Oceans feature dataset for Maine
Feature class Description Publication Date
bathgmp_clip Bathymetry (polygons) downloaded from Mass GIS and clipped by GOMP to remove upland areas; inshore areas not as detailed as bathy30 GRID; depths are in meters. 1999
bathym100 Bathymetry lines for Gulf of Maine at 1:100,000 scale showing depth in 10 meter intervals. Developed by Maine Geologic Survey. See metadata in ArcCatalog. Downloaded from MEGIS 9/2010. 1999
CMGE Coastal Marine Geologic Environments 1976
coast Older version of Maine coastline and coastal islands out to 3 mile limit. Hyd24p is updated (2004) and should now be used. uncertain
HAT_2015lines This feature class represents the approximate extent of the inland limits of the 2015 predicted Highest Annual Tide (HAT) along the Maine coastline. The yearly HAT serves as the regulatory boundary for the coastal wetland under Maine's Mandatory Shoreland Zoning. Mapping was produced in 2015 by P. A. Slovinsky, C.D. Adams, and C. H. Halsted of the Maine Geological Survey. More information/viewer available. Metadata available in ArcCatalog. GOMP acquired 2/2017. 2015
HAT1m_undeveloped blocks Undeveloped areas of the Maine coast within 300 m of highest annual tide in a 1 m (3.3 feet) sea level rise simulation. From MNAP Coastal Resiliency, link to online viewer/information. 2/2017
HAT2015Plus1Foot This feature class represents the approximate extent of inundation on the Maine coast during the 2015 Highest Annual Tide (HAT) plus 1 foot of additional sea level rise or storm surge. Mapping was produced in 2015 by P. A. Slovinsky, C.D. Adams, and C. H. Halsted of the Maine Geological Survey. More information/viewer available. Metadata available in ArcCatalog. GOMP acquired 2/2017. 2015
HAT2015Plus2Foot This feature class represents the approximate extent of inundation on the Maine coast during the 2015 Highest Annual Tide (HAT) plus 2 foot of additional sea level rise or storm surge. Mapping was produced in 2015 by P. A. Slovinsky, C.D. Adams, and C. H. Halsted of the Maine Geological Survey. More information/viewer available. Metadata available in ArcCatalog. GOMP acquired 2/2017. 2015
HAT2015Plus1Meter This feature class represents the approximate extent of inundation on the Maine coast during the 2015 Highest Annual Tide (HAT) plus one meter of additional sea level rise or storm surge. Mapping was produced in 2015 by P. A. Slovinsky, C.D. Adams, and C. H. Halsted of the Maine Geological Survey. 1 information/viewer available. Metadata available in ArcCatalog. GOMP acquired 2/2017. 2015
HAT2015Plus6Foot This feature class represents the approximate extent of inundation on the Maine coast during the 2015 Highest Annual Tide (HAT) plus 6 feet of additional sea level rise or storm surge. Mapping was produced in 2015 by P. A. Slovinsky, C.D. Adams, and C. H. Halsted of the Maine Geological Survey. More information/viewer available. Metadata available in ArcCatalog. GOMP acquired 2/2017. 2015
MM_1ft Potential future marsh migration areas; low lying areas that are adjacent to tidal estuaries that could be inundated at highest annual tide if sea level is increased by 1 foot. More information/viewer available. Metadata available in ArcCatalog. Also see SLR-Marsh Migration_Final Report_MNAP.pdf report in \\GIS\ME\mnap 2/2017
MM_2ft Potential future marsh migration areas; low lying areas that are adjacent to tidal estuaries that could be inundated at highest annual tide if sea level is increased by 2 foot. More information/viewer available. Metadata available in ArcCatalog. 2/2017
MM_1m Potential future marsh migration areas; low lying areas that are adjacent to tidal estuaries that could be inundated at highest annual tide if sea level is increased by 1 meter. More information/viewer available. Metadata available in ArcCatalog. 2/2017
MM_6ft Potential future marsh migration areas; low lying areas that are adjacent to tidal estuaries that could be inundated at highest annual tide if sea level is increased by 6 feet. More information/viewer available. Metadata available in ArcCatalog. 2/2017
ocean_polygon Polygon representing part of the Gulf of Maine outside the 3-mile Maine limit. Can be used as general fill for mapping. uncertain
phim Updated with 2017 data from USACOE.
Potential Hurricane Inundation Mapping. Areas along the Maine coast that might potentially be inundated by storm tides (the combination of a predicted tide and storm surge) under scenarios of landfalling Category 1 or 2 storms at either mean tide or mean high tide. The maps also show a calculated +20% potential flooding uncertainty band associated with each scenario. See MGS website for more info.
2014
SLR_Storm_Surge_Scenarios_2018 This feature class represents the approximate extent of inundation on the Maine coast during a Highest Astronomical Tide. The Highest Astronomical Tide is the elevation of the highest predicted astronomical tide expected to occur at a specific tide station over the National Tidal Datum Epoch (currently, 1983-2001). Subsequent feature classes represent approximate static inundation after scenarios of 1.2, 1.6, 3.9, 6.1, 8.8, and 10.9 feet of potential sea level rise, or storm surge, on top of the Highest Astronomical Tide. Mapping was produced in 2018 by P. A. Slovinsky, S. Rickerich, and C. H. Halsted of the Maine Geological Survey. More info available. Also see 2017 NOAA TechReport83 in NOAA folder \GIS\GOM\NOAA or online. 2018
SLR_2018_NOTES Map Notes was provided so data users could easily identify areas where there may have been issues in creating the inundation data, such as areas of poor LIDAR return, the influence of freshwater flow, dams, etc. 2018
tidal_marshes Currently existing tidal marshes in Maine as determined by MNAP. 2/2017

 


Last updated: June 12, 2019