We used the Baltimore 311 2013 call data available in Socrata's Open Data API. We made use of leaflet and d3 javascript libraries to visualize the data. The choropleth map view depicts the varying number of calls by zip code. When mousing over a zip area you will see popups displaying additional data about the area including a d3 pie chart of the top 10 calls in each area. You can zoom in on an area by clicking on it. In order to create the boundaries of the choropleth we converted shapefiles to geojson files. We then used the zipcodes from the geojson file to perform searches on calls in the relevant zip codes. The Call Map view lists all of the reports for the various types of requests. To get more detail on a call click on one of the markers and a popup will show.

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