brw_dem, a 60 m Digital Elevation Model (DEM) for the western Brooks Range, northwestern Alaska

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Metadata:
Identification_Information:
Citation:
Citation_Information:
Originator: William Manley, Univ. of Colorado, INSTAAR
Publication_Date: 20011008
Title:
brw_dem, a 60 m Digital Elevation Model (DEM) for the western Brooks Range, northwestern Alaska
Edition: Version 1
Geospatial_Data_Presentation_Form: raster digital data
Publication_Information:
Publication_Place: Boulder, CO, USA
Publisher: University of Colorado, INSTAAR
Description:
Abstract:
Digital elevation model (DEM), 60 m grid for the western Brooks Range, created from the USGS National Elevation Dataset (NED).
Purpose: Display and analysis of terrain.
Supplemental_Information:
Raster grid available as a floating point file (GRIDFLOAT format) with associated .hdr and .prj files. For related research information, see: <http://instaar.colorado.edu/QGISL>
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20011008
Currentness_Reference: Publication Date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Unknown
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -162.387
East_Bounding_Coordinate: -157.829
North_Bounding_Coordinate: 68.9996
South_Bounding_Coordinate: 67.749
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: DEM
Theme_Keyword: DTM
Theme_Keyword: elevation
Theme_Keyword: relief
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Alaska
Place_Keyword: Brooks Range
Place_Keyword: North Slope
Place_Keyword: Noatak
Place_Keyword: Baird
Place_Keyword: Delong
Access_Constraints: None
Use_Constraints:
It is not recommended that the data be used at a scale larger than 1 to 63,360. 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: brw_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 NT4 to 2000, ArcInfo 8.0.1, ArcView 3.2, ArcGis 8.1, MFWorks 2.6.3
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 NED seamless DEM, based in turn on the 15min DEM's for Alaska. See standards for the NED dataset (<http://edcnts12.cr.usgs.gov/ned>) and USGS DEM's generally (<http://rockyweb.cr.usgs.gov/nmpstds/demstds.html>).
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: See Horizontal Accuracy.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey (USGS), EROS Data Center
Publication_Date: 20000124
Title: National Elevation Dataset
Publication_Information:
Publication_Place: Sioux Falls, SD
Publisher:
U.S. Geological Survey (USGS), EROS Data Center. See <http://edcwww.cr.usgs.gov> and <http://edcnts12.cr.usgs.gov/ned>.
Type_of_Source_Media: digital database file
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20000124
Source_Currentness_Reference:
Publication Date (see years of aerial photography for individual 15 min quadrangles for date of ground condition).
Source_Citation_Abbreviation: None
Source_Contribution: The NED DEM data comprised the only data source for this DEM.
Process_Step:
Process_Description:
The first step in producing this DEM was importing the NED data (in BIL or ArcInfo GRID format) into ArcInfo 8.0.1. Map projection, datum, and grid cell spacing for the original NED DEM are geographic, NAD27, 2 arcsec. This grid was reprojected to UTM coordinates, NAD27, 60 m using bilinear sampling, and subsequently truncated to an integer grid. This preliminary integer grid was brought into the MFWorks raster GIS program, and clipped to eliminate extraneous areas. This grid was finally brought back into ArcInfo as a raster GRID file. For ease of downloading, the grid was exported to binary format (.flt) using the GRIDFLOAT command (creating the associated .hdr header file and .prj projection file). The MFWorks program was also used to create a GEOTIF file depicting a combination of colored elevation and shaded relief.
Process_Date: 20000229
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 2125
Column_Count: 3053
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 4
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 60
Ordinate_Resolution: 60
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 .tgz 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. Download the combination color shaded-relief geotif file (brw_combo.tif.gz) separately.
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <http://instaar.colorado.edu/QGISL/downloads>
Fees: Free. See Use Constraints and Distribution Liability.
Metadata_Reference_Information:
Metadata_Date: 20011008
Metadata_Review_Date: 20011008
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 2.7.17 on Mon Oct 08 09:17:57 2001