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# GIS Analysis

## How to Create NDVI Maps in ArcGIS

The image analysis toolbar can generate NDVI maps in ArcGIS. NDVI shows areas of high and low vegetation and requires red and NIR bands.

## Data Driven Pages Mapbooks in ArcGIS

Create thousands of maps instantly with data driven pages in ArcGIS. Learn more about adding dynamic text, zooming to extents and exporting PDF mapbooks

## 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 quick tutorial. Visualize geographic events (snow melt, forest fire, disease) as a function of time

## Principal Component Analysis (PCA) in GIS

Principal component analysis PCA identifies duplicate data over several datasets & aggregates essential information into groups called principal components.

## 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.

## Spatial Autocorrelation and Moran’s I in GIS

Spatial autocorrelation helps us understand the degree to which one object is similar to other nearby objects. Moran’s I is used to measure autocorrelation.

## ArcGIS Projections: “Define Projection” and “Project”

For ArcGIS projections, “define projection” changes the metadata of the current projection. The “project” tool changes the projected coordinate system.

## Python Minimum or Maximum Values in ArcGIS

Python minimum and maximum values in ArcGIS can be obtained from multiple fields. This is done with min and max commands using Python and Field Calculator.