Partner Spotlight: Frederick County GIS

Frederick County, Maryland Geographic Information Systems (GIS) operates under the Interagency Information Technologies (IIT) Division to provide spatial data support for various citizen services and county government agencies.

To understand what Frederick County GIS accomplishes on a daily basis, you must first understand what a geographic information system is. GIS is a framework for gathering, managing, and analyzing data rooted in the science of geography. GIS integrates many types of data, analyzing spatial location and organizing layers of information into visualizations using maps and 3D scenes. ​With this unique capability, GIS reveals deeper insights into data, such as patterns, relationships, and situations, helping users make smarter decisions.

Frederick County GIS is responsible for a large majority of Frederick County’s data and maintains that data’s digital attributes and location. This includes key data layers such as addresses, parcels, and roads critical to the daily operations of numerous county divisions like Public Safety, DPW, and Planning / Permitting. This data is then distributed to the county divisions or public for use via internal processes, web mapping applications, or our interactive GIS web portal.

The GIS web portal, located at, is a one stop shop for all GIS related data and information available to Frederick County citizens. It includes access to our web mapping applications gallery, address and road name submittal form, as well as our standard countywide maps and atlases. It also includes our new and improved data page ( On this page users can search data, documents, and applications that are provided via a search functions as well as pre-packaged .zip files.

The web portal also gives direct access to all of Frederick Counties web mapping applications ( These applications provide data and analysis on various topics including crime, road closures, elections, parks, schools, as well public works requests. Each of these applications is customized to provide valuable insight to the public.

Property Explorer (, the most popular application that GIS provides, allows users to browse information about Frederick County properties including real property information, plats, recycling collection calendars, zoning, water and sewer services, schools, libraries, police and fire districts, and parks. In this application you can also find an archive of historic imagery of the county ranging from 1952-2011, measuring tools, and much more.

To learn more about Frederick County GIS or to ask a GIS related question, visit or email