Jerome's world map
The world map of the Jerome writing app, which downloads these three files once and shows the map offline: the countries, regions, rivers, lakes, towns, major roads and railways of Natural Earth, its shaded relief, and a place search over the settlements of Wikidata with an English name. There are no streets. Jerome pins each file by this repository's commit, its size and its SHA-256.
| File | What it is |
|---|---|
world.pmtiles |
Natural Earth 5.1.2 as vector tiles (Mapbox Vector Tile 2, gzipped), zooms 0–7, in a PMTiles v3 archive; 1:110m at zooms 0–1, 1:50m at 2–3, 1:10m from 4 |
relief.pmtiles |
Natural Earth's shaded relief (1:10m, the smaller size) as 256-pixel JPEG tiles, zooms 0–6, Web Mercator, in a PMTiles v3 archive |
gazetteer.tsv.gz |
About 1.3 million settlements from Wikidata with an English name and coordinates, each with its country, region and population, as gzipped tab-separated text sorted by a folded key (the format is in Jerome's crates/maps/README.md) |
Layers of world.pmtiles
rank is a whole number, lower for the more important, from Natural Earth's
scale and label ranks. Names are English (Natural Earth's NAME_EN, else its
NAME). A feature appears from the zoom Natural Earth gives it; zoom 7 holds
them all.
| Layer | What | Properties | From zoom |
|---|---|---|---|
water |
Oceans and seas | – | 0 |
land |
Land, islands included | – | 0 |
lakes |
Lakes and reservoirs | name |
0 |
urban |
Urban areas | – | 2 |
rivers |
Rivers and lake centre lines | name, rank |
0 |
regions |
Boundaries of first-level divisions (states, provinces, regions) | – | 2 |
countries |
Boundaries between countries on land: kind country, or disputed for any other line | kind |
0 |
roads |
Major roads: kind major (highways, beltways, expressways) or secondary; no ferries | kind |
3 |
railways |
Railways; no train ferries | – | 4 |
region_labels |
A point for each first-level division's name | name, rank |
2 |
country_labels |
A point for each country's name | name, rank |
0 |
places |
Cities and towns: capital 2 for a country's capital, 1 for a region's, else 0 | name, rank, capital |
0 |
How it is made
Jerome's scripts/build-world-map.ts builds the three files from inputs
pinned, with their sizes and checksums, in Jerome's sources.lock.json and
mirrored in
Freonius/jerome-sources:
Natural Earth's GeoJSON from
nvkelso/natural-earth-vector
at the release's commit, the shaded relief from naciscdn.org, and the answers
of QLever's Wikidata endpoint to the queries in
Jerome's packages/map-data/queries/. The tiles are cut with
geojson-vt and encoded with
vt-pbf; the archives and the relief are
written by Jerome's own map-tool.
Licences
- Natural Earth vectors and rasters are in the public domain; no permission is needed to use them. Made with Natural Earth. Free vector and raster map data @ naturalearthdata.com.
- Wikidata's data is available under CC0 1.0. Place names from Wikidata.
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