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. b3DM files typically contain geospatial data such as buildings, terrain, vegetation, etc. These data exist in the form of 3D models and can be visualized and analyzed on virtual Earth platforms or other 3D geographic information systems.
The. b3DM file stores data in binary format, which makes it more efficient and can accommodate a large amount of geometric information, texture maps, and other attribute data.
. b3DM files typically use compression algorithms to reduce file size and improve transmission efficiency. Common compression algorithms include glTF Draco compression based on Magic Number and quantization compression.
The. b3DM format is widely used in fields such as virtual earth platforms, GIS software, and game development. For example, the 3D Tileset format in CesiumJS is based on. b3mm files, used to present large-scale geospatial data in web browsers.
The PLY format is a 3D model format developed and released in 1994, primarily used to store 3D data from 3D digital scanners. The format, also known as the Polygon File Format and Stanford Triangle Format, can be either binary or text-based.
The file format stores 3D geometric information, such as vertices, faces, vertex normals, colors, and other custom data. Many PLY models still use this format, available for download, and PLY files can be loaded into popular 3D applications such as Blender.