Terrain Analysis in GIS: Slope, Aspect, Curvature, Hillshade, and TWI Explained
Learn terrain analysis in GIS: slope, aspect, curvature, hillshade, and TWI — what they mean, how they’re calculated, and when to use each one.
What Is a Digital Elevation Model in GIS? DEM, DSM, DTM Explained
Learn what a digital elevation model is in GIS, the difference between DEM, DSM, DTM, and nDSM, data sources, resolution, and how to choose the right one.
Surface Analysis in GIS: What It Is and How It Works
Most GIS analysts can answer “where” with confidence. Point a query at a dataset and the answer comes back clean. But introduce elevation and suddenly the workflow stalls. The question shifts from “where is it?” to “what does the ground actually look like here?” And that is a fundamentally different kind of analysis. That gap…
Euclidean Distance and Network Distance in GIS: Which One Should You Use? (A Complete Guide)
Euclidean distance and network distance in GIS answer different questions. Learn when each applies, how they compare, and how to run service area analysis.
What Are Thiessen Polygons in GIS? Understand the Voronoi Diagram
Learn what Thiessen polygons are in GIS, how they are constructed, their applications in hydrology and service planning, and their core limitations.
Cost Distance Analysis in GIS: Resistance Surfaces, Accumulated Cost, and Least Cost Paths (A Complete Guide)
Learn what cost distance analysis in GIS is, how resistance surfaces and accumulated cost work, and how least cost path analysis finds wildlife corridors. Two wildlife habitat patches sit 5 kilometers apart on a map. By straight-line distance, they are close. But between them lies a mosaic of agricultural fields, a four-lane highway, and a…
Buffer Analysis in GIS: What It Is, Types, and When It Fails (A Complete Beginner’s Guide 2026)
Learn what buffer analysis in GIS is, the four main buffer types, real-world applications, and the critical limitation that misleads analysts.
Proximity Analysis in GIS: Distance, Buffers, and the Spatial Relationships That Drive Decisions
roximity analysis in GIS measures distance relationships between features. Learn buffer analysis, network distance, cost distance, and when to use each.
Overlay Analysis in GIS: How Combining Geospatial Layers Reveals What Maps Alone Cannot
What is overlay analysis in GIS? Learn how vector overlay, raster overlay, and weighted overlay work — with types, examples, applications, and a step-by-step workflow.
What Is Geospatial Technology? A Complete Guide to the Tools Behind Modern Mapping
Geospatial technology is the collection of tools, systems, and platforms used to capture, store, process, analyze, and communicate information about Earth’s surface.
