Digital elevation model of the Mackenzie River valley, Northwest Territories (Section C)

Metadata also available as

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Natural Resources Canada - Geological Survey of Canada
Publication_Date: March, 2007
Title:
Digital elevation model of the Mackenzie River valley, Northwest Territories (Section C)
Edition: 1
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:
Series_Name: GSC Open File
Issue_Identification: 5337
Publication_Information:
Publication_Place: Ottawa, Canada
Publisher: Geological Survey of Canada
Online_Linkage: \\w5-ott-h000926\d drive\OpenFile5337\data\mcdem30c
Description:
Abstract:
The data represent a digital elevation model (DEM) of the Mackenzie River valley, Northwest Territories, which spans from the Alberta border to the Beaufort Sea (10° of latitude). Contour lines from 1:50 000 digital map sheets (source: <http://www.cits.rncan.gc.ca>) for the Mackenzie River valley were edge matched. A line file representing the coastline was also extracted from the waterbodies element of the NTDB and was merged with the contour lines and assigned an elevation of 0 metres. These contour lines were used to generate the DEM. To make the resulting DEM file sizes manageable, the study area is divided in 5 sections. Because of memory limitations, to generate the DEM, each section was subdivided in 5 or 6 parcels. A 30 km buffer around the parcel's boundary was assigned while generating the DEMs with the ANUDEM algorithm in ArcINFO workstation. All contour lines inside the 30 km buffer were used and a minimum Z value of 0 metres was enforced. The resulting DEMs were trimmed by 9 km, then the parcels were mosaicked using a mean. A final step cropped the resulting section to its appropriate neatline (with a 150 m buffer on adjacent sections). Hillshade grids were generated for each section with values of 315º for azimuth, 45º for altitude and 1 for vertical exaggeration (z). The hillshades were used to visually check the quality of the DEM; local filtering was applied where needed. The final DEM sections are named from north to south: mcdem30a, mcdem30b, mcdem30c, mcdem30d, and mcdem30e. Their respective hillshades are named with the "hs" prefix: mcdem30a_hs, mcdem30b_hs, mcdem30c_hs, mcdem30d_hs, mcdem30e_hs.
Purpose:
DEMs can be used as layers in Geographic Information Systems for earth science analysis or display purposes. These DEMs are used as a layer in ground thermal modelling of the Mackenzie River Valley, N.W.T.
Supplemental_Information:
When two sheets that were being edge matched had different contour intervals (for example 25 feet and 50 feet) the larger interval was used, but the contours in between were left on the map. Any small semi circle contours with no match in the adjoining sheet were deleted. Areas that were difficult to edge match in the corridor were found in 107D06. We believe this is due to older paper maps produced at different times leading to poor consistency between mapsheets with the errors being propagated to the digitized map versions.

Commands used in ArcInfo workstation to generate the DEMs: Arc: topogrid <dem_filename> 30 TopoGrid: datatype contour TopoGrid: contour <con_filename> elev_m TopoGrid: boundary <filename_buff30> TopoGrid: enforce off TopoGrid: tol 2.5 1 0 TopoGrid: outputs sk_<dem_filename> dr_<dem_filename> dia_<dem_filename> TopoGrid: xyzlimits # # # # 0 # TopoGrid: end

Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: unknown
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -139.998581
East_Bounding_Coordinate: -125.271765
North_Bounding_Coordinate: 70.910198
South_Bounding_Coordinate: 64.856260
Keywords:
Theme:
Theme_Keyword_Thesaurus:
REQUIRED: Reference to a formally registered thesaurus or a similar authoritative source of theme keywords.
Theme_Keyword: Elevation
Theme_Keyword: DEM
Theme_Keyword: Digital elevation model
Place:
Place_Keyword: Mackenzie River
Place_Keyword: Mackenzie valley
Place_Keyword: Northwest Territories
Access_Constraints:
©Her Majesty the Queen in Right of Canada 2007 Available from Geological Survey of Canada 601 Booth Street Ottawa, Ontario K1A 0E8
Use_Constraints: See "Licence.txt"
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: C. Duchesne
Contact_Organization: Natural Resources Canada
Contact_Address:
Address_Type: mailing address
Address: 194-601 Booth St.
City: Ottawa
State_or_Province: ON
Postal_Code: K1A 0E8
Country: Canada
Contact_Voice_Telephone: 613-995-7628
Contact_Electronic_Mail_Address: cduchesn@nrcan.gc.ca
Data_Set_Credit:
©Her Majesty the Queen in Right of Canada 2007 Available from Geological Survey of Canada 601 Booth Street Ottawa, Ontario K1A 0E8
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780

Data_Quality_Information:
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: See documentation in publication DVD
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: See documentation in publication DVD
Lineage:
Source_Information:
Type_of_Source_Media: DVD-Rom
Process_Step:
Process_Description: DEM Generated
Process_Step:
Process_Description: Metadata imported.
Source_Used_Citation_Abbreviation: c:\temp\xml221.tmp

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 11591
Column_Count: 14067
Vertical_Count: 1

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Lambert Conformal Conic
Lambert_Conformal_Conic:
Standard_Parallel: 60.000000
Standard_Parallel: 66.000000
Longitude_of_Central_Meridian: -115.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 0.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 30.000000
Ordinate_Resolution: 30.000000
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: D_GRS_1980
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_Distance_Units: meters

Distribution_Information:
Resource_Description: Downloadable Data
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size: 624.149

Metadata_Reference_Information:
Metadata_Date: 20070319
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: C. Duchesne
Contact_Organization: Natural Resources Canada
Contact_Address:
Address_Type: mailing and physical address
Address: 194-601 Booth St.
City: Ottawa
State_or_Province: ON
Postal_Code: K1A 0E8
Country: Canada
Contact_Voice_Telephone: 613-995-7628
Contact_Electronic_Mail_Address: cduchesn@nrcan.gc.ca
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile

Generated by mp version 2.8.6 on Mon Mar 19 14:35:38 2007