Maps and online map resources

This guide goes over how to access the Map Collection in Data Services and online maps from JHU and beyond

Data Services

We are here to help you find, use, manage, visualize and share your data. Contact us to schedule a consultation. View and register for upcoming workshops. Visit our website to learn more about our services.

Where to find maps at Johns Hopkins

The largest collection of maps at Johns Hopkins is stored at the Libraries Service Center (LSC) but requestable via Catalyst. It is the most comprehensive collection of Baltimore City maps, atlases, and aerial photography found anywhere. Included are thousands of printed map sheets and digital images.

All maps of Baltimore City, the State of Maryland and places within, are listed in the library’s online catalog Catalyst. They can be requested for on-site viewing in a library reading room via their Catalyst links. Digital copies of maps, when not covered by copyright restrictions, are available for free downloading via our institutional repository JScholarship.

Highlights of the collection include:

  • All Maryland historical county atlases (1876 – 1915)
  • Baltimore City atlases & maps series (1876 – 2008)
  • Topographic maps
  • Aerial photography  of Baltimore City (1920 – 1972)
  • Baltimore urban development plans
  • Special purpose maps of Baltimore including, zoning, transit, infrastructure, ward boundaries, neighborhoods, cartoon maps, roads, water distribution, and much more.

In addition to the main map collection at LSC, small collections of maps are found at the George Peabody Library and at the John Work Garrett Library. Maps in theses collections are also listed in the Catalyst online catalog. Digital images of their Maryland and Baltimore sheet maps are also included in JScholarship.



These materials are licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License, attributable to Data Services, Johns Hopkins University.