1. Baltimore City Property Tax Map Ryan J. Smith June 2, 2013

2. Motivation Limited development experience Mapping seems most accessible from development as well as usage perspectives Start with AppsForPhilly Property Tax App, build from there

3. Baltimore Tax Facts Baltimore City Property Taxes are HIGH Current Baltimore City Tax Rate: $2.268 for every $100 of assessed property value (LiveBaltimore.com) Current Baltimore County Real Tax Rate: $1.10 per $100 of assessed property value (BaltimoreCountyGov.com) http://www.livebaltimore.com/resources/cityindex/property_taxes/ http://www.baltimorecountymd.gov/Agencies/budfin/customerservice/taxpayerservices/taxrates.html

4. Assessment & Appeal Property values are assessed by Baltimore City every 3 years Homeowners may appeal this assessment if they disagree with it An important consideration of the appeal process is the assessed value of comparable homes While this information is available online, it is difficult to find and compare records within a small geographical area

5. Introducing: Baltimore City Property Tax Map Built using property geography records and city property tax records provided by the city of Baltimore Map currently hosted by Mapbox.com

6. Viewable at Multiple Scales View Individual AddressesView Trends Over Larger Areas

7. Tooltips Provide Specific Information

8. Tools Used Property Tax Values and Property Geometry: Street maps from OpenStreetMaps Data exploration and munging done: Quantum GIS Map tile production: TileMill Map hosting: Mapbox.com https://data.baltimorecity.gov/

9. Future Additions: Improved interface, search tools, optimized for speed Filter by square footage, bedrooms, etc. Add map layers illustrating property tax assessed versus tax paid