| --- |
| license: other |
| license_name: public-domain-and-cc0-1.0 |
| license_link: https://huggingface.co/datasets/Freonius/jerome-maps/blob/main/README.md#licences |
| viewer: false |
| language: |
| - en |
| tags: |
| - maps |
| - gazetteer |
| - natural-earth |
| - wikidata |
| - jerome |
| pretty_name: Jerome's world map |
| --- |
| |
| # 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](https://www.naturalearthdata.com/), |
| its shaded relief, and a place search over the settlements of |
| [Wikidata](https://www.wikidata.org/) 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](https://github.com/protomaps/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](https://huggingface.co/datasets/Freonius/jerome-sources): |
| Natural Earth's GeoJSON from |
| [nvkelso/natural-earth-vector](https://github.com/nvkelso/natural-earth-vector) |
| at the release's commit, the shaded relief from naciscdn.org, and the answers |
| of [QLever](https://qlever.dev/wikidata)'s Wikidata endpoint to the queries in |
| Jerome's `packages/map-data/queries/`. The tiles are cut with |
| [geojson-vt](https://github.com/mapbox/geojson-vt) and encoded with |
| [vt-pbf](https://github.com/mapbox/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](https://creativecommons.org/publicdomain/zero/1.0/). Place names |
| from Wikidata. |
|
|
