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Digital Data for Surficial Geology Maps

The Maine Geological Survey uses a geographic information system (GIS) in the production of its maps. The GIS data used in the production of Surficial Geology Maps is available for download. The GIS data is in Environmental Systems Research Institute (ESRI) shapefile format.

Available shapefiles for each quadrangle include the following:

• Unit contacts - surficial geologic unit lines
• Unit polygons - surficial geologic unit polygons
• Features - moraines, esker ridges, ice margin positions, etc.
• Points - striations, drumlins, fossil localities, etc.
• Thin drift - thin drift areas, boulder fields, disturbed earth, etc.

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This digital surficial geology data is current through 11/13/09. The digital data may not include information from the most recently published surficial geology maps. This data will be updated periodically but may be out of step briefly with published maps.

The user should check the source attributes associated with the surficial geology data (points/lines/polygons) and verify that the digital data reflects the current published map for the quadrangle. The user can view the most recently published maps or check the source for the cited open-file map in the Bibliography of Maine Geology by searching for the open-file number (e.g. 04-93) in the keyword search source field.

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The shapefiles are available by quadrangle in zipped file format. Click on the links below to download.

Alfred Augusta Bangor Bath Bar Mills Belgrade Bethel Biddeford Biddeford Pool Bowdoinham Bridgton Brownfield Brunswick Bryant Pond Buckfield Canton Cape Elizabeth Casco Center Lovell China Lake Cornish Cumberland Center Dover East East Stoneham Farmington Fayette Freeport Fryeburg Gardiner Gilead Gorham Gray Great East Lake Greenbush

Greenwood Hermon Hiram Kennebunk Kennebunkport Kezar Falls Kittery Lake Auburn East Lake Auburn West Lewiston Limerick Limington Lisbon Falls North Lisbon Falls South Livermore Falls Mechanic Falls Milton Minot Monmouth Mount Zircon Mousam Lake Naples North Berwick North Pownal North Sebago North Waterford North Windham Norway Old Orchard Beach Old Town Oxford Phillips Pleasant Mtn Portland East

Portland West Portsmouth Prouts Neck Purgatory Raymond Readfield Richmond Rochester Sanford Sebago Lake Somersworth South Harpswell Southwest Harbor Speckled Mountain Standish Steep Falls Strong Togus Pond Turner Center Vassalboro Veazie Waterboro Waterford Flat Wayne Wells Weeks Mills West Newfield West Paris West Sumner Winthrop Worthley Pond Yarmouth York Beach York Harbor

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Last updated on November 13, 2009

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