Category Archives: FORT 260

Extensions need to be authorized

Recently, I wanted to use the Spatial Analyst extension on ArcGIS 10 and got this cryptic message. I knew for certain that the extension was licensed. It showed as installed and licensed elsewhere in the program. After getting help from… Continue reading

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How much area do buffers on streams take

In this exercise we clipped streams to the borders of the Michaux Forest. Then we created buffers of different widths to see how much area each buffer width takes up. Below are summaries of the lengths of the streams by… Continue reading

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The personalities of map projections?

I never knew that map projections had personalities…Image permalink…. Continue reading

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Stream Buffers

Protection of streams is critical to maintaining water quality. In Pennsylvania quality standards for streams have been set in Chapter 93 of the Pennsylvania Code. Below is a map of the Michaux State Forest showing streams going through the forest…. Continue reading

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Develop an Elevation Profile

In surveying we have been making elevation profiles from differential leveling data for as long as I have been teaching the course. Recently, I came across a help page from the University of Georgia that uses ArcGIS to associate data… Continue reading

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Use GIS to study cover type changes

The Penn Pilot web site provides historical aerial photos for most of Pennsylvania. You can either view the photos on the site or download them to use with other applications. Recently, in GIS class we used ArcGIS 9.2 to position… Continue reading

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Lessons Learned

The more I use ArcGIS the more I realize that it is a very complicated piece of software. You have to be careful to understand each function to deal with problems as they arise. Here are a few tips I… Continue reading

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GIS and Resouce Conflicts

During yesterday’s discussion on the uses of GIS the author, Bolstad, emphasized that GIS can be used when there are conflicts in the use of natural resources. Or where there is competition for resources. This got me thinking about the… Continue reading

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