rtnf’s Diary | Self-hosted vector tiles.

2023-01-26 05:02:23

Impressed by this video, i wish to make my very own self-hosted vector tiles.

First, put together a number of geojson file through the use of JOSM. Every geojson file will function a “layer”. We are able to specify the fashion for every layer. I made three layer (mainroad, suburb, jalan_rest), with this specification

  • mainroad : freeway= (secondary | major | trunk | tertiary)
  • suburb : place=suburb
  • jalan_rest : freeway= (* && not secondary && not major && not trunk && not tertiary)

Use JOSM, create overpass question, save as .geojson, repeat.

Second, convert these geojson file to mbtile format through the use of tippecanoe. Putting in tippecanoe on MacOS / Linux is fairly easy. However, putting in on Home windows wants a quick-hack. I adopted this information , it really works.

Then mix all these geojson file into one mbtile file through the use of tippecanoe.

Then, convert that mbtile file to pmtile through the use of go-pmtiles

Now, let’s show that mbtile and do some styling.

Index.html, first, let’s import maplibre-gl and pmtiles javascript library.

<script src="https://www.openstreetmap.org/consumer/rtnf/diary/maplibre-gl.js"></script>
<hyperlink href="maplibre-gl.css" rel="stylesheet" />
<script src="pmtiles-2.5.0.js"></script>

Then, outline the map

let protocol = new pmtiles.Protocol();
        maplibregl.addProtocol("pmtiles",protocol.tile);
        console.log(maplibregl)
        var map = new maplibregl.Map({
            container: 'map',
            fashion: 'kinds/maptiler-basic.json',
            heart: [106.99811303126697,-6.295502009348816],
            zoom: 11
        });

The remainder of the configurations are saved on that “maptiler-basic.json”.

See Also

Let’s configure the pmtiles file

"sources": {
    "openmaptiles": {
      "kind": "vector",
      "url": "pmtiles://bks2.pmtiles"
    }
  }

Then, configure the fonts file

 "glyphs": "fonts-gh-pages/{fontstack}/{vary}.pbf"

Lastly, configure the precise map fashion. Match the “layer” from tippecanoe’s output to “source-layer” tag.

Mainroad layer fashion :

{
      "id": "road_major_motorway",
      "kind": "line",
      "supply": "openmaptiles",
      "source-layer": "mainroad",
      "structure": {"line-cap": "spherical", "line-join": "spherical"},
      "paint": {
        "line-color": "hsl(0, 0%, 100%)",
        "line-offset": 0,
        "line-width": {"base": 1.4, "stops": [[8, 1], [16, 10]]}
      }
    }

Suburb layer fashion

{
      "id": "place_label_city",
      "kind": "image",
      "supply": "openmaptiles",
      "source-layer": "suburb",
      "maxzoom": 16,
      "structure": {
        "text-field": "{title}",
        "text-font": ["Open Sans Regular"],
        "text-max-width": 10,
        "text-size": {"stops": [[3, 12], [8, 16]]}
      },
      "paint": {
        "text-color": "hsl(0, 0%, 0%)",
        "text-halo-blur": 0,
        "text-halo-color": "hsla(0, 0%, 100%, 0.75)",
        "text-halo-width": 2
      }
    }

Jalan-rest layer fashion

{
      "id": "road_minor",
      "kind": "line",
      "supply": "openmaptiles",
      "source-layer": "jalan_rest",
      "minzoom": 13,
      "structure": {"line-cap": "spherical", "line-join": "spherical"},
      "paint": {
        "line-color": "hsl(0, 0%, 97%)",
        "line-width": {"base": 1.55, "stops": [[4, 0.25], [20, 30]]}
      }
    }

Highway label configuration

 {
      "id": "road_major_label",
      "kind": "image",
      "supply": "openmaptiles",
      "source-layer": "mainroad",
      "minzoom": 13,
      "structure": {
        "symbol-placement": "line",
        "text-field": "{title}",
        "text-font": ["Open Sans Regular"],
        "text-letter-spacing": 0.1,
        "text-rotation-alignment": "map",
        "text-size": {"base": 1.4, "stops": [[10, 8], [20, 14]]},
        "text-transform": "uppercase",
        "visibility": "seen"
      },
      "paint": {
        "text-color": "#000",
        "text-halo-color": "hsl(0, 0%, 100%)",
        "text-halo-width": 2
      }
    },
    {
      "id": "road_minor_label",
      "kind": "image",
      "supply": "openmaptiles",
      "source-layer": "jalan_rest",
      "minzoom": 13,
      "structure": {
        "symbol-placement": "line",
        "text-field": "{title}",
        "text-font": ["Open Sans Regular"],
        "text-letter-spacing": 0.1,
        "text-rotation-alignment": "map",
        "text-size": {"base": 1.4, "stops": [[10, 8], [20, 14]]},
        "text-transform": "uppercase",
        "visibility": "seen"
      },
      "paint": {
        "text-color": "#000",
        "text-halo-color": "hsl(0, 0%, 100%)",
        "text-halo-width": 2
      }
    }

Performed!

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