Performing geospatial calculations
Shapely is a very capable library for performing various calculations on geospatial data. Let's put it through its paces with a complex, real-world problem.
Task – identifying parks in or near urban areas
The US Census Bureau makes available a shapefile containing something called Core Based Statistical Areas (CBSAs), which are polygons defining urban areas with a population of 10,000 or more. At the same time, the GNIS web site provides lists of place names and other details. Using these two data sources, we will identify any parks within or close to an urban area.
Because of the volume of data we are dealing with, we will limit our search to California. It would take a very long time to check all the CBSA polygon/place ...
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