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WGS_1984_Web_Mercator_Auxiliary_Sphere
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Maryland Mean Higher High Water Plus 3ft 0in
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The dataset represents projected sea-level rise depths(ft) at a 6-inch interval above MHHW (3ft 0in).
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This dataset represents flood inundation values derived from a modified bathtub model. It employs a simplified hydrologic connection approach rather than a full engineering-grade hydrologic network analysis. To improve data clarity, presumed hydrologically unconnected inundation areas smaller than 1/10 acre have been removed to reduce noise in the underlying elevation data. Additionally, areas presumed hydrologically unconnected and larger than 1/10 acre have their expected depth values reset to an unknown placeholder (e.g., 99999) to highlight their unverified status.</SPAN></P><P><SPAN /></P><P><SPAN>The base elevation data are sourced from the most recent county LiDAR collection available at the time of the study, with datum transformations applied from NAVD88 to tidal MHHW using corresponding NOAA tide stations as control points. The methodology is adapted from NOAA’s "Detailed Method for Mapping Sea Level Rise Inundation" (January 2017): NOAA Report.</SPAN></P><P><SPAN>https://coast.noaa.gov/data/digitalcoast/pdf/slr-inundation-methods.pdf</SPAN></P><P><SPAN /></P><P><SPAN>Last Updated: 03/03/2025</SPAN></P></DIV></DIV></DIV>
NOAA, DNR, ESRGC, MDiMAP
Maryland
MD
Department of Natural Resources
DNR
Eastern Regional GIS Cooperative
ESRGC
MD iMAP
Weather
WEAT
Raster
Coastal
Flood
Explorer
Mean Higher High Water
MHHW
Sea-level
Change
Rise
Inundation
Feet
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The information contained in Spatial Data is from publicly available sources, but no representation is made as to the accuracy or completeness of Spatial Data. The Department of Natural Resources, Eastern Shore Regional GIS Cooperative, and their employees and contractors, hereinafter referred to as The Contributors, shall not be subject to liability for human error, error due to software conversion, defect, or failure of machines, or any material used in the connection with the machines, including tapes, disks, CD-ROMs or DVD-ROMs and energy. The Contributors, shall not be liable for any lost profits, consequential damages, or claims against them by third parties. The liability of The Contributors for damage regardless of the form of the action shall not exceed any distribution fees that may have been paid in obtaining Spatial Data.</SPAN></P><P><SPAN>Spatial Data provided herein is not recommended for use in engineering or site design criteria, and The Contributors, shall not be liable for any lost profits, consequential damages, or claims against The Contributors by third parties.</SPAN></P></DIV></DIV></DIV>
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