Welcome to the Department of Natural Resources' Geospatial Products and Services portal. Here you can search a listing of various maps that are located on our site. The types of maps you will find listed include, but are not limited to: Land and Water Trails, State Parks, State Forests, Wildlife Management Areas, Water Quality maps, and interactive mapping such as MERLIN Online. You can also obtain GIS data via our Data Download site or from an order form for data that is not available through the download site.

Obtain GIS

• Geospatial Data - Download GIS data for free.​
  

• Eyes on the Bay - Shows current monitoring sites and harmful algal bloom events. Also contains links to real-time data and news.
• Coastal Atlas - ​​The Coastal Atlas is powerful online mapping and planning tool that allows you to explore and analyze data for coastal and ocean planning activities.
• MERLIN Online - Map Maryland Your Way with Maryland's Environmental Resources and Land Information Network.
• Water Quality Mapping Data - A searchable database containing hundreds of water quality maps.