Mapping marijuana grow houses

by Patrick Cain

We’ve mapped marijuana grow operations in Toronto before, but this year’s iteration is more ambitious: 

- First, we took the fresh 2011 census data and our census tract boundary set, mashed that up with several years’ worth of grow operation addresses, and created a map showing grow house rate by census tract. If you have the ability to count points within a polygon (Leslie showed me how to do this) it opens the door to interesting off-the-grid uses for census data.

- The other map shows grow ops by location for several years: