-1480,
+        ),
+        Point(
+            name="Nyverdenhytta",
+            icon=None,
+            x=848,
+            y=70,
+            z=1583,
+        ),
+    ],
+)
diff --git a/src/marker_sets/overworld/infrastructure.py b/src/marker_sets/overworld/infrastructure.py
new file mode 100644
index 0000000..dae0b59
--- /dev/null
+++ b/src/marker_sets/overworld/infrastructure.py
@@ -0,0 +1,21 @@
+from lib_marker import MarkerSet, Point
+
+MARKER_SET = MarkerSet(
+    name="Infrastructure",
+    markers=[
+        Point(
+            name="Grantrebukta",
+            icon=None,
+            x=2350,
+            y=64,
+            z=-136,
+        ),
+        Point(
+            name="Smalelvbro",
+            icon=None,
+            x=77,
+            y=69,
+            z=-348,
+        ),
+    ],
+)
diff --git a/src/marker_sets/overworld/mines.py b/src/marker_sets/overworld/mines.py
new file mode 100644
index 0000000..902aeef
--- /dev/null
+++ b/src/marker_sets/overworld/mines.py
@@ -0,0 +1,21 @@
+from lib_marker import MarkerSet, Point
+
+MARKER_SET = MarkerSet(
+    name="Mines",
+    markers=[
+        Point(
+            name="Sandsteingruva",
+            icon=None,
+            x=56,
+            y=67,
+            z=-266,
+        ),
+        Point(
+            name="Slimegruva",
+            icon=None,
+            x=-206,
+            y=64,
+            z=-35,
+        ),
+    ],
+)
diff --git a/src/marker_sets/overworld/nature.py b/src/marker_sets/overworld/nature.py
new file mode 100644
index 0000000..8faf7f5
--- /dev/null
+++ b/src/marker_sets/overworld/nature.py
@@ -0,0 +1,140 @@
+from lib_marker import MarkerSet, Point
+
+MARKER_SET = MarkerSet(
+    name="Nature",
+    markers=[
+        Point(
+            name="Blindodden",
+            icon=None,
+            x=874,
+            y=65,
+            z=160,
+        ),
+        Point(
+            name="Hulevatna",
+            icon=None,
+            x=240,
+            y=64,
+            z=3070,
+        ),
+        Point(
+            name="Kirkemyr",
+            icon=None,
+            x=6880,
+            y=64,
+            z=-465,
+        ),
+        Point(
+            name="Lamafjellet",
+            icon=None,
+            x=1810,
+            y=64,
+            z=-1630,
+        ),
+        Point(
+            name="Langstrand",
+            icon=None,
+            x=-305,
+            y=64,
+            z=535,
+        ),
+        Point(
+            name="Lille isbjørnelv",
+            icon=None,
+            x=730,
+            y=64,
+            z=-1900,
+        ),
+        Point(
+            name="Naturreservat",
+            icon=None,
+            x=4,
+            y=64,
+            z=800,
+        ),
+        Point(
+            name="Piratbukta",
+            icon=None,
+            x=150,
+            y=64,
+            z=80,
+        ),
+        Point(
+            name="Snøklippan",
+            icon=None,
+            x=-1654,
+            y=64,
+            z=-654,
+        ),
+        Point(
+            name="Store isbjørnelv",
+            icon=None,
+            x=850,
+            y=64,
+            z=-2130,
+        ),
+        Point(
+            name="Storhavet i øst",
+            icon=None,
+            x=3000,
+            y=64,
+            z=1000,
+        ),
+        Point(
+            name="Storhavskanalen",
+            icon=None,
+            x=1005,
+            y=64,
+            z=1335,
+        ),
+        Point(
+            name="Storsnøfjella",
+            icon=None,
+            x=5470,
+            y=64,
+            z=-270,
+        ),
+        Point(
+            name="Storvatnet",
+            icon=None,
+            x=675,
+            y=64,
+            z=362,
+        ),
+        Point(
+            name="SuperTheodors strand",
+            icon=None,
+            x=2111,
+            y=64,
+            z=3777,
+        ),
+        Point(
+            name="Trangdalen",
+            icon=None,
+            x=-47,
+            y=64,
+            z=146,
+        ),
+        Point(
+            name="Turrikkelmyra",
+            icon=None,
+            x=-160,
+            y=64,
+            z=1480,
+        ),
+        Point(
+            name="Ulveelva",
+            icon=None,
