Mapping marijuana grow operations

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:



Here’s how it looked on TV:

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