Use a large piece of paper (or any other material to write on), and draw the following information. Use different colours, and make sure you have plenty of space to accommodate all the information of the next steps.
Where to get further information: For a first step, it may be helpful to draw this map (simply by hand) - but use a piece of paper that is large enough to it can accommodate further notes. You should be able to get further information or plans and maps from the local authorities (spatial planning offices).
SSWM Tools that may help you here:
Unsustainaville is located in a plain, next to a river and some miles upstream from the sea. It has an industrial area to the North of the city, a central business district and some high income areas. To the East, there are also some low income areas that are not well developed. To the South, almost within the city, are some agricultural areas.