What is Landsat? Satellites, Bands, Data Access

What is Landsat? Landsat is the joint USGS and NASA satellite program that has imaged the Earth’s land surface continuously since 1972, the longest such record in existence. Landsat 8 and Landsat 9 currently deliver 30 m multispectral and 100 m thermal imagery every 8 days combined. All Landsat data is free and open. What […]

What is Hyperspectral Imagery? vs Multispectral

What is hyperspectral imagery? Hyperspectral imagery is imagery that records a continuous spectrum for every pixel, typically 100 to 300 narrow bands 5 to 10 nanometers wide across visible, near-infrared, and shortwave infrared light. Multispectral imagery records 3 to 15 broad bands. The extra spectral detail lets analysts identify minerals, crops, plastics, and gases by […]

What is HRRR? NOAA Rapid Refresh Weather Model

What is HRRR? HRRR, the High-Resolution Rapid Refresh, is a NOAA weather forecast model that runs every hour on a 3 km grid over the contiguous United States, with an Alaska domain every three hours. Each run forecasts 18 hours ahead, extended to 48 hours four times a day. HRRR is the highest-resolution operational forecast […]

What is a GeoTIFF? Format, Tags, and COG

What is a GeoTIFF? A GeoTIFF is a TIFF image file that carries georeferencing metadata in standardized tags, so each pixel maps to a coordinate on Earth. The tags record the coordinate reference system, the pixel size, and the position of the grid origin. A Cloud Optimized GeoTIFF (COG) arranges the same file so clients […]

What is Geospatial AI? Models and Agents

What is geospatial AI? Geospatial AI, also called spatial AI or GeoAI, is the application of machine learning and AI agents to spatial data: satellite and aerial imagery, maps, elevation, and location records. It covers models that detect objects and change in imagery, models that predict values across space, and agents that write and run […]