Cross-Island Topographic Profiles of Assateague Island National Seashore, Spring 2004

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Assateague Island National Seashore
Publication_Date: 20040701
Title:
Cross-Island Topographic Profiles of Assateague Island National Seashore, Spring 2004
Geospatial_Data_Presentation_Form: vector digital data
Online_Linkage: http://science.nature.nps.gov/nrdata
Description:
Abstract:
Cross-island profiles were collected during spring 2004, continuing transect monitoring begun in 1995. Elevations are collected every 10m and at all significant elevation changes along transects that run at a 291/111 degree azimuth. Elevations were collected using a Trimble 5700 GPS total station and referenced to the NAVD88 datum. These data are used to monitor and understand the dynamics of barrier islands and their associated dune complexes.
Purpose:
In 1995, Assateague Island National Seashore initiated a long-term program to begin monitoring key aspects of island geomorphology. One of the goals of this program was the documentation of cross-island beach profile elevation on a biannual basis in order to describe and evaluate trends in island topographic relief and storm-driven change. For this purpose a profile network baseline was established in 1993 and expanded in 1995. Surface elevations are recorded along beach profile transects during the fall and spring of each year. Special transect sessions are conducted to document the effect of storms and for LIDAR ground truthing. Transects have also been performed in conjunction with wildlife studies. 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 in understanding natural barrier island conditions as well as anthropogenic influences.
Supplemental_Information:
This is the first profile survey conducted entirely by GPS.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20040415
Ending_Date: 20040507
Currentness_Reference:
ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Half-yearly
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -75.231997
East_Bounding_Coordinate: -75.098339
North_Bounding_Coordinate: 38.317763
South_Bounding_Coordinate: 38.045731
Keywords:
Theme:
Theme_Keyword_Thesaurus: Assateague Island National Seashore Keyword Thesaurus
Theme_Keyword: coastal dynamics
Theme_Keyword: erosion
Theme_Keyword: geomorphology
Theme_Keyword: monitoring
Theme_Keyword: sand dunes
Theme_Keyword: shoreline change
Theme_Keyword: storms
Theme_Keyword: survey points
Theme_Keyword: topography
Theme_Keyword: elevation
Theme:
Theme_Keyword_Thesaurus: National Park Service Theme Category Thesaurus
Theme_Keyword: Elevation / Bathymetry
Theme_Keyword: Physical
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: elevation
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: MD
Postal_Code: 21811
Country: USA
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:
ASIS 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 9.2.2.1350
Cross_Reference:
Citation_Information:
Originator: Assateague Island National Seashore
Publication_Date: 2004
Title:
Metadata for
Geospatial_Data_Presentation_Form: vector digital data
Online_Linkage: http://nrdata.nps.gov/ASIS/ASISdata/ASIS_Profile_2004_2006.xml
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Attributes are accurate as recorded in the field or within the tolerances set in Trimble Geomatics Office.  There are no apparent inconsistencies in the attributes.
Logical_Consistency_Report:
Horizontal and vertical accuracy checks were conducted over known monuments and error was found to be <0.005m horizontal and <0.010m vertical at all monuments.  Data that did not meet RMS, PDOP, SNR and other criteria were discarded.
Completeness_Report:
All points 10 m apart were collected except when these locations were obstructed or the signal degraded such that data could not be recorded.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Horizontal accuracy is reported as <0.015m.  Positions with accuracy >0.015m are reported, however these positions are of suspect quality.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: <0.015m
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Vertical accuracy is reported as <0.015m.  Positions with accuracy >0.015m are reported, however these positions are of suspect quality.
Quantitative_Vertical_Positional_Accuracy_Assessment:
Vertical_Positional_Accuracy_Value: <0.015m
Lineage:
Process_Step:
Process_Description:
The profile network baseline, established by Taylor, Wisemann, and Taylor in 1993, and expanded by NPS personnel in 1995, was utilized for all data collection.  Individual profile lines were numbered in consecutive order from north to south and prefaced in text by GPS or NPS, denoting whether the baseline monument was established by Taylor, Wisemann, Taylor, or NPS respectively.  Spacing between GPS monuments is 2.0 km, with NPS monuments located approximately midway between GPS monuments.  The result is a profile line density of 1 km along the northern 10 km of Assateague Island (commonly referred to as the "North End"), and a 2 km density for the remainder of the island.  There are 22 profile transects collected.  

