How would you use GIS data to build a better city?

Smithsonian Magazine
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A GIS (Geographical Information System) has given us a new way to model and observe the world. A GIS can map out the topography of a location, the density of certain social group or profession in different areas of a city, or even help to predict where hurricanes are going to occur based off of their previous locations. GISs are often constructed using data pertaining to the landscape, population, and climate of a given area. They can also simulate human interaction with specific areas and spaces. Learn more here:

x 3 winners
x 3 honors
solutions received

Explain how you could use GIS to inform the design of a city by answering the following questions:
1) What element of the city would benefit most from GIS simulations? Why? (e.g. traffic simulations, downtown design, park locations, etc)
2) How could you set up a test in a real city in order to prove the efficiency of your model?

Note: All ideas should be original. Additionally, there are no jobs being offered in associated with this challenge

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