| Baltimore, Maryland, United States|
|latitude: 39.2947, longitude: -76.604|
|Browse map of Baltimore 39°17′40.92″ N, 76°36′14.40″ W|
|Use this template for your city|
|OpenStreetMap images (and underlying map data) are freely available under OpenStreetMap License.|
To add more points-of-interest to the city map as well as tackle areas that still need mapping.
- Road Verification
- Look at the resources section for a link to the City's site where they have data on proper street names and locations.
- Adding Alleys
- There are many thousands of small alleys throughout the city, many of which are not mapped, or are mapped incorrectly by way of TIGER
- Bus Routes
- Building outlines
- Neighborhood Polygons
- ZIP Codes
Local mappers have established a Slack channel to discuss issues and interesting things on the map in Baltimore and throughout the state of Maryland. The channel is hosted on the OpenStreetMap US Slack, in the #maryland channel. Join the Slack here
There is a MapTime group in the Baltimore area, Maptime Bmore.
- Saturday, July 12, 2014 starting in or near the Patterson Park pagoda at 11 a.m. (Edit on day of event: Rain location looks like it won't be needed, since it's beautiful out. If it gets stormy before noon, check back here for a fallback location.) If you have a netbook (or even better, a netbook and a data plan to which wifi connections can be tethered), we encourage you to bring it, as we'll be working in pairs of two and staying mostly in pretty docile neighborhoods. That said, if you're not comfortable walking around Baltimore with a laptop, that is understandable, and we'll certainly be happy to let you gather data on paper, then enter it elsewhere after the fact. If you choose to bring technology, we will have you sign a waiver acknowledging the basics of urban life (i.e., some possibility of crime). Contact person: BaltiMapper. --ElliottPlack (talk) 13:59, 2 May 2014 (UTC)
Previous Mapping parties
- May 30, 2009 The French Press Cafe
- May 31, 2009 Red Emmas, 800 St. Paul St
- Apr 2009 at Red Emmas 
- Like everywhere in the U.S. we've started with TIGER data, which requires a lot of TIGER fixup. We're making good progress with turning this green
- Baltimore City's Open Data Catalog offers public domain datasets. Mapper asciiphil felt that the landuse shapefile was unsuitable as a direct import, but has created a landuse map to use as a reference while mapping.
- User user:ElliottPlack has started a project testing some data from Baltimore's Opendata site. On the wiki: BaltimoreCityGIS and Baltimore_Buildings_Import_2.0