New Hampshire Beach Shoreline Change

Metadata:

• Identification_Information
• Entity_and_Attribute_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator:

New Hampshire Geological Survey, New Hampshire Department of Environmental Services

Publication_Date: 20160129

Title: New Hampshire Beach Shoreline Change

Geospatial_Data_Presentation_Form: vector digital data

Online_Linkage:

<URL:http://www.granit.unh.edu/cgi-bin/nhsearch?dset=beachshorelinechange/nh>

Description:

Abstract:

To assess both the stability (landward or seaward migration) of the New Hampshire coastline and volumetric changes of the beaches, short-term changes (years) were analyzed using lidar data and long-term trends (decades) were analyzed using shorelines drawn from charts and orthophography. Multiple vintages of airborne lidar spanning the last decade and a half were analyzed to detect changes in volume of sand and gravel beaches of New Hampshire's coast using a simple DEM of Difference (DOD). The trend of the shoreline position was determined for shore-perpendicular transects using the Digital Shoreline Analysis System (DSAS).

The data are distributed as a geodatabase with 18 feature classes. They include: 9 DoDs clipped to the landward area of the beach named as DoD_(latest year)_(earliest year)_clip, a series of beach polygons used for the clipping, and a single shoreline feature class (shorelines_merge) that represents shoreline position merged from 23 individual shoreline representations dating back to the mid-1800's.

For detailed information on the content of the database, please see two related documents - BOEM_Rept_Change_Analysis_Olson_D20160129_NFO_final.pdf, which is the final report on the project as prepared for the sponsoring agency (Bureau of Ocean Energy Management), and BeachShorelineChangeNotes.doc, which provides additional detailed information on the data sources used for the mapping and the processing methodology.

The distribution geodatabase contains the primary project results. The full project geodatabase may be acquired by contacting Frederick Chormann, NH State Geologist (see Point of Contact section below).

Purpose:

The purpose of these data are to evaluate the stability of the New Hampshire coastline as well as volumetric changes of the beaches.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1855

Ending_Date: 2015

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -72.590654

East_Bounding_Coordinate: -70.581047

North_Bounding_Coordinate: 45.268974

South_Bounding_Coordinate: 42.692927

Keywords:

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: biota

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: New Hampshire

Theme_Keyword: Coast

Theme_Keyword: Coastline

Theme_Keyword: Beaches

Theme_Keyword: Shoreline

Theme_Keyword: Shoreline Change

Theme_Keyword: Accretion

Theme_Keyword: Erosion

Place:

Place_Keyword_Thesaurus: ISO 19115 Topic Category

Place_Keyword: oceans

Place_Keyword: Northeast

Place_Keyword: New England

Place_Keyword: New Hampshire

Access_Constraints: None

Use_Constraints:

The Department of Environmental Services (NHDES) makes these data and information available to enhance public knowledge and promote education. The data provided should not be used for navigational purposes and are not intended to identify the official mean high tide line demarcating the public trust boundary. DES cannot guarantee accuracy and reliability of these data. NHDES also retains the right to make changes to the data made available without prior notice. Neither NHDES nor any of its employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any data, nor represent that its use would not infringe on privately owned rights. The data are provided with the understanding that they are not guaranteed to be usable, timely, accurate, or complete. NHDES assumes no liability, any damages or loss of any kind that might arise from the use of, misuse of, or the inability to use these data. NHDES assumes no liability for any damages or loss of any kind caused by any errors or omissions in the data. All data are distributed "as is," without warranties of any kind, either express or implied, and subject to the terms and conditions stated in this disclaimer.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Frederick Chormann

Contact_Organization:

New Hampshire Geological Survey, New Hampshire Department of Environmental Services

Contact_Position: NH State Geologist

Contact_Address:

Address_Type: Mailing and Physical Address

Address: 29 Hazen Drive, PO Box 95

City: Concord

State_or_Province: New Hampshire

Postal_Code: 03302-0095

Contact_Electronic_Mail_Address: frederick.chormann@des.nh.gov

Contact_Voice_Telephone: 603-271-1975

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Detail_Citation: None

Entity_and_Attribute_Overview: See BOEM_Rept_Change_Analysis_Olson_D20160129_NFO_final.pdf.

Metadata_Reference_Information:

Metadata_Date: 20160129

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

New Hampshire Geological Survey, New Hampshire Department of Environmental Services

Contact_Person: Frederick Chormann

Contact_Address:

Address_Type: unknown

Address: 29 Hazen Drive, PO Box 95

City: Concord

State_or_Province: NH

Postal_Code: 03302-0095

Contact_Voice_Telephone: (603) 291-1975

Contact_Electronic_Mail_Address: frederick.chormann@des.nh.gov

Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time