Re:Earth Buildings is an open 3D building tile service built from Overture Maps and Re:Earth Terrain. Just point any 3D Tiles 1.1 compatible client (such as Cesium) at the URL below to use it.

3D Tiles URL

https://buildings.reearth.land/tileset.json

Sample code (Cesium)

import * as Cesium from "cesium";

const viewer = new Cesium.Viewer("app");

const buildings = await Cesium.Cesium3DTileset.fromUrl(
  "https://buildings.reearth.land/tileset.json",
);
viewer.scene.primitives.add(buildings);

// Recommended: pair with Re:Earth Terrain so building footprints sit cleanly on the ground.
viewer.scene.setTerrain(
  new Cesium.Terrain(
    Cesium.CesiumTerrainProvider.fromUrl(
      "https://terrain.reearth.land/cesium-mesh/ellipsoid",
      { requestVertexNormals: true },
    ),
  ),
);

Attribution (required)

ODbL 1.0 requires you to display the attribution below somewhere when the data is shown. Most clients (including Cesium) surface asset.copyright from tileset.json automatically; if yours doesn't, add it to your credits manually.

Buildings: Re:Earth Buildings, OpenStreetMap contributors, Overture Maps Foundation (ODbL).
Terrain: Re:Earth Terrain, Mapterhorn.

Operated by Eukarya Inc. as part of the Re:Earth ecosystem.

Heights: where the source data provides a height we use it; otherwise we estimate one from footprint area, neighbours, and land use. Estimated heights are plausible but not accurate — don't use them for analysis that depends on real building dimensions.

Note: this is a best-effort community service with no SLA or uptime guarantee. Use at your own risk, and please don't rely on it for production traffic without hosting your own mirror.

For the full spec, attribute schema, and license details, see the README. Curious how the tiles are built on demand? Read this post.