GIS Contributor

Guest articles from GIS professionals. Authorship information is listed at the bottom of the articles.
An aerial image with white dots showing the location of planted trees.

Mapping Trees During Planting

GIS Contributor

STA Logger, developed by TerraLab, can be fitted with tree planters to map the location of newly planted trees.

Examples of topological errors in GIS that can occur during data creation/digitization. Image: Caitlin Dempsey

GIS Data: A Look at Accuracy, Precision, and Types of Errors

GIS Contributor

What are the types of error found in GIS data? This article reviews the difference between accuracy and precision and explains the most common types of error found in GIS data.

Screenshot from a GIS software program showing an aerial image with geospatial data overlays for Missouri.

Finding GIS Data and Using QGIS to Map Caves

GIS Contributor

Dackery Geiman outlines the challenges he encountered finding geospatial data about caves and using QGIS to map cave density in Missouri.

Elevation map with shades of green.

GIS in Land Use Planning and Surveying

GIS Contributor

Michael Parks explains how he used GIS data and imagery to develop geospatial analysis and maps to recommend potential base camp sites.

A detailed map showing a shaded relief area and a popup with attribute data about a fly fishing shop.

Using GIS to Map Fly Fishing Destinations

GIS Contributor

William Bakemeyer describes how he used QGIS and open source data to create a fly fishing map.

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