Lib.rs

EarthWyrm is a Rust library for displaying vector tile maps in a WebAssembly context.

Wyrm tiles are geographic vector maps designed for fluid browser interactivity. A single tile is a "snippet" or fragment of SVG designed to be inserted into a web page's DOM with no modification.

Geographic coordinates for all map features are converted to Web Mercator.

Tiles are named using a ZXY naming scheme, with a wyrm file extension (e.g. https://example.com/wyrm/12/990/1450.wyrm).

Tiles are square, scaled to 256x256 units, cropped at a margin of 8 around each edge. Path coordinates are rounded to the nearest integer.

Example tile: 14/3944/5895.wyrm

<g class="wyrm-county">
  <path class="osm-1795848"
        data-name="Hennepin County"
        data-population="1223149"
        d="m-8 -8h272v272h-272v-272z" />
</g>
<g class="wyrm-city">
  <path class="osm-136712"
        data-name="Minneapolis"
        data-population="429954"
        d="m129 264v-109l1 -102l118 -1v-59l16 -1v272h-136z" />
  <path class="osm-136699"
        data-name="Golden Valley"
        data-population="19921"
        d="m-8 -8l256 1v59l-118 1l-1 102v73h-34l-39 -1h-64v-235z" />
  <path class="osm-136701"
        data-name="Saint Louis Park"
        data-population="50010"
        d="m-8 227h64l39 1h34v36h-137v-155z" />
</g>

Layers are styled with standard CSS.

• Library documentation
• WyrmCast map server