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CesiumJS 1.55 is Here with Faster Imagery and Terrain

We are happy to announce the release of Cesium 1.55.

As part of this release, we’ve revamped terrain and imagery rendering, resulting in terrain and imagery loading an average of 33% faster (with some scenes loading twice as fast!) and streaming an average of 33% less data.

Mount Olympus, UT, with Cesium World Terrain.

Highlights include:

  • Updated terrain and imagery rendering, resulting in terrain/imagery loading ~33% faster and using ~33% less data
  • Added CZML arcType support for polyline and polygon
  • Fixed an issue where polygons on terrain using rhumb lines where being rendered incorrectly

For the full list of changes, see the change log.

CesiumJS 1.79.1
57 MB | Mar 01, 2021


  • The OGC adopted 3D Tiles as a Community Standard for streaming massive 3D content! This will accelerate the adoption of 3D Tiles and the growth of its supporting ecosystem, including improved data pipelines and visualization optimizations in Cesium.



  • FOSS4G NA is next month, April 15–18. Get in touch if you’d like to demo your Cesium or 3D Tiles work at our booth.


We have a new showcase up on our demos page.