Metadata: Identification_Information: Citation: Citation_Information: Originator: Earth Systems Research Center, University of New Hampshire Publication_Date: 20230410 Title: Sea Level Rise - New Hampshire Open Coast, Piscataqua River, and Great Bay Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Durham, New Hampshire Publisher: Earth Systems Research Center, University of New Hampshire Other_Citation_Details: None Online_Linkage: Larger_Work_Citation: Citation_Information: Originator: Earth Systems Research Center, University of New Hampshire Publication_Date: 19860101 Title: NH GRANIT Database Publication_Information: Publication_Place: Durham, New Hampshire Publisher: Earth Systems Research Center, University of New Hampshire Online_Linkage: Description: Abstract: The database contains predicted sea level rise extent layers and baseline layers for the open coast of New Hampshire, the Piscataqua River, and Great Bay and comprise the following eleven scenarios: p_MHHW_1_foot_slr: Mean higher high water + 1' sea level rise p_MHHW_2_foot_slr: Mean higher high water + 2' sea level rise p_MHHW_4_foot_slr: Mean higher high water + 4' seal level rise p_MHHW_6_foot_slr: Mean higher high water + 6' seal level rise p_MHHW_8_foot_slr: Mean higher high water + 8' seal level rise p_MHHW_baseline: baseline elevations from which the MHHW sea level rise layers were derived p_MHHW_FLOOD_2_foot_slr: Mean higher high water + one percent annual chance flood + 2' seal level rise p_MHHW_FLOOD_4_foot_slr: Mean higher high water + one percent annual chance flood + 4' seal level rise p_MHHW_FLOOD_6_foot_slr: Mean higher high water + one percent annual chance flood + 6' seal level rise p_MHHW_FLOOD_8_foot_slr: Mean higher high water + one percent annual chance flood + 8' seal level rise p_MHHW_FLOOD_baseline: baseline elevations from which the MHHW_FLOOD sea level rise layers were derived The four data layers that incorporate the 100-year flood are based on the April, 2014 preliminary Digital Flood Insurance Rate Maps (DFIRMs) for Rockingham and Strafford Counties. Purpose: The data are intended to provide communities, coastal managers, scientists, and the public with a preliminary assessment of the extent of potential sea level rise. Supplemental_Information: Data distribution tile: regional Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20191123 Ending_Date: 20200423 Currentness_Reference: Ground conditions Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -71.083084 East_Bounding_Coordinate: -70.467173 North_Bounding_Coordinate: 43.285349 South_Bounding_Coordinate: 42.815572 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Bathymetry/Topography Theme_Keyword: Elevation Theme_Keyword: Digital Elevation Model Theme_Keyword: DEM Theme_Keyword: LiDAR Theme_Keyword: Inundation Theme_Keyword: Flooding Theme_Keyword: Topography Theme_Keyword: Sea Level Rise Place: Place_Keyword_Thesaurus: None Place_Keyword: United States Place_Keyword: Northeast Place_Keyword: New England Place_Keyword: New Hampshire Place_Keyword: New Hampshire coastline Access_Constraints: None Use_Constraints: The data are intended for planning purposes only and are not for legal or engineering use. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Earth Systems Research Center Contact_Person: GRANIT Database Manager Contact_Position: GRANIT Database Manager Contact_Address: Address_Type: mailing and physical address Address: Morse Hall, University of New Hampshire City: Durham State_or_Province: NH Postal_Code: 03824 Country: US Contact_Voice_Telephone: 603-862-1214 Contact_Facsimile_Telephone: 603-862-0188 Contact_Electronic_Mail_Address: granit@unh.edu Hours_of_Service: 8:30AM-5PM, EST Data_Set_Credit: NH GRANIT, Earth Systems Research Center, University of New Hampshire Native_Data_Set_Environment: ESRI geodatabase Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Attributes were generated during the geoprocessing and verified by logical and visual validation. Logical_Consistency_Report: The data layers were evaluated to ensure logical progressions in the depth values. Completeness_Report: The data are complete for the region. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The data were derived from the coastal New Hampshire LiDAR collection (2020), with a 1/25-foot GSD (or 0.35-meter nominal pulse spacing). Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Vertical accuracy of the coastal LiDAR is 10.0 centimeters RMSEz or better. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: NV5 Geospatial, powered by Quantum Spatial Publication_Date: 20210621 Title: NH Coastal Lidar Work Package 183374, Work Unit 183464; DEM Type_of_Source_Media: None Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20191123 Ending_Date: 20200423 Source_Currentness_Reference: Ground_Condition Source_Citation_Abbreviation: LIDAR Source_Contribution: 1.25-foot LiDAR DEM Source_Information: Source_Citation: Citation_Information: Originator: FEMA Publication_Date: 20140409 Title: Preliminary DFIRMs (Digital Flood Insurance Rate Maps) - Rockingham and Strafford Counties, NH Type_of_Source_Media: None Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20140409 Source_Currentness_Reference: Ground_Condition Source_Citation_Abbreviation: FLOODPLAINS Source_Contribution: Provided data for the 1% annual flood chance scenarios. Source_Information: Source_Citation: Citation_Information: Originator: AECOM Publication_Date: 2018 Title: Processing ZONES layer Type_of_Source_Media: None Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2018 Source_Currentness_Reference: none Source_Citation_Abbreviation: ZONES Source_Contribution: Provided zone polygons by which the MHHW and 1% flood depths were supplied to the processing Process_Step: Process_Description: Sea Level Rise rasters were developed by ESRC using the methodologies established by AECOM as reported in the related document: "Sea Level Rise Mapping Data - New Hampshire Open Coast, Piscataqua River, and Great Bay". The following describes the general workflow used to process each layer: 1) Convert ZONES to a raster layer based on the elevation value for the given SLR scenario 2) Subtract LIDAR from the raster version of ZONES for SLR1 3) Create SLR2 where values from the SLR1 >= 0 4) Create SLR3 to create pixel clusters 5) Create SLR4 where pixel clusters from SLR3 > 27878 6) Create SLR5 by running the ArcGIS "Fill" geoprocessing tool to fill sinks in SLR4 7) Create SLR6 by running the ArcGIS "Focal Statistics" tool to smmoth SLR5 (using Rectangle Neighborhood and the Majority statistic) 8) Convert SLR6 to integer raster to produce final raster contained in SLR geodatabase Source_Used_Citation_Abbreviation: ZONES and LIDAR Process_Date: 2023 Source_Produced_Citation_Abbreviation: SLR geodatabase Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Transverse Mercator Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999967 Longitude_of_Central_Meridian: -71.666667 Latitude_of_Projection_Origin: 42.500000 False_Easting: 984250.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000328 Ordinate_Resolution: 0.000328 Planar_Distance_Units: survey feet Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Detail_Citation: None Entity_and_Attribute_Overview: Each feature class contains a "gridcode" field reporting 2-foot classes of estimated inundation depth. This value represents depth of water (in feet) above the original surface. The classes are: 2: 0-2 4: 2-4 6: 4-6 8: 6-8 10: 8-10 12: 10-12 14: 12-14 16: 14-16 18: 16-18 20: 18-20 22: 20-22 24: 22-24 26: 24-26 28: 26-28 30: 28-30 32: 30+ Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Earth Systems Research Center, University of New Hampshire Contact_Person: GRANIT Database Manager Contact_Position: GRANIT Database Manager Contact_Address: Address_Type: mailing and physical address Address: Morse Hall, University of New Hampshire City: Durham State_or_Province: NH Postal_Code: 03824 Contact_Voice_Telephone: 603-862-1214 Contact_Facsimile_Telephone: 603-862-0188 Contact_Electronic_Mail_Address: granit@unh.edu Hours_of_Service: 8:30AM - 5 PM, EST Resource_Description: Downloadable Data Distribution_Liability: Digital data in NH GRANIT represent the efforts of the contributing agencies to record information from the cited source materials. Earth Systems Research Center, under contract to the NH Office of Energy and Planning, and in consultation with cooperating agencies, maintains a continuing program to identify and correct errors in these data. OEP, ESRC, and the cooperating agencies make no claim as to the validity or reliability or to any implied uses of these data. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ESRI geodatabase Transfer_Size: 1480 Digital_Transfer_Option: Offline_Option: Offline_Media: CD-ROM Recording_Format: ESRI geodatabase Fees: No charge when downloaded from website. Cost of reproduction for provision on CD/DVD or other media. Metadata_Reference_Information: Metadata_Date: 20230410 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Earth Systems Research Center Contact_Person: GRANIT Database Manager Contact_Position: GRANIT Database Manager Contact_Address: Address_Type: physical Address: 8 College Rd City: Durham State_or_Province: New Hampshire Postal_Code: 03824 Country: US Contact_Voice_Telephone: 603-862-1214 Contact_Facsimile_Telephone: 603-862-0188 Contact_Electronic_Mail_Address: granit@unh.edu Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time