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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 OBJ file format is a file format used to describe three-dimensional objects. It consists of a series of vertices, faces, and texture coordinates, which can describe the shape, texture, and other properties of an object. The OBJ file format is commonly used in 3D modeling and computer-aided design (CAD) software, where three-dimensional models can be exported as OBJ files for further processing and manufacturing. The OBJ file format is simple and easy to use, making it widely used in various fields. The OBJ file format also supports multiple color spaces, including sRGB, Adobe RGB, and grayscale. OBJ files can be created and edited using many different applications, including Blender, Maya, and 3ds Max. In summary, the OBJ file format is a widely used file format in 3D modeling and computer-aided design (CAD) software, which can describe the shape, texture, and other properties of an object.