This question already has an answer here:
I'm brand new to GIS (and this site) so bear with me if there is an obvious answer for this but I've done a lot of looking and haven't found anything that worked.
I have two polygon layers that show the same waterway buffer for a large area but one is more extensive than the other. I want to subtract the smaller layer from the larger one so that I am left with the areas that are only covered by the larger. This seems like the type of problem that could be easily solved with the "erase tool" but I don't have access to that. The "select by location" seems to be a popular suggestion but I've played around with it and haven't gotten it to work. Also the two layers are not quite identical.
What should I do?