Tools developed for manipulating 3DTile datasets
If you need tco manipulate the data inside .b3dm files, you first need to convert them to .glb, this tool does that.
Also the 1.1 spec for 3D Tiles now uses glb as the default format, so going forward you should be using glb anyways.
This tool will convert an entire tileset from .b3dm to .glb.
You may be wondering why this tool even exists considering that this functionality already exists in the CesiumGS 3d tiles tools.
The reason is performance.
Using the Cesium nodeJS tool takes about 1 minute to convert 279 .b3dm files to .glb
The python tool provided will process over 50,000 .b3dm files in just over 11 seconds.
Usage
python b3dm2glb-tileset_convert.py folder_containing_tileset.json
How it works
The code will scan the folder you specified recursively looking for .b3dm files and .json files.
- When it finds a
.b3dmfile, it will convert it to.glb - When it finds a
.jsonfile, it will do a find/replace for all references of.b3dmand replace them with.glb
When geo-tiff files are converted to tiled format, png files are generate. However png files lack visual data compression and the resulting files are large which in turn make the means large datasets need to be transferred over the web (longer wait times to load tiles)
Dependencies
Need to have installed imagemagick, webp and parallel (to allow bash to run multithreaded processes)
Usage
./compress-webp.sh <source_folder> <destination_folder>
How it works
The compress-webp script will scan all recursively scan all the folders looking for png file. The 'png' files are converted to 'webp' format.
After all the png files are converted, the script copies the 'tilemapresource.xml' file from the original folder to the destination folder and modifies the file 'tilemapresource.xml' file to replace the text 'png' with 'webp'.