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5 guides on Tutorials.
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. Methods, 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 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 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 […]
