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23 guides on Raster.
What is Geospatial Data? Types, Formats, Examples
Geospatial data describes things tied to a place on Earth. The two main types, vector and raster, plus formats, sources, and examples.
What is a Coordinate Reference System? CRS, EPSG
A coordinate reference system (CRS) ties coordinates to places on Earth. Geographic vs projected systems, datums, EPSG codes, WGS 84, UTM, and ST_Transform.
What is the Havasu Catalog? History and Next Steps
The Havasu Catalog is the Wherobots knowledge lake for physical world data: open datasets, RasterFlow models, notebooks, and apps, queryable in place with spatial SQL.
What is Satellite Imagery Analysis? AI, Tasks, Uses
Satellite imagery analysis turns satellite and aerial pixels into maps, counts, and alerts. The computer vision tasks, the data, and how AI runs them at scale.
What is Land Cover Classification? Classes and Data
Land cover classification labels every part of the Earth's surface by what covers it, such as water, forest, crops, or pavement. The classes, the datasets, and how to map change.
What is Probable Maximum Loss (PML)? EP Curves, AAL
Probable maximum loss (PML) is the largest loss an insurer expects from one property or a portfolio at a chosen probability. How PML, EP curves, and AAL fit.
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.
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.
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.
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.
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.
What is Physical AI? Definition, Stack, Examples
Physical AI is artificial intelligence that perceives, reasons about, and acts in the physical world: robots, autonomous vehicles, and Earth-scale models.
