Terrain Viewer · docs
Terrain & historical imagery, in the browser
Hillshade, hypsometric tint, contours and relief visualization from any elevation source, and decades of satellite imagery on one timeline. MapLibre GL, nothing to install.
Demo video
Slope and hypsometric tint over Mont Blanc, then the Champ de Mars across fifteen years of imagery.
Terrain Visualization Modes
Hillshade, hypsometric tinting, contours, slope/aspect/curvature, TRI/TPI/roughness, LRM, Sky-View Factor, Openness, and mound (tell) detection.
Light-Direction XYPad
Drag a 2D pad to set Hillshade/Phong illumination azimuth and elevation together, bound to real sun position and day/night constraints.
Historical Imagery
Browse decades of historical satellite imagery (Wayback, HLS, Google Earth Historical, Planet) along a draggable timeline, per view.
Split Screen & N-Map Compare
Side-by-side, overlay/blend, or up to an 8-view grid to compare terrain sources, basemaps, or historical dates against each other.
Every view is a shareable link
Viewport, sources, and every visualization setting live in the URL — copy the address bar to reproduce the exact same view for anyone else, or save it as a bookmark.
Get Started