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**AUX file (Auxiliary File) **is a file used in GIS (Geographic Information System) to store auxiliary information (such as spatial index, attribute index, metadata, etc.) of geographic datasets, aiming to improve the efficiency of spatial query and analysis.

WOR files are file formats used to store workspaces in MapInfo Professional geographic information system (GIS) software, and their extension is .wor. They do not store geographic data directly, but record map hierarchy, style setting information, and data source paths, which are used to quickly reproduce map layouts and analysis views in specific GIS projects.

Vector data is data that uses x and y coordinates to represent the location and shape of map graphics or geographic entities in rectangular coordinates. Vector data generally records the coordinates to accurately represent the spatial location of geographic entities as much as possible.

AutoCAD is a widely used software in the field of computer-aided design (CAD), developed by Autodesk. It provides a wealth of design and drawing tools that can be used to create and edit 2D and 3D graphics.

VTPK (Vector Tile Package) is a vector tile data format proposed by Esri. It is built based on vector data compression and slicing technology. It realizes efficient storage and transmission by decomposing geospatial data into multi-level pyramid structured vector tiles (PBF format). Its core features include multi-resolution support, vector data-based compression algorithm, cross-platform compatibility and offline use capability. It is suitable for mobile navigation, geographic information collection, outdoor survey and other scenarios.

STYLX (ArcGIS Style File) is a style file format used by Esri’s GIS software (such as ArcGIS Pro and ArcGIS Online). It contains style elements such as map symbols, labels, color settings, font information, fill patterns, etc., which are used to unify and manage the visual presentation of the map. STYLX files can be created and edited through the “Style Manager” of ArcGIS Pro, and can merge multiple symbols into one file to maintain the consistency of map design and facilitate sharing and reuse.

Revit files are design files created using Revit, a BIM (Building Information Modeling) software developed by Autodesk. It is unique in its ability to integrate and manage 3D models and design information used in the fields of architecture, structure, and engineering (MEP). It is widely used in the construction industry around the world and is a core component of the BIM workflow that covers the entire life cycle from building design to construction and maintenance.

SL3 (Spatialite Version 3 Database File) file format is a SQLite database file with the extension .SL3, which contains spatial data tables and related spatial indexes. It uses the file structure and data organization of the SQLite database, and adds the functions of spatial data storage and query on this basis.

IFC (Industry Foundation Classes) is an open BIM (Building Information Modeling) file format widely used in the construction industry. The IFC format was developed by buildingSMART, an international building standards organization, to promote data sharing and collaboration between different software tools in the construction industry. It is an open standard for describing all relevant data and information in construction and building engineering projects, such as buildings, equipment, structures, materials, etc. This allows information in the building design, engineering and construction process to flow seamlessly between different software.

TAB file is a file format used to describe geographic spatial data. It is usually a logical “data table”, but it not only contains tabular data, but also links to other files to provide spatial reference and geometric data. It is the main format for MapInfo software to read and write spatial data. It is suitable for storing vector data types such as points, lines, polygons, and can support topological structures and coordinate information. It is widely used in the GIS industry for its good structure and powerful functions, and can store spatial data and related attribute data.