Digital Elevation Model (DEM) for the Bering Land Bridge

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Metadata:
Identification_Information:
Citation:
Citation_Information:
Originator: William Manley, Univ. of Colorado, INSTAAR
Publication_Date: 20021220
Title: Digital Elevation Model (DEM) for the Bering Land Bridge
Edition: Version 1
Geospatial_Data_Presentation_Form: raster digital data
Publication_Information:
Publication_Place: Boulder, CO, USA
Publisher: University of Colorado, INSTAAR
Other_Citation_Details:
Manley, W.F., 2002, Digital Elevation Model (DEM) for the Bering Land Bridge: INSTAAR, University of Colorado, v1, instaar.colorado.edu/QGISL/bering_land_bridge.
Online_Linkage: <http://instaar.colorado.edu/QGISL/bering_land_bridge>
Description:
Abstract:
2 km Digital Elevation Model (DEM) for the Bering Land Bridge, Bering Sea, and Chukchi Sea, created from the ETOPO2 Dataset. This DEM was used to create "Postglacial Flooding of the Bering Land Bridge: A Geospatial Animation".
Purpose: Display and analysis of terrain and bathymetry.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20021220
Currentness_Reference: Publication Date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Unknown
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: 159.59
East_Bounding_Coordinate: -145.05
North_Bounding_Coordinate: 70.13
South_Bounding_Coordinate: 47.64
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: DEM
Theme_Keyword: DTM
Theme_Keyword: elevation
Theme_Keyword: relief
Theme_Keyword: bathymetry
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Alaska
Place_Keyword: Russia
Place_Keyword: Siberia
Place_Keyword: Bering Land Bridge
Place_Keyword: Bering Sea
Place_Keyword: Chukchi Sea
Place_Keyword: Bering Strait
Access_Constraints: None
Use_Constraints:
It is not recommended that the data be used at a scale larger than 1 to 7,000,000. Dataset credit required. Use at your own risk.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: William F. Manley
Contact_Organization:
University of Colorado, Insitute of Arctic and Alpine Research (INSTAAR)
Contact_Position: Research Scientist
Contact_Address:
Address_Type: mailing address
Address: University of Colorado
Address: Institute of Arctic and Alpine Research (INSTAAR)
Address: Campus Box 450
City: Boulder
State_or_Province: Colorado
Postal_Code: 80309-0450
Country: USA
Contact_Voice_Telephone: 303/735-1300
Contact_Facsimile_Telephone: 303/492-6388
Contact_Electronic_Mail_Address: William.Manley@colorado.edu
Browse_Graphic:
Browse_Graphic_File_Name: blb1_dem.gif
Browse_Graphic_File_Description: Blue to red colored thumbnail image of the DEM.
Browse_Graphic_File_Type: GIF
Native_Data_Set_Environment: Windows XP, ArcGIS 8.2 (ArcInfo)
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: See Horizontal Accuracy.
Logical_Consistency_Report: Not applicable for raster data.
Completeness_Report: None.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Consistent with accuracy of the source data, the ETOPO2 global dataset (<http://www.ngdc.noaa.gov/mgg/image/2minrelief.html>). Linear artifacts and relatively minor geopositioning errors are apparent. Horizontal and vertical accuracies were not tested or quantified.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: See Horizontal Accuracy.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: NOAA National Geophysical Data Center (NGDC)
Publication_Date: 20011001
Title: ETOPO2
Publication_Information:
Publication_Place: Boulder, CO
Publisher:
NOAA National Geophysical Data Center (NGDC). See <http://www.ngdc.noaa.gov/ngdc.html>.
Type_of_Source_Media: digital database file
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20011001
Source_Currentness_Reference: Publication Date
Source_Citation_Abbreviation: None
Source_Contribution: The ETOPO2 data comprised the only data source for this DEM.
Process_Step:
Process_Description:
Standard GIS techniques were used. Datum was defined as NAD27 (the ETOPO2 dataset does not have a defined datum). The area of interest was clipped separately for areas E and W of 180 degrees. The separate areas were then projected from 2 minute spacing (with slight oversampling) using bilinear interpolation to UTM zone 2 with 2 km spacing, clipped, mosaic'ed, and clipped to final dimensions. An anomalous basin in Norton Sound (apparent by comparison with a navigational chart) was corrected. In this small area, grid cell values less than -23 m were converted to nodata, and replaced (merged) with depths from a topogrid interpolation using surrounding bathymetry. Higher resolution bathymetric data are needed for scientific analysis of this region.
Process_Date: 20021121
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 1510
Column_Count: 1495
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 2
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 2000
Ordinate_Resolution: 2000
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1927
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378206.4
Denominator_of_Flattening_Ratio: 294.98
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview: Elevation.
Entity_and_Attribute_Detail_Citation: See Source Information.
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: William F. Manley
Contact_Organization:
University of Colorado, Insitute of Arctic and Alpine Research (INSTAAR)
Contact_Position: Research Scientist
Contact_Address:
Address_Type: mailing address
Address: University of Colorado
Address: Institute of Arctic and Alpine Research
Address: Campus Box 450
City: Boulder
State_or_Province: Colorado
Postal_Code: 80309-0450
Country: USA
Contact_Voice_Telephone: 303/735-1300
Contact_Facsimile_Telephone: 303/492-6388
Contact_Electronic_Mail_Address: William.Manley@colorado.edu
Distribution_Liability:
Users must assume responsibility to determine the usability of this data for their purposes. The University of Colorado makes no express or implied warranties - including warranties of merchantability or fitness - with respect to the character, function, or capabilities of the electronic services or products or their appropriateness for any user's purposes. In no event will the University of Colorado be liable for any incidental, indirect, special, consequential or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products, any failure thereof or otherwise, and in no event will the University of Colorado's liability to the requestor or anyone else exceed the fee paid for the electronic service or product.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: GRIDFLOAT (.flt)
File_Decompression_Technique:
Use Alladin Expander or similar utility to decompress the .tar.gz file, a .gziped .tar file that contains the associated .flt, .hdr., and .prj files, as well as the .gif thumbnail image, .txt and .html metadata files.
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <http://instaar.colorado.edu/QGISL/bering_land_bridge>
Fees: Free. See Use Constraints and Distribution Liability.
Metadata_Reference_Information:
Metadata_Date: 20021216
Metadata_Review_Date: 20021216
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: William F. Manley
Contact_Organization:
University of Colorado, Insitute of Arctic and Alpine Research (INSTAAR)
Contact_Position: Research Scientist
Contact_Address:
Address_Type: mailing address
Address: University of Colorado
Address: Institute of Arctic and Alpine Research
Address: Campus Box 450
City: Boulder
State_or_Province: Colorado
Postal_Code: 80309-0450
Country: USA
Contact_Voice_Telephone: 303/735-1300
Contact_Facsimile_Telephone: 303/492-6388
Contact_Electronic_Mail_Address: William.Manley@colorado.edu
Metadata_Standard_Name: FGDC Content Standard For Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Generated by mp version 2.7.33 on Mon Dec 16 14:59:59 2002