Profile surveys were conducted from each primary monument along a transect aligned to 291/11 degrees.  Each transect extended from <0m oceanside to <0m bayside or up to the point where vegetation obstructed passage or degraded the radio signals and initialization was lost.  The base station was set up on known monuments and all data collection was RTK.  The base station occupied GPS3, GPS5, North Beach 2, GPS10, and GPS15.  

A Trimble 5700 total station was used to collect elevations.  RTK collection was utilized with the base radio broadcasting at 25khz.  Elevations were collected along the defined "stake-out" transect at 10 m intervals.  Thus, elevations were taken at station 10, 20, 30 etc.  Elevations were also shot at any significant change in elevation along the profile line.  These points were calculated as staked-out points so that they fell on the line.  

The rover and base were set with an elevation mask of 12 degrees, SNR mask of 6.0, and PDOP mask of 6.0.  Data was examined in Trimble Geomatics Office and exported as an xyz table.  Data was also entered into the Profiles Database.
Process_Date: 200405
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: 410-641-1443
Contact_Facsimile_Telephone: 410-641-1099
Contact_Electronic_Mail_Address: asis_gis@nps.gov
Hours_of_Service: Mon thru Fri 0900 - 1600
Process_Step:
Process_Description:
Dataset copied.
Source_Used_Citation_Abbreviation:
C:\Documents and Settings\nick villa\Desktop\Profiles\ASIS_profile_20040415
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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: Entity point
Point_and_Vector_Object_Count: 1221
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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: 0.000000
Ordinate_Resolution: 0.000000
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_Datum_Name: North American Vertical Datum of 1988
Altitude_Resolution: 0.001
Altitude_Distance_Units: meters
Altitude_Encoding_Method: Attribute values
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Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: ASIS_topo_profiles_20040415
Entity_Type_Definition:
Spring 2004 Profiles of Assateague Island National Seashore
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: Point
Attribute_Definition:
point name
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Unrepresentable_Domain:
[Transect name][e/w][pointnumber]
Beginning_Date_of_Attribute_Values: 20040415
Ending_Date_of_Attribute_Values: 20040507
Attribute:
Attribute_Label: Transect
Attribute_Definition:
Transect name
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Unrepresentable_Domain:
[Transect name][e/w]
Beginning_Date_of_Attribute_Values: 20040415
Ending_Date_of_Attribute_Values: 20040507
Attribute:
Attribute_Label: Code
Attribute_Definition:
Code for point
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Unrepresentable_Domain:
[Transect name][e/w] or description of point
Beginning_Date_of_Attribute_Values: 20040415
Ending_Date_of_Attribute_Values: 20040507
Attribute:
Attribute_Label: Northing
Attribute_Definition:
Northing
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Unrepresentable_Domain:
Coordinate of point in UTM
Beginning_Date_of_Attribute_Values: 20040415
Ending_Date_of_Attribute_Values: 20040507
Attribute:
Attribute_Label: Easting
Attribute_Definition:
Easting
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Unrepresentable_Domain:
Coordinate of point in UTM
Attribute:
Attribute_Label: Elev_m
Attribute_Definition:
Elevation
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -1.023000
Range_Domain_Maximum: 5.968000
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.001
Beginning_Date_of_Attribute_Values: 20040415
Ending_Date_of_Attribute_Values: 20040507
Attribute_Value_Accuracy_Information:
Attribute_Value_Accuracy: see Vertical Precision
Attribute:
Attribute_Label: Height_m
Attribute_Definition:
Height above ellipsoid
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -37.390000
Range_Domain_Maximum: -30.209000
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.001
Beginning_Date_of_Attribute_Values: 20040415
Ending_Date_of_Attribute_Values: 20040507
Attribute:
Attribute_Label: Year
Attribute_Definition:
Year of collection
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Unrepresentable_Domain:
year of data collection
Beginning_Date_of_Attribute_Values: 2004
Ending_Date_of_Attribute_Values: 2004
Attribute:
Attribute_Label: Month
Attribute_Definition:
Month of collection
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Unrepresentable_Domain:
month of data collection
Beginning_Date_of_Attribute_Values: 200404
Ending_Date_of_Attribute_Values: 200405
Attribute:
Attribute_Label: Day
Attribute_Definition:
Day of month of collection
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Unrepresentable_Domain:
day of data collection
Beginning_Date_of_Attribute_Values: 20040415
Ending_Date_of_Attribute_Values: 20040507
Attribute:
Attribute_Label: Datum
Attribute_Definition:
Horizontal Datum
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Unrepresentable_Domain:
Datum name
Attribute:
Attribute_Label: Vdatum
Attribute_Definition:
Vertical datum
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Unrepresentable_Domain:
Datum name
Attribute:
Attribute_Label: Geoid
Attribute_Definition:
Geoid model
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Unrepresentable_Domain:
Geoid model used
Attribute:
Attribute_Label: HQuality
Attribute_Definition:
Horizontal Quality
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name: Survey Quality
Codeset_Source: ASIS
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name: Mapping Quality
Codeset_Source: ASIS
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name: Geodetic Quality
Codeset_Source: ASIS
Attribute:
Attribute_Label: VQuality
Attribute_Definition:
Vertical quality
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name: Survey Quality
Codeset_Source: ASIS
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name: Mapping Quality
Codeset_Source: ASIS
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name: Geodetic Quality
Codeset_Source: ASIS
Attribute:
Attribute_Label: HPrec
Attribute_Definition:
Horizontal Precision
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.003000
Range_Domain_Maximum: 0.036000
Attribute_Units_of_Measure: unit less
Attribute_Measurement_Resolution: 0.001
Beginning_Date_of_Attribute_Values: 20040415
Ending_Date_of_Attribute_Values: 20040507
Attribute:
Attribute_Label: VPrec
Attribute_Definition:
Vertical Precision
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.008000
Range_Domain_Maximum: 0.054000
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.001
Beginning_Date_of_Attribute_Values: 20040515
Ending_Date_of_Attribute_Values: 20040507
Attribute:
Attribute_Label: RMS
Attribute_Definition:
root mean square
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.001000
Range_Domain_Maximum: 0.011000
Attribute_Units_of_Measure: unit less
Attribute_Measurement_Resolution: 0.001
Attribute:
Attribute_Label: HDOP
Attribute_Definition:
Horizontal Dilution of Precision
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.576000
Range_Domain_Maximum: 60578000
Attribute_Units_of_Measure: unit less
Attribute_Measurement_Resolution: 0.001
Attribute:
Attribute_Label: RDOP
Attribute_Definition:
Rotational Dilution of Precision
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.980000
Range_Domain_Maximum: 13.771000
Attribute_Units_of_Measure: unit less
Attribute_Measurement_Resolution: 0.001
Attribute:
Attribute_Label: VDOP
Attribute_Definition:
Vertical Dilution of Precision
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.792000
Range_Domain_Maximum: 12.098000
Attribute_Units_of_Measure: unit less
Attribute_Measurement_Resolution: 0.001
Attribute:
Attribute_Label: GPSPos
Attribute_Definition:
Number of GPS positions averaged for data
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 15
Attribute_Units_of_Measure: epochs
Attribute_Measurement_Resolution: 1
Attribute:
Attribute_Label: MinSat
Attribute_Definition:
Minimum number of satellites used in averaging
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 6
Attribute_Measurement_Resolution: 1
Attribute:
Attribute_Label: Weather
Attribute_Definition:
major preceding weather events
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Unrepresentable_Domain:
used to record extreme weather conditions during data collection
Overview_Description:
Entity_and_Attribute_Overview:
Dataset includes horizontal and vertical positional information and precious and quality descriptions of the data at those locations.  The dataset also includes date information and information regarding the weather preceding data collection.
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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: MD
Postal_Code: 21811
Country: USA
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: 0.033
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: http://nrdata.nps.gov/ASIS/ASISdata/ASIS_Profile_2004_2006.zip
Fees: none
Available_Time_Period:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1995
Ending_Time: 2004
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Metadata_Reference_Information:
Metadata_Date: 20070828
Metadata_Review_Date: 20040706
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: MD
Postal_Code: 21811
Country: USA
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
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_Security_Information:
Metadata_Security_Classification: Unclassified
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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