🛰️ SPACE (4 sources)
CelesTrak NORAD TLE
FREESatellite orbital elements (TLE format) from NORAD catalog
Max 100 satellites per request, cache delays up to 4 hours
NASA GIBS - VIIRS
FREEVIIRS satellite imagery layer from NASA Worldview
Imagery delayed ~24 hours, cloud cover obscures surface
NASA GIBS - MODIS
FREEMODIS true-color and false-color satellite imagery
Imagery delayed ~24 hours, lower resolution than commercial
NASA GIBS - Black Marble
FREENighttime lights composite imagery from VIIRS DNB
Static 2016 composite, not real-time
✈️ SKY (6 sources)
Airplanes.live
commercialFREEReal-time commercial aircraft positions via ADS-B network
Coverage gaps in oceanic/remote areas, rate limits apply
ADSB.lol
commercialFREECommunity ADS-B aggregator (fallback for Airplanes.live)
Smaller feeder network, may have fewer aircraft
Airplanes.live /mil
militaryFREEMilitary aircraft positions filtered from ADS-B network
Only aircraft with active transponders; many mil flights are dark
ADSB.lol /mil
militaryFREEMilitary aircraft fallback via community ADS-B network
Smaller feeder network than Airplanes.live
Iowa State NEXRAD
weatherFREENEXRAD weather radar composites from Iowa Environmental Mesonet
USA coverage only, WMS tile requests can be slow
RainViewer
weatherFREEGlobal precipitation radar composites
Coverage weaker in Africa/South America, 10-min delay
🌍 EARTH (11 sources)
USGS Earthquake Feed
FREEReal-time earthquake events magnitude 2.5+ worldwide
Only M2.5+; minor quakes not included
GDELT GEO API
FREEGlobal news events geolocated via GDELT Project
Geolocation is approximate; high volume of events
Toronto Open Data CKAN
FREECity of Toronto traffic camera (CCTV) locations and feeds
Toronto municipal area only; camera feeds may be offline
Google Maps Traffic
FREEUnofficial traffic flow tile overlay from Google Maps
Unofficial/undocumented endpoint; may break without notice
Flickr API
FREEGeotagged photographs from Flickr community
Rate limited to 3600 req/hr; requires API key
Wikimedia Commons
FREELandmark and geotagged photos from Wikimedia
Rate limited; not all images are geotagged
Tor Project Exit List
cyberFREEKnown Tor exit relay IP addresses for cyber threat mapping
Exit nodes only; does not cover bridge/guard relays
ip-api.com
cyberFREEIP geolocation service for mapping network addresses
Free tier: 45 req/min; no HTTPS on free plan
Element84 Earth Search
FREESentinel-1 SAR imagery via STAC catalog
Large file sizes; requires STAC client for queries
Copernicus STAC
FREESentinel-1 catalog via Copernicus Data Space STAC API
Authentication required for download; catalog browsing is free
Photon / Nominatim
FREEOpen-source geocoding powered by OpenStreetMap data
Rate limited; no guaranteed uptime
🚢 SEA (1 source)
Finnish Digitraffic AIS
FREEReal-time vessel positions from Finnish maritime AIS network
Baltic and Nordic waters only; no global coverage