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PRWM is an abbreviation for "Point Cloud Remote-Sensing Data Web Map Service" and is a format for point cloud remote data services. It was developed by the US Geological Survey (USGS) to transfer, store and share point cloud data in a web environment. The PRWM format is based on the existing Web Map Service (WMS) standard, but is optimized for point cloud data. It can handle large-scale point cloud data well, supports multiple data types, and provides efficient data compression and network transmission capabilities. With the PRWM service, users can seamlessly access and use point cloud data on the web platform without downloading and importing data in the traditional way. This greatly reduces the cost and time of data usage, and also provides more possibilities for point cloud data sharing and communication.
Draco is a glTF extension for mesh compression, an open source library developed by Google for compressing and decompressing 3D meshes to significantly reduce the size of 3D content. It compresses vertex positions, normals, colors, texture coordinates, and any other general vertex properties, increasing the efficiency and speed of transferring 3D content on the web.