Identification_Information: Citation: Citation_Information: Originator: Government of Canada, Natural Resources Canada, Earth Sciences Sector, Geomatics Canada, Centre for Topographic Information Publication_Date: Unknown Title: Canadian Digital Elevation Data, Level 1 Geospatial_Data_Presentation_Form: Digital, Map > Digital Elevation Model, Raster Digital Data Publication_Information: Publication_Place: Sherbrooke, Quebec, Canada Publisher: Government of Canada, Natural Resources Canada, Earth Sciences Sector, Centre for Topographic Information Other_Citation_Details: English, GeoBase Online_Linkage: \data\dem\dem_nquep1.tif Description: Abstract: The Canadian Digital Elevation Data, Level 1 (CDED1) consists of an ordered array of ground elevations at regularly spaced intervals. The CDED1 is based on National Topographic Data Base (NTDB) digital files at scales of 1:50 000 and 1:250 000 or various scaled positional data acquired from the provinces, according to the National Topographic System (NTS). The coverage for every file corresponds to half an NTS map, which means that there are western and eastern parts to the CDED1 for each NTS map. The grid spacing is based on geographic coordinates at a maximum and minimum resolution of 0.75 and 3 arc seconds for the 1:50 000, and 3 and 12 arc seconds for the 1:250 000 respectively, depending on latitude. A CDED1 file consists of elevation data recorded in metres relative to Mean Sea Level (MSL) based on the North American Datum 1983 (NAD83) horizontal reference datum. The Centre for Topographic Information (CTI) jointly produces the CDED1 with federal and provincial government agencies and the private sector, using terrain-modelling software. CDED1 files are delivered in ASCII format for either DOS or UNIX operating systems and are available via the File Transfer Protocol (FTP). The data should be compatible with all translators designed for the United States Geological Survey (USGS) Digital Terrain Elevation Data (DTED). The files are compressed using the PKZIP compression software. Purpose: CDED1 has assumed a major role in digital mapping. The data is used in Geographic Information Systems (GIS) for land-management applications. CDED1 plays the same role as contours and relief shading on conventional paper maps but is more powerful analytically. In addition to providing estimated values of elevation points, CDED1 can be used to determine orientation and the slope of each point when used in GIS applications. CDED1 can also be used for terrain modelling, for calculating the influence of the terrain on line-of-sight, for radar imaging, for simulating flooding and similar applications. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1945-01-01 Ending_Date: PRESENT Status: Progress: In work Maintenance_and_Update_Frequency: Continually Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -79.802564 East_Bounding_Coordinate: -70.712318 North_Bounding_Coordinate: 63.222119 South_Bounding_Coordinate: 59.581952 Keywords: Theme: Theme_Keyword: Digital Elevation Model Theme_Keyword: DEM Theme_Keyword: DTM Theme_Keyword: MNE Theme_Keyword: MNT Place: Place_Keyword: Cape Smith Place_Keyword: Northern Quebec Place_Keyword: Ungava Peninsula Place_Keyword: 035C,035D,035E,035F,035G,035H,035I,035J,035K,035L,025E Access_Constraints: Data are subject to the GeoBase Unrestricted Use Licence Agreement (http://www.geobase.ca - Data/Licence) Use_Constraints: Data are subject to the GeoBase Unrestricted Use Licence Agreement (http://www.geobase.ca - Data/Licence) Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Customer Support Group Contact_Organization: Government of Canada, Natural Resources Canada, Earth Sciences Sector, Geomatics Canada, Centre for Topographic Information Contact_Address: Address_Type: mailing and physical address Address: 2144, King Street West, Suite 010 City: Sherbrooke State_or_Province: Quebec Postal_Code: J1J 2E8 Country: Canada Contact_Voice_Telephone: +01-819-564-5600 / 1-800-661-2368 (Canada and USA) Contact_Facsimile_Telephone: +01-819-564-5698 Contact_Electronic_Mail_Address: ntdb@nrcan.gc.ca Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535 Data_Quality_Information: Lineage: Process_Step: Process_Description: Source_Used_Citation_Abbreviation: Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Grid Cell Row_Count: 5786 Column_Count: 6661 Vertical_Count: 1 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: row and column Coordinate_Representation: Abscissa_Resolution: 68.730500 Ordinate_Resolution: 68.730500 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 Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: GeoBase Technical Support Contact_Organization: Government of Canada, Natural Resources Canada, Earth Sciences Sector, Geomatics Canada, Centre for Topographic Information Contact_Address: Address_Type: mailing and physical address Address: 2144, King Street West, Suite 010 City: Sherbrooke State_or_Province: Quebec Postal_Code: J1J 2E8 Country: Canada Contact_Voice_Telephone: +01-819-564-5600 / 1-800-661-2368 (Canada and USA) Contact_Facsimile_Telephone: +01-819-564-5698 Contact_Electronic_Mail_Address: supportGeobase@NRCan.gc.ca Resource_Description: Downloadable Data Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Transfer_Size: 153.076 Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Customer Support Group Contact_Organization: Government of Canada, Natural Resources Canada, Earth Sciences Sector, Geomatics Canada, Centre for Topographic Information Contact_Address: Address_Type: mailing and physical address Address: 2144, King Street West, Suite 010 City: Sherbrooke State_or_Province: Quebec Postal_Code: J1J 2E8 Country: Canada Contact_Voice_Telephone: +01-819-564-5600 / 1-800-661-2368 (Canada and USA) Contact_Facsimile_Telephone: +01-819-564-5698 Contact_Electronic_Mail_Address: ntdb@nrcan.gc.ca Distribution_Liability: Data are subject to the GeoBase Unrestricted Use Licence Agreement (http://www.geobase.ca - in the Data section). Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Transfer_Size: 153.073 Fees: Gratuit-Free Metadata_Reference_Information: Metadata_Date: 2003- 10- 28 Metadata_Review_Date: 2005- 06- 17 Metadata_Future_Review_Date: 2005- 12- 14 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Government of Canada, Natural Resources Canada, Earth Sciences Sector, Geomatics Canada, Centre for Topographic Information Contact_Person: Customer Support group Contact_Address: Address_Type: mailing and physical address Address: 2144, King Street West, Suite 010 City: Sherbrooke State_or_Province: Quebec Postal_Code: J1J 2E8 Country: Canada Contact_Voice_Telephone: +01-819-564-5600 / 1-800-661-2368 (Canada and USA) Contact_Facsimile_Telephone: +01-819-564-5698 Contact_Electronic_Mail_Address: ntdb@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