20 guides Discover: geospatial data and physical AI, explained Plain-language guides to the data, formats, and methods behind AI for the physical world, from LiDAR and Landsat to change detection and catastrophe modeling. Spatial Join Sentinel-2 Synthetic Aperture Radar (SAR) Stochastic Modeling Raster vs. Vector Data NDVI Parcel Data Physical AI LiDAR Data Landsat Hyperspectral Imaging HRRR Model GeoTIFF Geospatial AI Flood Risk Map Earth Observation Data Digital Elevation Model Data Center Site Selection Catastrophe Modeling Change Detection in Satellite Imagery Spatial Join Sentinel-2 Synthetic Aperture Radar (SAR) Stochastic Modeling Raster vs. Vector Data NDVI Sort By Most Recent Most Recent Oldest Categories What is? View All change detection Stochastic Modeling site selection Risk modeling Earth Observation What is? Physical AI Tabular Joins Vector Raster Tutorials Sort By Most Recent Oldest Categories View All change detection Stochastic Modeling site selection Risk modeling Earth Observation What is? Physical AI Tabular Joins Vector Raster Tutorials 12 Mins Read 3 Oct 2026 What Is a Spatial Join? Predicates, Types, and SQL A spatial join matches rows from two tables by where their geometries sit. How spatial joins work, the predicates and join types, and how to write one in SQL. 12 Mins Read 3 Oct 2026 What Is a Spatial Join? Predicates, Types, and SQL A spatial join matches rows from two tables by where their geometries sit. How spatial joins work, the predicates and join types, and how to write one in SQL. 9 Mins Read 3 Oct 2026 What is Sentinel-2? Bands, Resolution, Data Access, Uses Sentinel-2 is the Copernicus optical satellite mission that images Earth's land and coasts in 13 spectral bands at 10 to 60 m every five days. Its bands, resolution, products, free data access, and uses. 9 Mins Read 3 Oct 2026 What is Synthetic Aperture Radar (SAR)? Bands, Data, Uses Synthetic aperture radar (SAR) images the ground with microwaves, day or night, through cloud. How SAR works, its bands, products, and data sources. 8 Mins Read 3 Oct 2026 What is Stochastic Modeling? Definition, Types, Examples Stochastic modeling simulates thousands of possible outcomes from random variables. How it works, stochastic vs deterministic, and how cat models use it. 8 Mins Read 3 Oct 2026 Raster vs. Vector Data: Differences, Formats, and Uses Raster data is a grid of pixels. Vector data is points, lines, and polygons. How the two GIS data models differ, their formats, and how to combine them. 9 Mins Read 3 Oct 2026 What is NDVI? Formula, Values, and Uses NDVI, the normalized difference vegetation index, measures how green and dense vegetation is from red and near-infrared light. The formula, what the values mean, and how to calculate it. 1 2 3 Next » Sign up for our newsletter Be the first to know about releases and industry news. We care about your data; read our privacy policy. SUBSCRIBEΔ
