search

geo-data / cesium-terrain-builder

A C++ library and associated command line tools designed to create terrain tiles for use in the Cesium JavaScript library
Other
706 stars 338 forks source link

Possibility to merge several regions with different resolutions? #97

Closed lukey78 closed 2 years ago

lukey78 commented 3 years ago

In the process of building a global terrain model, I have the whole world in low resolution (30-50m) and some regions in much higher resolutions. Does anyone know of a good way to create the terrain tiles for something like this without continously running into "integer overflow" or memory errors?

I thought that it could be possible to generate the quantized mesh tiles for certain regions (e.g. a single country), which also creates the layer.json file perfectly.

I thought I could do this for each country I have better resolutions available, and then merge this with the terrain generated with a "global" low-res DEM.

Is it possible to merge individually generated terrain files (and layer.json files) into a new one?

Currently, if I have a workflow for building all meshes for the whole world (by using VRT etc.) it may happen that the server calculates for 14 days and then crashes at 80% or so. Generating individual regions and merge them later might be a better option.

BWibo commented 3 years ago

This might contain some helpful advice: https://github.com/tum-gis/cesium-terrain-builder-docker/issues/3