Attribution
Last updated
squidmaps is built on the work of many people who share their data, software, icons and fonts openly. Thank you. This page credits them and their licenses.
Map data
OpenStreetMap
The streets, places, water, parks and labels on every squidmaps basemap come from OpenStreetMap, made by its contributors and available under the Open Database License (ODbL). © OpenStreetMap contributors.
Protomaps
squidmaps’ basemaps are vector tiles from Protomaps, built from OpenStreetMap, drawn with styles modified from the Protomaps basemaps:
- Basemap design by Geraldine Sarmiento for Protomaps LLC (CC0). Code © Protomaps LLC and Kelso Cartography, BSD 3-Clause, including the Tilezen schema (MIT).
- Map icons derived from Mapzen’s tangrams/icons (MIT).
- Map fonts from protomaps/basemaps-assets: Noto Sans, under the SIL Open Font License.
Protomaps created the PMTiles format that its tiles are built in.
Geocode Earth
Place search in the editor is powered by Geocode Earth, built on the open source Pelias geocoder and open data from OpenStreetMap and others. © Geocode Earth, OpenStreetMap and others.
ZIP codes
Spreadsheets with US ZIP codes are placed using the internal points of ZIP Code Tabulation Areas from the U.S. Census Bureau’s 2020 Gazetteer Files, which are in the public domain.
Routing
When routing is turned on, routes come from openrouteservice by HeiGIT, Geoapify or OSRM, each credited on the map while it’s in use.
Where the editor comes from
squidmaps began as a fork of Placemark, the open source map editor by Tom MacWright, © 2023 Placemark, MIT. Its license is kept in squidmaps’ own. squidmaps also uses Tom MacWright’s and Placemark’s libraries for reading and writing geographic formats:
- togeojson for KML, GPX and TCX (BSD 2-Clause)
- betterknown for WKT (MIT)
- check-geojson, geojson-rewind, osmtogeojson, polyline and tokml (MIT)
Icons, emoji and fonts
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Font Awesome Free by Fonticons, Inc.: icons under CC BY 4.0, fonts under the SIL Open Font License 1.1, and code under MIT.
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Twemoji: emoji graphics © Twitter, Inc. and other contributors, under CC BY 4.0.
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Nunito, Nunito Sans and JetBrains Mono, under the SIL Open Font License 1.1.
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Null Island buoy by Ekta Daryanani, on the page-not-found map, under CC BY 4.0.
Open source software
Maps and geodata
| Project | What it does in squidmaps | License |
|---|---|---|
| MapLibre GL JS | Draws every map, in the editor and on published maps | BSD 3-Clause |
| Turf.js | Measures and changes shapes | MIT |
| Proj4js | Reprojects coordinates, like a shapefile’s | MIT |
| H3 by Uber | Turns H3 cells into hexagons | Apache 2.0 |
| FlatGeobuf | Reads FlatGeobuf files | BSD 3-Clause |
| TopoJSON | Reads and writes TopoJSON | ISC |
| SheetJS Community Edition | Reads spreadsheets | Apache 2.0 |
| d3 | Reads CSV, and projects shapes | ISC |
| polylabel | Places labels inside areas | ISC |
| polygon-clipping | Combines and splits areas | MIT |
| Flatbush and RBush | Find features quickly | ISC, MIT |
The app
| Project | What it does in squidmaps | License |
|---|---|---|
| React | The editor and the site’s interactive parts | MIT |
| Astro | The site, docs and published maps | MIT |
| Vite | Builds the editor and the site | MIT |
| Tailwind CSS | Styles | MIT |
| Radix UI | Menus, dialogs and popovers | MIT |
| CodeMirror | The JSON editor | MIT |
| Tiptap | Rich text editing | MIT |
| dnd kit | Drag and drop | MIT |
| Jotai and TanStack Query | Editor state and data loading | MIT |
| Comlink | Reads files off the main thread | Apache 2.0 |
| markdown-it | Renders descriptions | MIT |
| Fastify | The API | MIT |
| PostgreSQL | Stores maps | PostgreSQL License |
| Zod | Checks maps against the map spec | MIT |
| Playwright | Renders map thumbnails | Apache 2.0 |
| sharp | Processes images | Apache 2.0 |
These are the projects squidmaps relies on most. Each of them, and the many smaller packages they and squidmaps use, keeps its own copyright and license.
Something missing or credited wrong? Email [email protected].