Overwash on the North End of Assateague Island National Seashore, March 2004

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Assateague Island National Seashore
Publication_Date: March 12, 2004
Title:
Overwash on the North End of Assateague Island National Seashore, March 2004
Geospatial_Data_Presentation_Form: vector digital data
Online_Linkage: http://science.nature.nps.gov/nrdata
Description:
Abstract:
Assateague Island is a barrier island subject to forces that dynamically alter the physical and biotic properties of the island. Winter storms are a major driver of change, causing shoreline erosion and often shaping interior island characteristics through overwash events. A small storm on March 10-11, 2004 caused the island to be overwashed in several locations. This dataset maps the extent of 6 of the overwash fans on the North End of the island. These areas were collected through a GPS on March 11, 2004 by walking the perimeter of the wet sand.
Purpose:
The purpose of this data set is to show the effects of overwash on the island and how rapidly this can reshape the shore. The dynamic nature of coastal barriers such as Assateague Island is a defining characteristic, influencing nearly every aspect of their ecology. Fundamentally disturbance driven systems, barrier islands and their endemic biota are continually shaped by physical forces on a time scale vastly accelerated in comparison to mainland systems. Because of the rapid pace and scope of change, long term monitoring is crucial towards understanding natural barrier island conditions as well as anthropogenic influences.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: March 11, 2004
Time of Day: 11:30-16:00
Currentness_Reference:
ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -75.136588
East_Bounding_Coordinate: -75.098458
North_Bounding_Coordinate: 38.317853
South_Bounding_Coordinate: 38.242488
Keywords:
Theme:
Theme_Keyword_Thesaurus: Assateague Island National Seashore Keyword Thesaurus
Theme_Keyword: Geomorphology
Theme_Keyword: Beach Dynamics
Theme_Keyword: Coastal Dynamics
Theme_Keyword: Overwash
Theme_Keyword: Storms
Theme:
Theme_Keyword_Thesaurus: National Park Service Theme Category Thesaurus
Theme_Keyword: Physical
Theme_Keyword: Landscape
Theme_Keyword: Water
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
Theme_Keyword: environment
Place:
Place_Keyword_Thesaurus: Geographic Names Information System
Place_Keyword: North America
Place_Keyword: Maryland
Place_Keyword: Worcester County
Place_Keyword: Assateague Island National Seashore
Place:
Place_Keyword_Thesaurus: National Park System Unit Name Thesaurus
Place_Keyword: Assateague Island National Seashore
Place:
Place_Keyword_Thesaurus: National Park System Unit Code Thesaurus
Place_Keyword: ASIS
Access_Constraints: None
Use_Constraints:
None
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Assateague Island National Seashore
Contact_Position: GIS Specialist
Contact_Address:
Address_Type: mailing and physical address
Address:
7206 National Seashore Lane
City: Berlin
State_or_Province: Maryland
Postal_Code: 21811
Country: United States
Contact_Voice_Telephone: 410-641-1443
Contact_Facsimile_Telephone: 410-641-1099
Contact_Electronic_Mail_Address: asis_gis@nps.gov
Hours_of_Service: Mon thru Fri 0900 - 1600
Data_Set_Credit:
Andrew Roach, Cartographic Technician
Security_Information:
Security_Classification_System: none
Security_Classification: Unclassified
Security_Handling_Description: none
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780
Cross_Reference:
Citation_Information:
Originator: Assateague Island National Seashore
Publication_Date: March 12, 2004
Title:
Metadata for Overwash on the North End of Assateague Island National Seashore, March 2004
Geospatial_Data_Presentation_Form: vector digital data
Online_Linkage: http://nrdata.nps.gov/ASIS/ASISdata/asis_overwash_20040311.xml
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Attributes are accurate as recorded.
Logical_Consistency_Report:
Data was scanned by eye and overlapping lines moved by hand.  No known topology errors are present.
Completeness_Report:
The data set is complete, however, several overwash areas between the northern most mapped overwash before the berm and the berm were not mapped.  These overwash areas occur relatively frequently and were not distinct in extent.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Horizontal accuracy is 0.3m (68%).