+            x=910,
+            y=64,
+            z=3050,
+        ),
+        Point(
+            name="Vestsumpland",
+            icon=None,
+            x=-1818,
+            y=64,
+            z=98,
+        ),
+    ],
+)
diff --git a/src/marker_sets/overworld/other.py b/src/marker_sets/overworld/other.py
new file mode 100644
index 0000000..0b1f64b
--- /dev/null
+++ b/src/marker_sets/overworld/other.py
@@ -0,0 +1,21 @@
+from lib_marker import MarkerSet, Point
+
+MARKER_SET = MarkerSet(
+    name="Other",
+    markers=[
+        Point(
+            name="Leirhavn",
+            icon=None,
+            x=512,
+            y=64,
+            z=-3320,
+        ),
+        Point(
+            name="Nullpunkt",
+            icon=None,
+            x=0,
+            y=64,
+            z=0,
+        ),
+    ],
+)
diff --git a/src/marker_sets/overworld/railways.py b/src/marker_sets/overworld/railways.py
new file mode 100644
index 0000000..5cbe19e
--- /dev/null
+++ b/src/marker_sets/overworld/railways.py
@@ -0,0 +1,7 @@
+from lib_marker import MarkerSet
+
+
+MARKER_SET = MarkerSet(
+    name="Railways",
+    markers=[],
+)
diff --git a/src/marker_sets/overworld/roads.py b/src/marker_sets/overworld/roads.py
new file mode 100644
index 0000000..3db4f78
--- /dev/null
+++ b/src/marker_sets/overworld/roads.py
@@ -0,0 +1,7 @@
+from lib_marker import MarkerSet
+
+
+MARKER_SET = MarkerSet(
+    name="Roads",
+    markers=[],
+)
diff --git a/src/marker_sets/overworld/villages.py b/src/marker_sets/overworld/villages.py
new file mode 100644
index 0000000..6a91b9f
--- /dev/null
+++ b/src/marker_sets/overworld/villages.py
@@ -0,0 +1,70 @@
+from lib_marker import MarkerSet, Point
+
+MARKER_SET = MarkerSet(
+    name="Villages",
+    markers=[
+        Point(
+            name="Bondeby",
+            icon=None,
+            x=6200,
+            y=64,
+            z=-300,
+        ),
+        Point(
+            name="Gammelleirnes",
+            icon=None,
+            x=800,
+            y=64,
+            z=-3300,
+        ),
+        Point(
+            name="Hestelandsby",
+            icon=None,
+            x=2734,
+            y=64,
+            z=-984,
+        ),
+        Point(
+            name="Isbjørnby",
+            icon=None,
+            x=723,
+            y=64,
+            z=-2380,
+        ),
+        Point(
+            name="Ittoqqortoormiit",
+            icon=None,
+            x=100,
+            y=64,
+            z=-3830,
+        ),
+        Point(
+            name="Kløfteby",
+            icon=None,
+            x=695,
+            y=64,
+            z=2812,
+        ),
+        Point(
+            name="NPC-landsby nord",
+            icon=None,
+            x=337,
+            y=64,
+            z=-853,
+        ),
+        Point(
+            name="NPC-landsby",
+            icon=None,
+            x=1278,
+            y=64,
+            z=-397,
+        ),
+        Point(
+            name="Smedby",
+            icon=None,
+            x=-1760,
+            y=64,
+            z=-2440,
+        ),
+    ],
+)
diff --git a/src/marker_sets/the_end/__init__.py b/src/marker_sets/the_end/__init__.py
new file mode 100644
index 0000000..ee65ee7
--- /dev/null
+++ b/src/marker_sets/the_end/__init__.py
@@ -0,0 +1,7 @@
+from .other import MARKER_SET as other_marker_set
+from .portals import MARKER_SET as portals_marker_set
+
+MARKER_SETS = [
+    other_marker_set,
+    portals_marker_set,
+]
diff --git a/src/marker_sets/the_end/other.py b/src/marker_sets/the_end/other.py
new file mode 100644
index 0000000..6d160b7
--- /dev/null
+++ b/src/marker_sets/the_end/other.py
@@ -0,0 +1,7 @@
+from lib_marker import MarkerSet
+
+
+MARKER_SET = MarkerSet(
+    name="Other",
+    markers=[],
+)
diff --git a/src/marker_sets/the_end/portals.py b/src/marker_sets/the_end/portals.py
new file mode 100644
index 0000000..07f8e47
--- /dev/null
+++ b/src/marker_sets/the_end/portals.py
@@ -0,0 +1,7 @@
+from lib_marker import MarkerSet
+
+
+MARKER_SET = MarkerSet(
+    name="Portals",
+    markers=[],
+)
diff --git a/uv.lock b/uv.lock
new file mode 100644
index 0000000..fa9f551
--- /dev/null
+++ b/uv.lock
@@ -0,0 +1,7 @@
+version = 1
+requires-python = ">=3.12"
+
+[[package]]
+name = "minecraft-kartverket"
+version = "0.1.0"
+source = { editable = "." }