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Question

Extend custom raster-tif terrain to avoid cliff

  • March 5, 2026
  • 1 reply
  • 51 views

krispersson
Participant
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I am loading a small raster/tiff into CesiumJS via ion for a limited area of interest, which works, but I am getting a sharp “cliff” between this raster and the surrounding Cesium-terrain (I assume it is the Ellipsoid, it sits at roughly 35m above MSL). My initial idea was to see if I can “lift” the surrounding terrain up to the level of my custom raster-tif, but I guess that’s not possible, so my second idea is to expand my raster to continue outward at a set height (say 80m) for a few hundred meters instead to better mask the impression of the vertical cliff, and maybe have it ramp downhill until it meets the default terrain. However, I have no idea how to do this in FME, and ChatGPT is hallucinating around FME as per usual :)
Does anyone have an idea of a solution for this? Ultimately, I just want something nicer than the sharp cliff a la Grand Canyon into something that is not too distracting for users. I’ll include a screenshot of my Cesium-app the way it looks in the browser, as well as the raster’s Record Information from FME.



 

1 reply

dmitribagh
Safer
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  • Safer
  • March 9, 2026

Hi ​@krispersson,

 

Maybe the easiest solution is to use “Terrain TIles on AWS” reader, which is a free global DEM dataset. You can use the extents of your data to get a few tiles covering your area and extend the coverage you need as much as you want.

If you have any questions about using this reader, feel free to reach out to me at dmitri@safe.com

Dmitri