Welcome to Frederick-County.org's Open GIS Platform! Here you will find county data from a variety of sources, organized around a familiar Google Maps interface.

This site leverages official data services hosted by Frederick County GIS, Google hosted services of public domain GIS data, and user contributed data from inside and outside of our community hosted on Google Fusion Tables and Open Street Map.

You can easily search for addresses in the search box, and discover everything we can find about that location. You can also turn on and off various geospatial data layers in the "Map Layers" panel below.