Maps, Publications and Online Data


The Maps and Publications Search allows you to find maps and publications by geographic area or subject.

Online Maps

Over 4000 geologic quadrangle maps and publications are now available online in PDF format. If you know the name of the quadrangle you are interested in, you may locate PDF files using the map series links below. These pages contain alphabetical lists of available maps by quadrangle. If you are unsure of the quadrangle name, use the Maps and Publications Search.

Digital Data

The following links give more detailed instructions for acquiring digital data related to a specific map series:

Web Maps

See the MGS Interactive and Customized Web Maps (PDF 0.8MB) document for an overview and helpful instructions for getting started using the MGS web maps.

Web Mapping Applications

Direct links to all web mapping applications published by MGS are listed below.

    Spatial Datasets

    Below is a complete listing of digital geologic datasets (shapefiles and/or web map services) published by MGS. These are also available from the Maine Geological Survey Open Data site and the Maine GeoLibrary. All datasets are available for download free of charge.

      ArcGIS Layer Files

      If you are an ArcGIS Desktop user, you can download ArcGIS Layer Files (.lyr) for use in your local client software.

      Printed Maps and Publications For Sale

      • Not all of the printed maps and publications are available online. Use the Maps and Publications Search to identify printed publications that can be purchased from the Maine Geological Survey. Or, if you know what you want, go directly to the ordering instructions.
      • Publications listed from the following agencies are available for sale from MGS in print form:
        • Maine Geological Survey
          • Geologic quadrangle maps
          • Regional geologic maps
          • Technical geologic reports
          • Popular geologic guidebooks
        • U.S. Geological Survey
          • Topographic maps at the following scales
            • 1:24,000 (707 maps cover the state)
            • 1:100,000 (35 maps cover the state)
            • 1:250,000 (13 maps cover the state)
            • 1:500,000 (1 map covers the state)
          • Selected geologic publications
        • U.S. Fish and Wildlife Service
          • National Wetlands Inventory maps
          • Selected wetlands publications

      Other Sources of Online Maps

      • U.S. Geological Survey
        • National Geologic Map Database - Search database developed by USGS in cooperation with the Association of American State Geologists. The database is a geoscience resource for maps and related data about: geology, hazards, earth resources, geophysics, geochemistry, geochronology, paleontology, and marine geology.
        • National Geologic Map Database - TopoView - View and download all scales of current and historical USGS topographic maps.
      • Maine State Library
        • GeoRef - worldwide geologic bibliography published by the American Geological Institute. Access for MAINE RESIDENTS ONLY is provided through the Maine State Library's MARVEL! virtual library.

      Publication Submission Guidelines

      The Maine Geological Survey accepts publications from outside the agency. If you are interested in collaboring with MGS or submitting a map or report for publication, please review the Publication Type Guidelines and the Report Submission Guidelines documents. Unfortunately, MGS does not have the capacity to publish everything that might be submitted to us from outside the agency. So before submitting an unsolicited map or report, please contact MGS staff to ensure that the submission is appropriate and can be handled in a way that meets the expectations of both parties.

      Last updated on November 8, 2021