10 Free GIS Data Sources: Best Global Raster and Vector Datasets
Turbo-charge your search for free GIS data with this list of 10 free, downloadable global GIS datasets from highly reputable sources – vector and raster.
Author: GISGeography
We help you learn Geographic Information Systems and remote sensing
How to Calculate Mean Absolute Error (MAE) in Excel
This guide shows how Mean Absolute Error in GIS is used. We give a step-by-step instructions how to calculate MAE in Excel and a quick formula to use.
Time Series Animation in ArcGIS
Configure your time series animation in ArcGIS with this tutorial. Visualize geographic events (snow melt, forest fire, disease) in time
Natural Earth Data – Free GIS Public Domain Data
Natural Earth data is a free raster and vector (cultural and physical) data package containing the most common elements that you need to create a map.
Principal Component Analysis (PCA) in GIS
Principal component analysis PCA identifies duplicate data over several datasets & aggregates essential information into groups called principal components.
Multispectral vs Hyperspectral Imagery Explained
Multispectral vs Hyperspectral imagery. Hyperspectral contains hundreds of narrow bands. Multispectral usually consists of only 3 to 10 wider bands.
How to Calculate Root Mean Square Error (RMSE) in Excel
Root Mean Square Error (RMSE) in GIS can be used to calculate how much error there is between predicted and observed values. (ex. error in a DEM)
Adding Excel Lat Long Coordinates into ArcGIS
Follow these quick 5 steps and turn Excel lat long coordinates into spatial data in ArcMap. Set to WGS 1984. Add table. Display XY Data. Export shapefile.
ArcGIS Shapefile Files Types & Extensions
ArcGIS shapefile files are composed of mandatory files (SHP, SHX and DBF) and optional files (PRJ, XML, SBN and SBX). This article lists their functions.
USGS Earth Explorer: Download Free Landsat Imagery
The USGS Earth Explorer is quick and easy to download free Landsat imagery & other remote sensing data. Enter ROI, define timeline and download for free.