1)  See if the response time between reports made and report closes varies geographically within the city.  I don't know any objective C, but was thinking about massaging the data with python.  That sounds quite doable.  
2)  looking at if reporting rates vary geographically in the City.   As if I am asking, are there some neighborhoods characterized by squeaky wheels and others that hardly bother to report?   Unfortunately  I''m conceptually stuck at the issue, how do I distinguish between the case that says are less reports in a geography because there are less issues, and the theory that says a neighborhood gets more services because the people there are more astute or involved in raising their issues.
Thanks for the interest.