I used this code to scrape three databases for information about non-owner occupied property in Baltimore, in hopes of identifying entities which own a large number of vacant properties. Check out the blog post for a full explanation and important caveats.
I was inspired by the work at Baltimore Slumlord Watch. Kate Bladow suggested I tackle this project.
All of the data have been published to https://github.com/subelsky/baltimore_property/downloads.
If you'd like to explore the data on your own I recommend loading non_owner_occupied_properties.tsv.gz
into Google Refine.
Email me at mike@subelsky.com or hit me up at @subelsky.
Licensed as Creative Commons. See LICENSE file for details.