Geographic Information Systems (GIS)

A GIS, or Geographic Information System, provides for the collection, maintenance, analysis and management of geographically referenced information. A GIS combines the efficiency of a computerized mapping system with the power of a relational database. You can look at it as an intelligent map. On the screen you see the lines, points and symbols that make up the map. But behind every feature on that map – every street, light pole or sewer pipe – is a table containing attribute data about that feature – its name, ID number, diameter etc. Because the map features (roads, sidewalks etc.) have information stored with them, you can query the map in much the same way as you can query a database.

The most important component of a GIS is its data and the most important data set is the basemap. This basemap is the foundation upon which the entire GIS will be built. The Hammond Sanitary District has been compiling and maintaining the basemap for the city since 1995. It was created from very accurate aerial photography and has been updated since then using engineering drawings and additional photography.

For security reasons, our utility map layers are not available to the public. Please use Indiana811 if you need to know whether or not any of our pipes are in the way of a planned excavation.

Our department also provides mapping support for the City of Hammond and we have created a library of maps for residents which answers such questions as “What city council district am I in” or “What day will they pick up my garbage?”. You can find this map gallery on the city website, under Quick Links -> Interactive City Map.

If you have any questions, you can contact Becky McKinley, our GIS Manager, at


Becky McKinley, GISP: GIS Manager

219-853-6413, Ext. 516