Determine angles of sections for MLB stadiums

I need someone to take the venue maps of each of the 30 Major League Baseball teams and measure the angle of each section (front left, front right, back left, back right) from the pitcher's mound such that the angle of home plate is 0 degrees and center field is 180 degrees. If the event that there are sections that are broken into pieces, such as section 368 in the attached diagram of Camden Yards (taken from [login to view URL] - all maps should come from [login to view URL]), the two parts of the section should be recorded separately, in this case "368 Front" and "368 Back." There should also be no space between most sections, so that the right angle of a section should be the same as the left angle of the adjacent section to the left. I have found that gimp has a Measure tool with a protractor that makes this a relatively simple process and photoshop likely has a similar tool. I have attached a sample spreadsheet showing desired headers with a few sample values filled in for Camden Yards as well as a screenshot of Gimp with the protractor tool in use.