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VTP stands for Virtual Terrain Project and is an open source terrain rendering, computing and storage system. It provides a complete set of tools and libraries for creating, editing, rendering and analyzing Digital Terrain Models (DTMs) and related geographic information data.
The file format of VTP adopts XML and binary forms. It can store various types of geographic information data such as elevation data, texture data, vector data, etc. It supports multi-layer representation of terrain, that is, each layer contains a specific type of data.
In addition to file formats, VTP also provides a series of visualization tools, such as OpenGL-based 3D rendering engines, DEM/DTM analysis tools, map editors, etc., to facilitate users to visualize terrain and Data Analysis operations.
The 3MF file is a modern 3D file format designed specifically for 3D printable models (additive manufacturing). It aims to be the successor to the popular traditional STL format (also a common format in 3D printing) to overcome its limitations.
The 3MF file format is based on XML and is compressed using standard Zip file compression to generate small, easy-to-transfer files. The format supports 3D meshes as well as all related materials and textures contained in the Zip file.