Salish Sea basemap 2026.10.22

The files of this version of the basemap, built from the commit tagged 2026.10.22. None of them ever changes, so a page can name them and cache them for a year. How to use them is in the README.

The map

Image tiles

For stitching into a picture rather than drawing a map: 256-pixel tiles, each drawn at 512 pixels, without labels. Put a tile's zoom and position in place of {z}, {x} and {y}.

https://tiles.salishsea.io/images/c271f1d11804c054/{z}/{x}/{y}.webp

They cover only some of the map at the closer zooms, so the tiles there are listed, one z x y to a line: https://tiles.salishsea.io/images/c271f1d11804c054/tiles.txt

Place names

For a search that takes people to a place on the map, the place lists give their places as rows of their columns: the name, its kind, a longitude and latitude to look at, a zoom to look from (MapLibre's), and any other names it goes by. The water regions' list is GeoJSON instead, its features the regions, each with its name as a card would say it and its base name as the map labels it (decision 027).

• https://tiles.salishsea.io/places/places-gazetteers-6ebc4b7473854290.json

  Names of the Salish Sea's water and of points on it, as the basemap labels them by zoom 12. 1,547 places. Public domain in the US; Canadian names under the Open Government Licence – Canada; credit “Contains information licensed under the Open Government Licence – Canada”.

• https://tiles.salishsea.io/places/places-osm-c2e7cd37c8651122.json

  The Salish Sea's larger islands, its cities, towns and villages, and its ferry terminals, as OpenStreetMap names them. 559 places. Open Database License (ODbL) 1.0; credit “© OpenStreetMap contributors”.

• https://tiles.salishsea.io/places/places-regions-e25c8dde585a7200.json

  The water regions: one for each water name the map labels, together covering the water from 42°N to 51.5°N, each with its name as a card would say it. 1,454 regions. Public domain in the US; Canadian names and outlines under the Open Government Licence – Canada; British Columbia's land under the Open Government Licence – British Columbia; credit “Contains information licensed under the Open Government Licence – Canada and the Open Government Licence – British Columbia”.

Vector and elevation tiles

The PMTiles archives the style draws from, by the name of the style's source.