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JPEG (Joint Photographic Experts Group) is a file format widely used for digital image compression, with the extension “.jpg” or “.jpeg”. It was developed by the Joint Photographic Experts Group established in 1986 and was officially adopted as an international standard (ISO/IEC 10918-1) in 1992. JPEG mainly uses lossy compression, which can significantly reduce the size of image files with a high compression rate. Therefore, it is widely used in digital cameras, websites, social media and other fields.

In GIS, a Coverage file is a data type used to represent a continuous area, usually composed of multiple grid cells spliced together. Each cell can contain one or more attributes, such as height, temperature, or land use type.

BMP file (bitmap file, extension: .bmp) is a file format for storing bitmap images, developed by Microsoft. It is widely used as a standard image format in Windows environment, mainly used to process uncompressed raster images. Since BMP files store each pixel data of the image as it is, they can display high-quality and lossless images, but the file size is often large.

KML (Keyhole Markup Language) is an XML-based file format used to describe and store geographic information data (such as points, lines, surfaces, polygons, polyhedra, and models).

Baidu Coordinate System (BD09), also known as Baidu Coordinate System, is a coordinate system developed by Baidu to meet the special needs of geographic information systems in mainland China. It is encrypted based on the WGS84 coordinate system (World Geodetic System 1984) to ensure accurate geographic positioning services within mainland China.

SketchUp is a 3D modeling software developed by Trimble, with the core concept of “making 3D modeling as natural as sketching with a pencil”. It significantly lowers the threshold of 3D design through a minimalist interface and intuitive push-pull modeling tools (such as drawing lines to create surfaces and extruding to create bodies), and is suitable for quickly building solution prototypes in the fields of architecture, interior design, and landscape. Its unique advantage lies in the balance between professionalism and ease of use. 80% of users can master basic operations within 3 hours.

**WP **files are a specific file format for managing and displaying 3D tile data and spatial information. This format is mainly used in geographic information systems (GIS) and 3D visualization platforms, and is designed to efficiently display and distribute large-scale geographic data and city models. WP files store sliced 3D models and texture information, and are suitable for managing and distributing large-scale geographic data sets. Especially in Web-based geographic information visualization and real-time rendering, WP files are widely used due to their lightweight and high-speed display characteristics.

HDR is the abbreviation of High Dynamic Range, which is an image technology that aims to present richer and more realistic visual effects by expanding the dynamic range of images.

ETRS89 is the reference coordinate system for measurement and geographic information in Europe. Its goal is to establish a unified spatial reference frame across Europe.

HDF (Hierarchical Data Format) is a file format used to store and manage large scientific data sets. It is a container for multidimensional arrays and complex data structures, and is widely used in science, engineering, and research. It can store many types of data, including numerical values, images, audio, text, etc. It supports hierarchical structures, allowing data sets to be stored and accessed in a multi-level organizational manner, facilitating data organization, retrieval, and analysis.