# Building outlines

Building outlines were created using the following process:

 1. The city's [2009 building outlines](https://data.seattle.gov/dataset/2009-Building-Outlines/y7u8-vad7) were combined with the data using the parcel ids. Around 80% of the building outlines were found this way.
 1. [Mapzen](https://mapzen.com/)'s (RIP) Metro Extracts were used along with a spatial join with the buildings' latitudes and longitudes to get many more building outlines, leaving around 500 buildings without outlines.

Going forward, would consider doing a nearest neighbor search of the outline data from OSM with the buildings that are missing outlines. Geocoding the building data might also get more consistent matches with outlines using centroids.

Document current state of building outlines
Document current state of building outlines
