Spatial information is everywhere, from 17th-century maps and atlases to current remote sensing imagery. JHU Data Services stewards more than 20,000 maps ranging from the 16th to the 21st centuries, as well as digital versions of geospatial data that are the building blocks of GIS. The technology and tools of GIS allow us to capture, manage, analyze, visualize and share information about the space around us, whether it be to analyze changing trends in a landscape, calculate spatial correlations, monitor health trends, etc.

JHU Data Services is here to help you access and use geospatial software, tools, and data, both analog and digital. We offer a number of ways to engage with us about GIS, geospatial data, and maps:


Email with a description of what you are working on, and we will set up a personalized one-on-one virtual consultation to help you.

We help with

Accessing Esri Software

Looking to install Esri software such as ArcGIS Pro? Visit our Esri Software Access libguide and review the information provided. If you have follow-up questions, contact us at

Troubleshooting Esri Software

Running into error messages when attempting to use Esri software? We can help you troubleshoot technical problems involving Esri software like ArcGIS Pro, ArcGIS Online, etc. As the administrators of JHU’s Esri site license agreement, we can also issue a Esri tech support ticket should we determine your problem requires escalation.

Applying GIS to Your Research or Class

Do you know what you want to accomplish but need help figuring out how to use GIS to achieve this? Have a question about what a specific geoprocessing tool does? We are available to consult on using GIS in your research, course design, or class work. Send us an email at to get started.

Accessing Geospatial Data

Need help finding geospatial data? Send us an email at

Accessing JHU’s Map Collection

JHU is home to a comprehensive collection of Baltimore City maps, atlases, and aerial photography, as well as thousands of maps on a global scale ranging from the Early Modern period to the present day. Learn more about finding and accessing our maps and online resources on our Maps and Online Map Resources libguide. If you have follow-up questions or would like to request maps for a class, contact us at


Data Services offers a number of hands-on webinars and self-paced trainings on how to use GIS software and common geoprocessing tools. Many of our webinars are offered live each semester. These include introductory courses on ArcGIS Pro and ArcGIS Online, as well as webinars on joining and geocoding your data.

Frequently Offered Webinars Include:

WebMapping: Using ArcGIS Online

An Introduction to GIS

Geoprocessing in ArcGIS Online

Introduction to GIS

Intro to ArcGIS Pro

Geoprocessing in ArcGIS Pro

Intermediate GIS




View our libguides on GIS and Maps to learn more about how to access, use and teach with GIS software, data and maps. For self-paced trainings and guides, including accessing Esri Learn Lessons and Trainings, visit our Resources page.

Services we do not cover