Georeferencing: How to Georeference Images
Learn how to georeference with precision in this georeferencing guide. Add control points in two images, select a transformation and check your RMSE.
Author: GISGeography
We help you learn Geographic Information Systems and remote sensing
What is GIScience (Geographic Information Science)?
While Geographic Information Systems answers “what” and “where”, Geographic Information Science (GIScience) is concerned with the “how” and its development.
Conic Projection: Lambert, Albers and Polyconic
When you place a cone on the Earth and unwrap it, this results in a conic projection. Examples are Albers Equal Area Conic and the Lambert Conformal Conic.
The Atmospheric Window in Remote Sensing
The atmospheric window allows specific bands of electromagnetic (EM) radiation to reach the Earth. On the other hand, absorption bands prevent EM radiation.
Erase Tool in GIS
The Erase Tool removes the area that is overlapping with the erasing features. Everything outside the erasing layer ends up in the output.
What Is Esri Tapestry Segmentation?
Esri’s tapestry segmentation data provides insights on lifestyle choices made by customers helping you make more informative business decisions.
GPS Accuracy: HDOP, PDOP, GDOP & Multipath
Have you ever wondered about your GPS accuracy? A well-designed GPS receiver can achieve a horizontal accuracy of 3 meters or better. But factors affect it.
What is Tobler’s First Law of Geography?
Tobler’s First Law of Geography states that everything is related to everything else, but near things are more related than distant things.
What is Conflation, Edge Matching and Rubbersheeting?
When you have two conflicting data sets, conflation resolves conflicts by preserving the most accurate one. Edgematching and rubbersheeting helps fix errors
The State Plane Coordinate System (SPCS)
The State Plane Coordinate System divides the United States into 124 zones to locate any point with a high level of accuracy (one part in 10,000).