InfoTwin – 3D City Mapping
An interactive 3D map built with MapLibre GL JS, using free OpenFreeMap vector tiles and public AWS elevation data — no API key required. Use the panel in the top-left to switch basemaps, toggle terrain and 3D buildings, jump to preset locations around Cologne, or add your own GeoJSON/image data. Drag to pan, right-click-drag (or two-finger drag) to tilt and rotate.
Search location
Basemap
Custom basemap (TMS)
Swipe compare
Pick two layers and drag the slider to compare them side by side.
View
Raster layers are automatically draped over the 3D terrain surface.
LoD2 buildings (NRW)
Photorealistic mesh (NRW)
Go to
Flood AOI (Rasuwa)
HOT flood-mapping corridor, Rasuwa district (~90 km², 200m river buffer). Use “+ Add data” below to load the exact boundary GeoJSON as an overlay.
Layers
WMS layer
WFS layer