January 2005 Elevation Survey of the ASIS North End Constructed Berm Nocthes

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: ASIS GIS Staff
Publication_Date: 200507
Title:
January 2005 Elevation Survey of the ASIS North End Constructed Berm Nocthes
Geospatial_Data_Presentation_Form: vector digital data
Online_Linkage: http://science.nature.nps.gov/nrdata
Description:
Abstract:
After severe Nor'easter storms in January and February, 1998, a constructed berm was installed on the northend of Assateague Island through a partnership including Assateague Island National Seashore, US Army Corps of Engineers, and MD Department of Natural Resources. In 2002, the berm was rebuilt, and in January 2005, notches were created through the berm by a bulldozer in an attempt to re-introduce natural overwash processes. These notches are monitored every month, through collecting elevation surveys, in addition to one survey prior to the notching. These surveys can be used to create an elevation surface.
Purpose:
This survey was collected immediatly after the notches were created in January, 2005. This is the first of monthly monitoring surveys to examine how the notches are evolving. This survey can also be used with the pre-notch dataset to determine how much sediment was moved from the berm.
Supplemental_Information:
Elevations will be collected over each notch once a month, except for May - Aug, during which the threatened Piping Plover nests in these locations. These surveys are stored as shapefiles, and titled 'asisberm_notchYYYYMM', where YYYY stands for the year, and MM stands for the month of the survey.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20050113
Ending_Date: 20050119
Currentness_Reference:
ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Monthly
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -75.126453
East_Bounding_Coordinate: -75.117641
North_Bounding_Coordinate: 38.279709
South_Bounding_Coordinate: 38.260793
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: survey points
Theme_Keyword: topography
Theme_Keyword: elevation
Theme_Keyword: berm
Theme_Keyword: North End
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
Temporal:
Temporal_Keyword_Thesaurus: Calendar
Temporal_Keyword: January
Temporal_Keyword: Winter
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 - Fri 9am - 4pm
Data_Set_Credit:
ASIS GIS Staff
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722
Cross_Reference:
Citation_Information:
Originator: ASIS GIS Specialist
Publication_Date: 200507
Title:
Metadata for Notch Elevation Surveys on the ASIS Constructed Berm
Online_Linkage: http://nrdata.nps.gov/ASIS/ASISdata/asisberm_notchsurveys.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.  Attributes that were not accurate were corrected in Trimble Geomatics Office.
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:
Each of the six notches were surveyed and data points were collected at an average spacing of 2-4 meters, or when breaks in slope were encountered.
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
Horizontal_Positional_Accuracy_Explanation:
See accuracy report.
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
Vertical_Positional_Accuracy_Explanation:
See accuracy report.
Lineage:
Process_Step:
Process_Description:
The number and location of notches along the constructed berm were determined by Assateague Island NS Resource Management staff and US Army Corps of Engineers.  Once a month these notches are surveyed to determine how they are developing and if overwash is occuring.

The location of each notch was initially staked out, and can now be found through this and the other previous surveys.

A Trimble 5700 total station was used to collect the elevation points.  RTK collection was utilized with the base radio broadcasting at 25khz.  The base station was set up on known monuments and all data collection was RTK.  The base station occupied GPS3 or GPS5.  The exact location can be found in the Trimble Geomatics Office original data file.

The surveyor used the rover unit, and walked parrell to the shore, perpendicular to the berm notch, back and forth, and collected a point at every 5 seconds or break in slope.  This allows for a spacing of 2-4 meters, so there is enough time left to balance the rover pole.