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
unknown
Lineage:
Process_Step:
Process_Description:
The perimeter of overwash fans were walked with a Trimble ProXR GPS.  Points were collected at 1 second intervals while logging a line feature with real-time differential correction.  PDOP<6, Elevation>15deg, SNR>6.  The features were differentially corrected post-process with base station data from VIMS with 100% coverage.  The corrected feature was examined onscreen and overlapping lines were moved by hand.
Process_Date: March 12, 2004
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Assateague Island National Seashore
Contact_Position: GIS Specialist
Contact_Address:
Address_Type: mailing and physical address
Address:
7206 National Seashore Lane
City: Berlin
State_or_Province: MD
Postal_Code: 21811
Country: USA
Contact_Voice_Telephone: 410-649-1443
Contact_Facsimile_Telephone: 410-641-1099
Hours_of_Service: Mon thru Fri 0900 - 1600
Cloud_Cover: none
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Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 16
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Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 18
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -75.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000016
Ordinate_Resolution: 0.000016
Planar_Distance_Units: meters
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
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Resolution: 0.000001
Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates
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Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: asis_overwash_20040311
Entity_Type_Definition:
Overwash on Assateague Island National Seashore in 2004
Entity_Type_Definition_Source:
ASIS
Attribute:
Attribute_Label: FID
Attribute_Definition:
Internal feature number.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition:
Feature geometry.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Coordinates defining the features.
Attribute:
Attribute_Label: Comment
Attribute_Definition:
Field that was used during data collection
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Unrepresentable_Domain:
describes feature
Attribute:
Attribute_Label: Date
Attribute_Definition:
Date of data collection
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Unrepresentable_Domain:
day, month, and year that data was collected
Attribute:
Attribute_Label: Time
Attribute_Definition:
time feature collection began
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Unrepresentable_Domain:
time that data collection was started
Beginning_Date_of_Attribute_Values: March 11, 2004
Ending_Date_of_Attribute_Values: March 11, 2004
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Assateague Island National Seashore
Contact_Position: GIS Specialist
Contact_Address:
Address_Type: mailing and physical address
Address:
7206 National Seashore Lane
City: Berlin
State_or_Province: Maryland
Postal_Code: 21811
Country: United States
Contact_Voice_Telephone: 410-641-1443
Contact_Facsimile_Telephone: 410-641-1099
Contact_Electronic_Mail_Address: asis_gis@nps.gov
Hours_of_Service: Mon thru Fri 0900 - 1600
Resource_Description: Downloadable Data
Distribution_Liability:
The National Park Service shall not be held liable for improper or incorrect use of the data described and/or contained herein. These data and related graphics (i.e. "GIF or JPG" format files) are not legal documents and are not intended to be used as such. The information contained in these data is dynamic and may change over time. The data are not better than the original sources from which they are derived. It is the responsibility of the data user to use the data appropriately and consistent within the limitations of geospatial data in general and these data in particular. The related graphics are intended to aid the data user in acquiring relevant data; it is not appropriate to use the related graphics as data. The National Park Service gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of these data. It is strongly recommended that these data are directly acquired from an NPS server and not indirectly through other sources which may have changed the data in some way. Although these data have been processed successfully on computer systems at the National Park Service, no warranty expressed or implied is made regarding the utility of the data on other systems for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: shp
Transfer_Size: 0.075
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: http://nrdata.nps.gov/ASIS/ASISDATA/asis_overwash_20040311.zip
Fees: none
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: March 11, 2004
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Metadata_Reference_Information:
Metadata_Date: 20070206
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Assateague Island National Seashore
Contact_Position: GIS Specialist
Contact_Address:
Address_Type: mailing and physical address
Address:
7206 National Seashore Lane
City: Berlin
State_or_Province: Maryland
Postal_Code: 21811
Country: United States
Contact_Voice_Telephone: 410-649-1443
Contact_Facsimile_Telephone: 410-649-1099
Contact_Electronic_Mail_Address: asis_gis@nps.gov
Hours_of_Service: Mon thru Fri 0900 - 1600
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Access_Constraints: none
Metadata_Use_Constraints:
none
Metadata_Extensions:
Online_Linkage: http://nrdata.nps.gov/profiles/nps_profile.xml
Profile_Name: NPS Metadata Profile
Metadata_Extensions:
Online_Linkage: http://www.esri.com/metadata/esriprof80.html
Profile_Name: ESRI Metadata Profile
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