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IMDF (Indoor Map Data Format) is an indoor mapping data format developed by Apple to provide indoor navigation and location information services. IMDF is based on the GeoJSON data format and can store information such as building structure, floors, facilities, entrances and exits, passages, POIs (points of interest) in a standardized form. This format is widely used in indoor map systems and applications such as Apple Maps, and plays an important role in GIS (Geographic Information System), facility management and smart city projects.

ESRI (Environmental Systems Research Institute) is a leading global provider of geographic information system (GIS) software, headquartered in California, USA. Founded in 1969, the company focuses on providing geospatial data collection, management, analysis and visualization solutions. ESRI’s products are widely used in urban planning, disaster management, environmental monitoring, transportation, agriculture, disaster prevention and other fields, and are widely adopted by government agencies, enterprises and research institutions around the world.

JP2 is the file extension of JPEG 2000, which indicates an image file compressed using the JPEG 2000 compression algorithm. JPEG 2000 is an improvement and extension of the traditional JPEG image compression algorithm, which uses a compression technology based on wavelet transform. This format plays an important role in digital image processing, providing an efficient and reliable way to store and transmit image data.

The full name of STEP is Standard for the Exchange of Product Model Data. It is an international standard 3D CAD data exchange format. The standard number is IS10303. STEP file is an internationally used 3D model data exchange format. The extension is usually step or .stp. It can share data between different CAD software, which is very convenient.

GDB file refers to the storage format of File Geodatabase, which is developed by Esri and used in its ArcGIS platform. It is one of the common spatial data management formats in the current Geographic Information System (GIS). File Geodatabase provides an efficient way to store, manage and query various spatial data. Unlike traditional single file storage, GDB file is a folder structure containing multiple files, which can store vector data, raster data and non-spatial table data.

**DBF **(DataBase File) is a file format for storing data, first introduced by the dBASE database system. It is widely used as a storage method for attribute data in GIS file formats such as Shapefile, and can record the non-spatial attribute information of each spatial element, facilitating data analysis and query.

LERC (Limited Error Raster Compression) is a lossless and lossy compression algorithm for raster data developed by ESRI. It is mainly used in GIS and remote sensing fields, and is optimized for raster data with continuous floating point or integer values. Unlike other image compression formats (JPEG, PNG, etc.), the goal of LERC is to “maximize the compression ratio while maintaining spatial accuracy.”

Autodesk Navisworks is a BIM integrated review software developed by Autodesk. It features the ability to integrate, validate, and simulate multiple 3D models (Revit, AutoCAD, Civil 3D, etc.) and is suitable for fields such as architecture, civil engineering, and plant design.

RST file, or reStructuredText file, is a lightweight markup language that uses simple markup syntax to write documents. It was first created and developed by David Goodger in 2002 and is mainly used for document writing and formatting. RST files usually have the extension “.rst” and use some specific symbols and structures to represent the various parts of the document, such as titles, lists, links, references, etc.

TPK (Tile Package) file is a file format for packaging raster or vector map tiles used by ESRI’s ArcGIS platform. It is mainly used for viewing maps offline or embedding maps in applications, and the extension is “.tpk”. Tiles are a collection of images that divide a map or aerial photo into different zoom levels, and TPK is a single compressed file containing all these images.