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25 guides on Vector.
What is H3? Uber’s Hexagonal Spatial Index
H3 is Uber's open-source hexagonal grid for indexing locations on Earth. How the H3 index works, its 16 resolutions, H3 vs S2, geohash and quadkeys, and H3 in SQL.
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 Geospatial Analysis? Methods and Examples
Geospatial analysis, or spatial analysis, examines where things are and how location shapes patterns. Core methods, hot spots, examples, GIS vs spatial analysis, and SQL.
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? A Spatial Data Catalog
The Havasu Catalog is the Wherobots spatial data catalog: open geospatial datasets, RasterFlow models, notebooks, and apps, stored as Apache Iceberg tables and queryable in place with spatial SQL.
What is a Building Footprint? Data, Sources, Uses
A building footprint is the outline a building occupies on the ground. What footprint data contains, the major open datasets, and how to use them at scale.
What is POI Data? Points of Interest Data, Sources
POI data lists the places people go: shops, restaurants, hospitals, schools, and landmarks. What a record contains, where it comes from, and how to use it.
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.
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 Parcel Data? Parcel Numbers, Boundaries, Sources
Parcel data records every piece of land: its boundary, parcel number, owner, land use, and assessed value. Where it comes from and how to use it.
What is the HRRR Model? NOAA Rapid Refresh Forecast
The High-Resolution Rapid Refresh (HRRR) model is a numerical weather prediction (NWP) model from the National Oceanic and Atmospheric Administration (NOAA). It runs every hour on a 3 km grid over the contiguous United States, with an Alaska domain every three hours. Each run starts from the latest radar, satellite, aircraft, and surface observations and […]
What is Geospatial AI? GeoAI Models, Agents, Examples
Geospatial AI, also called GeoAI or spatial AI, is the use of machine learning and AI agents on data tied to places on Earth. That data includes satellite and aerial imagery, maps, elevation, parcels, and location records. It covers computer vision on imagery and foundation models that turn imagery into embeddings, reusable lists of numbers […]
