Attribution
RIDGELY 3D is built on the work of open data communities and open-source projects. The sources below make our terrain tiles possible.
Map data
OpenStreetMap
Place names, roads, water, and base geography are © OpenStreetMap contributors, available under the Open Database License (ODbL).
Map tiles
OpenTopoMap
Topographic map tiles rendered by OpenTopoMap, licensed under CC-BY-SA 3.0.
Elevation data
Mapterhorn terrain tiles
Global heightmaps are read from Mapterhorn's open Terrarium-encoded terrain tiles, which combine public elevation datasets such as Copernicus GLO-30 and NASA SRTM.
Environment Agency LIDAR (UK)
Within England, higher-resolution detail comes from the Environment Agency LIDAR Composite Digital Terrain Model (1 m), used under the Open Government Licence v3.0.
Greenery, water & features
Overpass API
Woodland, water and other landcover used to colour the tiles is queried from OpenStreetMap through public Overpass API mirrors.
Geocoding & search
Nominatim
Location search is powered by Nominatim, a geocoder built on OpenStreetMap data.
Libraries
Leaflet
Interactive maps are rendered with Leaflet, an open-source JavaScript mapping library (BSD-2-Clause).
proj4js & geotiff.js
British National Grid conversion and reading of LIDAR GeoTIFF data use proj4js (MIT) and geotiff.js (MIT).
If we've missed a source you believe should be credited here, please get in touch.