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 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.

What is LiDAR Data? Point Clouds, USGS 3DEP, Uses

LiDAR data is the set of 3D points produced by a laser scanner that times the return of each pulse to measure distance. Each point has x, y, z coordinates plus intensity and a classification such as ground, building, or vegetation. Airborne LiDAR data maps terrain and structures at centimeter to decimeter accuracy. What LiDAR […]

What is Landsat? Satellites, Bands, Data Access

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 Landsat is Landsat […]

What is Hyperspectral Imaging? vs Multispectral

Hyperspectral imaging produces 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 their reflectance signature. What […]

What is the HRRR Model? NOAA Rapid Refresh Forecast

The HRRR model, NOAA’s High-Resolution Rapid Refresh, is a 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 NOAA publishes. […]