Thursday, March 18, 2010

Week 9 Vector Analysis II


The lab was to create buffer polygons based on criteria using 3 different polygon layers, then determine where these buffer areas intersected. We created areas for potential campsites that were within 300 meters of existing roadways, within 150 meters of lakes, and within 500 meters of rivers. We were also asked to exclude areas that were considered conservation areas. The answers to the following questions:

1, I used the intersect tool - intersecting the road buffer and the water buffer files. I did not find any difference between the two.

2. I used the erase tool to exclude areas that fell into the conservation areas since as campgrounds could not fall into those areas.

3. I ended up with 79 separate polygons. Acreage of the largest feature was 1918.77, acreage of the smallest feature was 0.18.

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