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. i3DM files typically contain 3D models of geospatial data, which can be buildings, trees, vehicles, etc., for visualization and analysis on virtual Earth platforms or other 3D geographic information systems.
The. idmm 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.
The. idmm format supports model instantiation, which means that the same model can be used multiple times in the file without the need to store geometric information and texture maps repeatedly, thereby reducing the file size.
The. i3DM 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. idmm 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.