Use Principal Component Analysis to Eliminate Redundant Data

Run a Principal Component Analysis. Eliminate redundant data. Speed up processing time.

What is Principal Component Analysis in GIS?

PCA. You’ve probably seen this acronym before. PCA stands for “Principal Component Analysis“.

But what is it and how is it used in GIS and remote sensing?

Sometimes, variables are highly correlated in such a way that it would be duplicate information found in another variable. Principal component analysis identifies duplicate data over several datasets

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Multispectral vs Hyperspectral Imagery Explained

Imagine seeing in the eyes of bumble bees, goldfish and humans. Multispectral vs Hyperspectral Imagery Explained

What is the difference between multispectral and hyperspectral imagery?

Multispectral vs hyperspectral. What are the differences between the two?

You read this post. Your eyes see the reflected energy from your screen in three channels: red, green and blue.

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Root Mean Square Error RMSE in GIS

Master one of the most widely used statistics in GIS - Root Mean Square Error RMSE -

What is Root Mean Square Error RMSE?

Root Mean Square Error (RMSE) (also known as Root Mean Square Deviation) is one of the most widely used statistics in GIS. RMSE can be used for a variety of geostatistical applications.

RMSE measures how much error there is between two datasets. RMSE usually compares a predicted value and an observed value. For example, a LiDAR elevation point (predicted…

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Adding Excel Lat Long Coordinates into ArcGIS

Adding Excel Lat Long Coordinates into ArcGIS

How to add lat, long coordinates from an Excel spreadsheet into ArcGIS?

Adding Excel lat long coordinates can be a daunting task for those starting out in ArcGIS.  That’s why we’ve made this easy-to-follow tutorial to guide you in the right direction.

Let’s look at a quick and easy approach to transform an Excel table into geographic data in ArcMap.

1. Convert degrees/minutes/seconds to decimal…

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ArcGIS Shapefile Files Types & Extensions

Ever wonder what all those files were in an ArcGIS Shapefile? We have the answer.

Quick Tip: What are the shapefile files? ArcGIS Shapefiles: Points, Lines and Polygons

ArcGIS Shapefiles: Points, Lines and Polygons

ArcGIS shapefiles are made up of mandatory and optional files. The mandatory file extensions needed for a shapefile are .shp, .shx and .dbf. The optional files are: .prj, .xml, .sbn and .sbx

What is the function of each of these ArcGIS file types? You also may have wondered how to open GIS files…

If you have an…

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Visualizing Satellite Orbits in SaVOIR Software

It’s a bird. It’s a plane. Look up in the sky and visualize satellite orbits in SaVOIR Software

How to look at different satellite orbits using SaVOIR software?

The number of Earth observation satellites being launched into orbit has vastly increased over the years. Given the complexity of orbits and the sheer number of satellites, it’s difficult to understand their current position in space.

SaVoir (Swath Acquisition Viewer) software is a tool that visualizes this complexity. SaVOIR…

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USGS Earth Explorer: Download Free Landsat Imagery

USGS Earth Explorer: Download Free Landsat Imagery

How to download free Landsat imagery with USGS Earth Explorer?

The USGS Earth Explorer is a similar tool to the USGS Global Visualization Viewer (GloVis) in that users search catalogs of satellite and aerial imagery. The USGS Earth Explorer is the new and improved version.

The USGS Earth Explorer gives some extra capabilities:

  • Downloading data over chronological timelines.
  • Wide range of…

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Spatial Autocorrelation and Moran’s I in GIS

Spatial Autocorrelation and Moran’s I in GIS

What is spatial autocorrelation (spatial dependency)?

Spatial autocorrelation in GIS helps understand the degree to which one object is similar to other nearby objects. Moran’s I (Index) measures spatial autocorrelation.

Geographer Waldo R. Tobler’s stated in the first law of geography:

“Everything is related to everything else, but near things are more related than distant things.”


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ArcGIS Projections: Define Projection and Project

ArcGIS Projections: Define Projection and Project

A Quick Tip on ArcGIS Projections: What is the difference between “Define Projection” and “Project”?

arcgis projections california

You have a shapefile and it’s looking a bit out place. The data is not where it should be on the map. This makes every geographer cringe. A feature in the wrong location. But, features don’t have to be like this….

The answer? Use ArcGIS projections – specifically the “Project” tool.


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What is Geographic Information Systems (GIS)?

DISCOVER the power of GIS in this new GIS Geography post. Includes an amazing GIS INFOGRAPHIC too! #GIS #Infographic

GIS stands for Geographic Information Systems

Geographic Information System Computer Tool

When we look at an old map, it’s like we are traveling back in a time machine. A map not only shows geography, but paints a story of something of importance, or a type of struggle.

This is what Geographic Information Systems is today, too. GIS helps us understand what belongs where. It helps understand the location of something of importance.


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