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OGC API - Tiles (formerly known as WMTS 2.0) is a new generation of geospatial data distribution API specification developed by the Open Geospatial Consortium (OGC). It is designed to replace the traditional WMTS (Web Map Tile Service) 1.0, adopts a RESTful API architecture, and supports modern Web technologies. The specification provides a standardized method to efficiently provide map tiles, image tiles, and 3D tiles (such as 3D Tiles format) to clients based on HTTP. It is worth mentioning that it has an extensible structure and is widely used in smart cities, urban modeling, geospatial analysis platforms and other fields.

OGC API - Coverages is a geospatial data service specification developed by the Open Geospatial Consortium (OGC), which aims to provide a standardized interface for continuous coverage data such as raster data and spatiotemporal grids. It defines how to access, query and process coverage data through a RESTful API, supports data types such as raster data band information and raster pixels, and is widely used in remote sensing, meteorology, oceanography and other fields.

ArcGIS REST API is a set of interfaces designed based on the REST architectural style for accessing and using the geospatial services published by ArcGIS Server. It allows users to obtain and operate various GIS resources on the server, such as map services, feature services, geometry services, etc., through URLs. Since ArcGIS Server 9.3, ArcGIS REST API has been providing services through which clients can access GIS services published on the server. For example, users can obtain the GIS service directory through a specific URL, or perform operations such as map output and query.

Mapbox API is a development interface provided by a powerful geolocation data platform, designed to help developers implement highly customized map display, geocoding, route planning, navigation, data visualization and other functions in their applications. Mapbox provides a series of flexible development tools and APIs, supports mainstream development environments such as Web, iOS, and Android, and facilitates developers to achieve a consistent map experience on different platforms.

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.

Bing Maps API is a map and location information service platform provided by Microsoft. It is aimed at developers and is used to integrate map display, route search, geocoding and other functions into web applications or mobile applications. It is as famous as Google Maps API and is widely used in enterprises and business systems.

HERE Maps API is a set of map and location service APIs provided by HERE Technologies, a company headquartered in Germany. It is widely used in web applications, mobile apps and enterprise systems, and is mainly used to implement map display, route navigation, location search, geocoding, traffic information and other functions. With high-precision map data and real-time traffic information, it has been widely used in the automotive industry, logistics, smart city development and other fields.

Cesium Terrain Service is a server designed for Cesium.js. It is used to easily provide file system-based terrain tilesets. It supports working with CesiumTerrainProvider class of Cesium.js to render high-precision terrain data in the browser. It uses binary file structure to store terrain data. Based on Quantized Mesh technology, it reduces data storage space through compression and quantization processing, and improves loading and rendering performance. The service supports on-demand data loading, dynamically loads terrain slices of different resolutions according to user views, adapts to different levels of view requirements, and ensures efficient terrain loading.

OpenTopography API is a RESTful web service interface for developers, through which developers can access global DEM (digital elevation model) datasets hosted by OpenTopography, such as Copernicus GL30, NASA DEM, SRTM, etc. The API is documented using the OpenAPI specification and can be visualized and tested through Swagger. Users need to register through the OpenTopography portal and obtain an API key to authenticate when accessing the API.

Sentinel Hub is a cloud API platform for satellite imagery operated by the European Space Agency (ESA). It supports the Sentinel series of satellites (such as Sentinel-1, Sentinel-2, Sentinel-3, etc.), as well as other data sources such as Landsat and MODIS. The platform uses APIs to enhance access to satellite data. Users can process data of interest through its APIs and access these data in the required format to obtain analysis-ready data (ARD) without additional cleanup. Sentinel Hub provides functions such as EO Browser (interactive visualization tool) and Custom Script (JavaScript-based API, which can customize algorithms for batch processing of data), supports OGC services (such as WMS/WMTS/WCS protocols), and can be integrated into GIS software (such as QGIS).