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Google Maps API is a service provided by Google that integrates online maps and geospatial data. It allows map functions to be embedded in websites and mobile applications, and is a powerful developer tool that can be used to display geographic information in a visual and interactive way.

PNG (Portable Network Graphics) is a commonly used image file format that is also widely used in GIS. It is a lossless compressed bitmap image format designed to replace the older GIF format. It supports 256 colors and transparency, and can be edited and saved multiple times without losing image quality. PNG files can store high-quality images with small file sizes and good image details.

BSQ (Band Sequential) is a file format for storing multi-band raster data, which is widely used in remote sensing, geographic information system (GIS), image processing and other fields. BSQ is a format that stores data in band order. The data of each band is arranged in a linear manner, and the storage structure is simple and efficient.

GeoJSON is a geospatial data format based on the JSON (JavaScript Object Notation) standard, used to represent simple geographic features and their attributes. It stores geographic data (such as points, lines, polygons, etc.) together with related attribute information, and is widely used in Web map services, GIS (Geographic Information System), data visualization, and geographic data exchange.

In GIS, SXD refers to the ArcGIS Desktop archive file format. SXD files are a file format that stores symbol styles and rendering settings used in ArcGIS Desktop. They contain map element styles, colors, symbols, labels, and other display attribute information, and are used to quickly apply the same style settings to other map layers and projects. SXD files allow map styles to be easily shared and reused, improving efficiency and consistency in cartography.

IMG file is an image data file format developed by ERDAS IMAGINE software, designed for remote sensing image and geospatial data processing. As a flexible and widely supported raster data format, IMG is widely used in remote sensing, geographic information system (GIS), land cover analysis and other fields.

Mollweide Projection is an equal-area pseudocylindrical projection proposed by German mathematician Karl Brandan Mollweide in 1805. The projection maps the earth’s surface onto a flat surface through mathematical transformation, aiming to maintain the accuracy of area ratio while minimizing the distortion of shape and direction. The central meridian of the Mollweide projection is a straight line, the other meridians are symmetrical elliptical arcs, the parallels are parallel straight lines, and the length of the equator is twice the length of the central meridian.

Stereographic projection is a method of projecting points on the surface of the earth or sphere from a certain point (usually a pole) of the sphere onto a plane. This projection method distributes points on the sphere and projects them from a certain point to the projection plane opposite it, and finally presents them in the form of a circular map. This method was invented by ancient Greek mathematicians and is widely used in many fields such as astronomy, crystallography and map making.

WT file is a tile data format mainly used for 3D tile maps and geographic information systems (GIS), designed for efficient display and distribution of large-scale geospatial data. This file format is the abbreviation of Web Tile and is widely used in web-based 3D visualization platforms and geospatial applications. Especially in GIS platforms such as Wings Engine, the WT format is adopted to efficiently distribute large-scale 3D city models and geospatial data.

LYRX files are project file formats used in ArcGIS Pro software. They are the core files of ArcGIS Pro projects, which store project configuration information, map layers, toolboxes, layouts, styles, and other related resources. Through LYRX files, users can save and share the entire GIS project, including map, data, analysis, and geoprocessing tool settings.