The goal of lab 4 was to investigate vector analysis using ArcGIS with several different geoprocessing tools. The main straight forward goal of this lab was to determine the best place for bears to live. In other words we wanted to find where there ideal habitat is. The study takes place in a portion of Marquette County, Michigan, near Lake Michigan.
The purpose of this lab was to gain more knowledge on the use of geoprocessing tools. A large part of our lab was to be able to diagnose the situation and figure out what we wanted to geoprocess and then select the correct tool. In this lab we were given multiple data sets to work with and explore. We worked with the land covers in the county, bear locations, where rivers flow, DNR management land and many other data sets were offered. We had to use several different join, and many geoprocessing tools to get the data sets that we were seeking to create.
This lab was the first lab we have had that was really vague, our hands were not being held on this lab, the directions were vague which gave us the opportunity to try many things that we wanted to try. The reason this lab was given to use with minimal step by step directions was to ensure that we were understanding what we were learning. What better way to assure that we were understanding than to apply our skills to a real world setting. First we imported the county data, streams, and the land cover. Next we joined bear count with the land cover to see which three land type covers held the most bears. The three areas that held the most bears were, Evergreen Forests, Residential areas, and wetland forests. Our next step was to create a 500 meter buffer around the streams in our study area to get a sense of if bears depended on rivers or not. So we added our buffer, then went to geoprocessing and used the dissolve tool on the buffer. Our results revealed that over 70% of bears live within 500 meters of streams. When examining the map below, consider where streams are while looking at the ideal habitat because it is clear they play a very influential role in finding the best spot to relocate bears. Next we selected the top three land cover types and put borders around the land covers. We did many things in this lab to see certain things and to figure out reason for why things are how they are. Then we added the DNR management land locations, using this data I combined it with the likely areas for bears to live. Next I added the DNR and landcover bear habitat data together and we wanted to create a buffer around Urban or built up land. We wanted to create a 5 kilometer buffer around built up land, simply because we do not want to propose bear locations in areas where people are. Then we used the erase tool to get rid of the original feature class and to keep the one with the residential buffer. Finally after I found the locations that I wanted the bears to be located I changed colors on the map. I made the background color a pale yellow as to not take away from the map, I made streams blue for obvious reasons and the stream buffer I made brown. I added transparency to all of these so we could see the terrain a little beneath. Lastly I added a north arrow, a scale, my legend, a mini map showing the highlighted study area in Marquette county, and a title.
The results that I found after completing my lab is that the ideal area for bears is within 500 meters from streams and not inside the 5 km buffer around the urban and built up areas.
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