This is a map showing Gulf county largest landowners as well as water sources and major cities.

This assignment seemed easy enough, but I'm sure I missed something somewhere. Here are my answers to the questions.
1. I used the symmetrical difference tool. I don't know why I chose this particular tool, but I did not notice any big differences.
2. For the conservation area I used the erase tool.
3. There were 6 features in the possible sites layer. The largest was 3.680903 and the smallest was 0.377479.

I'm not entirely sure I did this right.

For the first photo I got an RMS of 19.27954. For the second photo I used 2nd order polynomial and 16 points and got RMS error of 8. 97384. I had a little trouble with the second photo, mainly a few buildings not lining up. Most of the features match.

Indian River County map 3 showing DOQQ's.

Indian River map 2 shows the hydrology in line and polygons.

This is the Indian River CountyBoundary map showing public lands, major roads and cities, invasive plants, and conservation areas.