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Ordnance Survey OS Data Hub API is a cloud-based geospatial data delivery service provided by Ordnance Survey (OS), the national mapping agency of Great Britain. It offers OS's high-precision geographic data (mapping, addresses, road networks, administrative areas, topography, etc.) as a RESTful API that can be directly integrated into web and mobile applications for real-time use. In an authenticated environment, developers can access various GIS datasets and efficiently incorporate functions such as map display, spatial analysis, route calculation, and statistical aggregation.

GeoNames Web Services is a suite of RESTful web services that provide programmatic access to the GeoNames geographical database, one of the world's largest free geographic name repositories. Launched in 2006 by Marc Wick, the GeoNames project contains over 11 million unique geographical features and 5.5 million alternate names across approximately 200 languages . The web services offer functionality including full-text search, reverse geocoding (converting coordinates to place names), postal code lookup, and Wikipedia article integration. All data is available under a Creative Commons Attribution license, making it accessible for both free and commercial applications. The services are widely used in mapping applications, logistics tracking, travel planning, and GIS analysis.

The NOAA NCEI API (National Centers for Environmental Information API) is a climate, ocean, and geographic data access service provided by the U.S. National Oceanic and Atmospheric Administration (NOAA). It offers a unified interface for obtaining and analyzing a wide variety of geospatial and environmental data, including temperature, precipitation, sea surface temperature, meteorological observations, and climate change indicators. Through the API, researchers, data scientists, and policymakers can efficiently retrieve both real‑time and historical data for use in diverse fields such as climate modeling, environmental assessment, and disaster prediction.

The OpenSky Network API is an open API platform that collects and provides real-time flight data for commercial aircraft and drones. It offers information such as aircraft positions, altitude, speed, flight paths, and identification numbers, and can be used for air traffic monitoring, flight analysis, and research purposes. Data is collected through sensors and the ADS-B (Automatic Dependent Surveillance–Broadcast) network, and developers and researchers can easily access it via a RESTful API. This enables a wide range of applications, including visualization of air traffic conditions, flight pattern analysis, airspace management, and safety monitoring.

Nextzen / Mapzen Turn-by-Turn API is an open-source navigation service that supports multiple modes of transportation including car, bicycle, walking, and public transit. It is used to integrate route planning, navigation instructions, and travel time estimation into web or mobile applications. It provides dynamic route calculation and real-time navigation capabilities, allowing developers to implement draggable waypoints and obtain text-based navigation instructions in Leaflet maps via plugins such as lrm-mapzen. Since the Mapzen service has been shut down, Nextzen, as its successor, offers a similar API integration solution, including routing and map data services.

Cesium Ion API is a cloud interface service provided by the Cesium platform for accessing its hosted global geospatial data, such as high-precision terrain, imagery, and 3D models. It uses an Access Token for authentication, allowing developers to call this API within their applications to quickly load high-quality 3D geographic data and achieve immersive globe visualization. It also supports users in uploading and managing their own spatial data assets, which can then be published and shared via the API.

Gaode LBS Cloud is a spatiotemporal intelligence platform for the industrial sector under the Gaode Map brand. Leveraging the "Yunrui" spatiotemporal industry large model and the "Yunjing" 3D reconstruction platform, it provides intelligent solutions based on spatiotemporal data for industries such as offline retail, transportation, logistics, energy, and finance. Integrating AI with spatial intelligence technologies, it supports dynamic 3D urban reconstruction and intelligent decision-making, helping enterprises achieve full-chain digital upgrades in site selection, operations, and dispatching. Starting in 2024, the platform has fully opened its development capabilities and has established its first Spatiotemporal Smart City Operations Center in Quzhou.

Tencent Maps API (Tencent Map Location Service Platform) is a location service interface provided by Tencent. Developers can call its capabilities for mapping, positioning, route planning, place search, etc., via multiple technical platforms such as JavaScript, Android, and iOS, enabling rapid integration of map functionality into applications or websites. The API supports free Key application with no call frequency limits and is widely used in industries such as mobility, logistics, and retail, offering high-precision positioning, real-time traffic conditions, reverse geocoding, and a wealth of other features. The platform also provides visualization tools and data services to support enterprise digital transformation.

Alibaba Cloud AMap (AutoNavi) Open Platform API is a standardized set of location service interfaces provided by Alibaba Group. It integrates core capabilities such as map display, geocoding, route planning, real-time traffic conditions, place search, positioning, and weather queries. The API supports integration across multiple platforms including Web, Android, iOS, and HarmonyOS, allowing developers to embed high-precision geographic information and intelligent navigation capabilities into various applications. Underpinned by Alibaba Cloud infrastructure, it ensures stable performance under high global concurrency and is widely used in digital scenarios such as mobility, logistics, smart hardware, and e-commerce.

Azure Maps API is a set of geospatial services provided by the Microsoft Azure cloud platform. Through REST APIs and a Web SDK, it offers developers capabilities such as map rendering, geocoding, location search, route planning, real-time traffic conditions, time zone information, geolocation services, and weather data integration. It helps build intelligent location solutions for web and mobile applications and is widely used in logistics, asset tracking, IoT monitoring, and mobility services.