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• Google Earth — Global 3D imagery and satellite data
• Google Earth Pro — Desktop version with advanced tools
• Sentinel Hub — Access free Sentinel satellite imagery
• Sentinel Playground — Explore Sentinel imagery interactively
• EO Browser — Browser-based access to Sentinel imagery
• NASA Worldview — Daily global satellite data
• USGS EarthExplorer — Access historical satellite imagery
• ESA Copernicus Open Access — Sentinel mission data access
• NOAA Satellite Data — US environmental satellite imagery
• Satellites.pro — Online satellite maps viewer
• Mapbox Near-Time Imagery — Near real-time satellite maps
• GIS Geography: 25 Satellite Maps — Guide to alternative satellite maps
• Wayback Imagery — Historic satellite imagery archive
• Maxar Discovery — High-resolution imagery archive
• Soar.Earth — User-uploaded and satellite imagery platform

• Apple Maps - Map service by Apple
• Baidu Maps - Map service by Baidu
• Bing Maps — Microsoft’s mapping solution
• GoKML — Online KML maps
• Google Maps — Standard mapping and geolocation platform
• Google Street View — Ground-level panoramas worldwide
• Instant Streetview - Instant Google Street View
• Mapillary — Crowdsourced street-level imagery
• NearToilets - Find clean public toilets
• OpenSeaMap - The Open Sea Map
• OpenStreetMap — Community-driven world map
• Open Infra Map - View of the world's infrastructure mapped in OSM
• HERE WeGo — Mapping and routing platform
• Wikimapia — Collaborative map with user-added info
• Yandex Maps - Map service by Yandex

• GeoSpy.ai - Locates images through AI pixel analysis. Not publicly available
• Picarta - Locates images through AI EXIF data / algorithms
• TIB Labs - Uses deep learning / scene classification to determine country/location
• Findthatspot - Using OSM to locate features for Geolocation
• PeakFinder — Identify mountains and terrain from coordinates
• PeakVisor - same as above

• Space-Track.org — US Space Command satellite data
• N2YO — Real-time satellite tracking
• Heavens Above — Satellite, ISS, and astronomy tracking
• SatNOGS — Open-source satellite ground station network
• Celestrak — Orbital data for satellites and debris
• In-The-Sky Satellite Maps — Interactive orbital maps

• ShadeMap - Sunlight simulation on OSM instance
• ShadowMap - Sunlight simulation on 3d map
• SunCalc — Calculate sun position and shadows for a given time
• SunEarthTools - Sun position tracking
• BellingCat Shadowfinder - Estimating the points on the Earth's surface where a shadow of a particular length could occur

• QGIS — Open-source desktop GIS application
• ArcGIS Online — Cloud-based mapping and spatial analysis
• Gephi — Visualization and spatial network analysis