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 a x,y,z table, which was then converted into a ESRI GIS shapefile.
Process_Date: 200501
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:
7026 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
Hours_of_Service: Mon - Fri 9am - 4pm
Cloud_Cover: 0
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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: 3291
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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: 0.000001
Ordinate_Resolution: 0.000001
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: millimeters
Altitude_Distance_Units: meters
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: asisberm_notch200501
Entity_Type_Definition:
attributes for the ASIS berm pre-notch surveys
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_Value_Accuracy_Information:
Attribute_Value_Accuracy: n/a
Attribute_Value_Accuracy_Explanation:
n/a
Attribute:
Attribute_Label: Shape
Attribute_Definition:
Feature geometry.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Feature type.
Attribute_Value_Accuracy_Information:
Attribute_Value_Accuracy: n/a
Attribute_Value_Accuracy_Explanation:
n/a
Attribute:
Attribute_Label: Name
Attribute_Definition:
Name of survey point, first character represents notch number (from north to south), 'n' or 'nn' stands for notch and serves as a seperator, second number is a unique sequential whole number for each point in the notch survey.
Attribute_Definition_Source:
Trimble Geomatics Office
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated for each notch in the survey.
Attribute_Value_Accuracy_Information:
Attribute_Value_Accuracy: n/a
Attribute_Value_Accuracy_Explanation:
n/a
Attribute:
Attribute_Label: Descript
Attribute_Definition:
Point description (if needed).
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name: Comments
Codeset_Source: ASIS
Attribute_Value_Accuracy_Information:
Attribute_Value_Accuracy: n/a
Attribute_Value_Accuracy_Explanation:
n/a
Attribute:
Attribute_Label: FeatCode
Attribute_Definition:
Comments recorded by surveyor, most often signifies the notch number (from north to south).
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Unrepresentable_Domain:
Comments recorded by surveyor.
Attribute_Value_Accuracy_Information:
Attribute_Value_Accuracy: n/a
Attribute_Value_Accuracy_Explanation:
n/a
Attribute:
Attribute_Label: Northing
Attribute_Definition:
Northing coordinate in UTM, Zone 18, NAD83
Attribute_Definition_Source:
UTM Projection
Attribute_Domain_Values:
Unrepresentable_Domain:
Coordinates describing point location.
Attribute_Value_Accuracy_Information:
Attribute_Value_Accuracy: 0.015m
Attribute_Value_Accuracy_Explanation:
horizontal accuracy of 0.015m
Attribute:
Attribute_Label: Easting
Attribute_Definition:
Easting coordinate in UTM, Zone 18, NAD83
Attribute_Definition_Source:
UTM Projection
Attribute_Domain_Values:
Unrepresentable_Domain:
Coordinates describing point location.
Attribute_Value_Accuracy_Information:
Attribute_Value_Accuracy: 0.015m
Attribute_Value_Accuracy_Explanation:
horizontal accuracy of 0.015m
Attribute:
Attribute_Label: Elevation
Attribute_Definition:
Elevation of each point in NAVD88
Attribute_Definition_Source:
NAVD88
Attribute_Domain_Values:
Unrepresentable_Domain:
Coordinates describing point location.
Attribute_Value_Accuracy_Information:
Attribute_Value_Accuracy: 0.015m
Attribute_Value_Accuracy_Explanation:
vertical accuracy of 0.015m
Attribute:
Attribute_Label: Year
Attribute_Definition:
Year of data collection.
Attribute_Definition_Source:
Calendar
Attribute_Domain_Values:
Unrepresentable_Domain:
Year of data collection.
Attribute_Value_Accuracy_Information:
Attribute_Value_Accuracy: n/a
Attribute_Value_Accuracy_Explanation:
n/a
Attribute:
Attribute_Label: Month
Attribute_Definition:
Month of data collection.
Attribute_Definition_Source:
Calendar.
Attribute_Domain_Values:
Unrepresentable_Domain:
Month of data collection.
Attribute_Value_Accuracy_Information:
Attribute_Value_Accuracy: n/a
Attribute_Value_Accuracy_Explanation:
n/a
Attribute:
Attribute_Label: Day
Attribute_Definition:
Day of data collection.
Attribute_Definition_Source:
Calendar.
Attribute_Domain_Values:
Unrepresentable_Domain:
Day of data collection.
Attribute_Value_Accuracy_Information:
Attribute_Value_Accuracy: n/a
Attribute_Value_Accuracy_Explanation:
n/a
Attribute:
Attribute_Label: Time
Attribute_Definition:
Time of data collection.
Attribute_Definition_Source:
Local time (EST).
Attribute_Domain_Values:
Unrepresentable_Domain:
Time of data collection, down to the second.
Attribute_Value_Accuracy_Information:
Attribute_Value_Accuracy: n/a
Attribute_Value_Accuracy_Explanation:
n/a
Attribute:
Attribute_Label: Latitude
Attribute_Definition:
Point coordinate latitude in a geographic projection, NAD83.
Attribute_Definition_Source:
Trimble Geomatics
Attribute_Domain_Values:
Unrepresentable_Domain:
Coordinates describing point location.
Attribute_Value_Accuracy_Information:
Attribute_Value_Accuracy: 0.015m
Attribute_Value_Accuracy_Explanation:
Horizontal accuracy of 0.015m.
Attribute:
Attribute_Label: Longtude
Attribute_Definition:
Point coordinate longitude in a geographic projection, NAD83.
Attribute_Definition_Source:
Trimble Geomatics
Attribute_Domain_Values:
Unrepresentable_Domain:
Coordinates describing point location.
Attribute_Value_Accuracy_Information:
Attribute_Value_Accuracy: 0.015m
Attribute_Value_Accuracy_Explanation:
Horizontal accuracy of 0.015m.
Attribute:
Attribute_Label: ElipHght
Attribute_Definition:
Height of the ellipsoid, used to calculate elevation.
Attribute_Definition_Source:
Trimble Geomatics
Attribute_Domain_Values:
Unrepresentable_Domain:
Coordinates describing point location.
Attribute_Value_Accuracy_Information:
Attribute_Value_Accuracy: 0.015m
Attribute_Value_Accuracy_Explanation:
Vertical accuracy of 0.015m
Attribute:
Attribute_Label: RMS
Attribute_Definition:
RMS error within each point in meters.
Attribute_Definition_Source:
Trimble Geomatics
Attribute_Domain_Values:
Unrepresentable_Domain:
RMS error within each point in meters.
Attribute_Value_Accuracy_Information:
Attribute_Value_Accuracy: 0.001m
Attribute_Value_Accuracy_Explanation:
Calculates RMS down to 0.001m.
Attribute:
Attribute_Label: MinSats
Attribute_Definition:
Number of satellites used in determining point position.
Attribute_Definition_Source:
Trimble Geomatics
Attribute_Domain_Values:
Unrepresentable_Domain:
Number of satellites used in determining point position.
Attribute_Value_Accuracy_Information:
Attribute_Value_Accuracy: n/a
Attribute_Value_Accuracy_Explanation:
n/a
Attribute:
Attribute_Label: HorPrec
Attribute_Definition:
Precision of horizontal coordinates.
Attribute_Definition_Source:
Trimble Geomatics
Attribute_Domain_Values:
Unrepresentable_Domain:
Precision calculated for each point.
Attribute_Value_Accuracy_Information:
Attribute_Value_Accuracy: 0.001m
Attribute_Value_Accuracy_Explanation:
Precision is calculated to 0.001m
Attribute:
Attribute_Label: VertPrec
Attribute_Definition:
Precision of elevation measurement.
Attribute_Definition_Source:
Trimble Geomatics
Attribute_Domain_Values:
Unrepresentable_Domain:
Precision calculated for each point.
Attribute_Value_Accuracy_Information:
Attribute_Value_Accuracy: 0.001m
Attribute_Value_Accuracy_Explanation:
Precision is calculated to 0.001m
Attribute:
Attribute_Label: Notch
Attribute_Definition:
The notch number, starting from the northernmost notch (1) to the furthest south (6).
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Unrepresentable_Domain:
Notch number, starting from the northernmost notch (1) to the furthest south (6).
Attribute_Value_Accuracy_Information:
Attribute_Value_Accuracy: n/a
Attribute_Value_Accuracy_Explanation:
n/a
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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 - Fri 9am - 4pm
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 were 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: 0.088
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: http://nrdata.nps.gov/ASIS/ASISDATA/asis_notchsurveys.zip
Fees: None
Custom_Order_Process:
Download from http://science.nature.nps.gov/nrdata.
Technical_Prerequisites:
some GIS experience suggested
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Metadata_Reference_Information:
Metadata_Date: 20060209
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-Fri 9am-4pm
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://www.esri.com/metadata/esriprof80.html
Profile_Name: ESRI Metadata Profile
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