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.
• Maryland R​estoration and Resilience Map - Supports restoration and climate resilience activities in Maryland for landscape and parcel assessment activities.​
  
• The Maryland Coastal Flood Explorer - Interactive mapper visualizing historic, current and future flooding for Maryland's Coastal Zone.
• BUILD (Beneficial Use: Identifying Locations for Dredge - Boating Services & BUILD data layers for locating dredge material sites for Maryland waters.
• GreenPrint - GreenPrint map displays terrestrial-focused data layers and highlights the Parcel Evaluation Tool.
• Trust Fund Targeting Map - Chesapeake and Atlantic Coastal Bays Trust Fund focuses on projects & applications for holistic, strategic, and cost-effective practices.