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JGD2000 is the national surveying system of Japan officially adopted by the Geospatial Information Authority of Japan in April 2002, replacing the previous “Tokyo Datum”. The main purpose of its introduction is to enhance the coordination with the global GPS coordinate system. JGD2000 is based on the geocentric coordinate system (ITRF: International Terrestrial Reference Frame) with the center of the earth as the origin, thus achieving higher-precision measurement and GIS analysis capabilities.

DWG (Drawing) files are a standard format for CAD (Computer-Aided Design) data developed by Autodesk. This format is widely used in architectural design, engineering, manufacturing and other fields, and is compatible with Autodesk’s AutoCAD and many other CAD software. DWG files contain 2D graphic data, 3D model data, layer information, dimensions, annotations, block information, etc., which can efficiently store and manage accurate design data. Since DWG is stored in binary format, the file size is small and the processing speed is fast, which is one of its main features.

XML (Extensible Markup Language) is a markup language used to describe and store structured data. Its tag structure is similar to HTML, but its purpose is specifically for expressing and exchanging data, and users can define their own tags. It is mainly used for data integration between systems, setting files, configuration information, etc.

GPF-DIME is a file format used to manage and store remote sensing image data and other geospatial data. It is mainly used for the storage, processing and transmission of remote sensing images. By providing a flexible and efficient data structure, this format allows users to use it to store and process images in different environments, especially when processing large-scale, high-resolution image data.

SuperMap is developed by Beijing SuperMap Software Co., Ltd. It combines spatial data processing, geographic information visualization and powerful spatial analysis functions. SuperMap mainly consists of four parts: desktop tools (SuperMap Desktop), secondary development components (SuperMap Objects), network development tools (SuperMapIS .NET) and embedded development tools (eSuperMap).

MID files are part of the data format used by MapInfo (Map Information), a GIS software. MapInfo is a software used to process geographic information and is widely used in commercial GIS, urban planning, geographic analysis and other fields. MID files are used in conjunction with corresponding MIF (MapInfo Interchange Format) files to store attribute information of GIS data.

SDE (Spatial Database Engine) is a software component used to manage and store geospatial data. SDE is a technology developed by Esri that is used to interact with geographic database systems and provide efficient management, query, and editing of spatial data.

PIX (PCI Geomatics Database File) is a file format used to store and process image and raster data. The PIX format is often used to process remote sensing data, such as satellite images, digital elevation models, and meteorological data. It is a binary format that can store multi-channel, multi-resolution data, supports image compression, and can store metadata and geospatial information.

A projected coordinate system is a plane coordinate system whose map units are usually meters or kilometers. It is obtained from the projection of the earth’s approximate ellipsoid and corresponds to a geographic coordinate system. A projected coordinate system uses a coordinate system based on X and Y values to describe the location of a point on the earth.

WL files usually stand for Workspace Files, which play an important role in saving and managing geographic data and related settings in MapGIS. They help users maintain the consistency of their work status and provide convenient data access and analysis functions.