DIGITAL ELEVATION MODELS

• Description
  • source: http://www.landdata.gov.bc.ca
  • TRIM Gridded Digital Elevation Model - 25m Interval (Version: 1.1)
  • from Digital Terrain Resource Inventory Mapping (TRIM) topographic database at 1:20 000 for the Province of BC.
  • ArcInfo raster grid format
  • map sheets NTS92j and 82n
  • resolution: 25m x 25m pixels
  • Derived from breaklines, areas and mass points.
  • Completeness Date: 30-MAR-98
  • Elevation Accuracy Description: 90% of DEM points are accurate to within 5 metres vertical and + / - 10 metres horizontal LMAS
  • Positional Accuracy Specification Document: Gridded DEM Specification
• Spatial
  • Coordinate System: Cartesian
  • Horizontal Coordinate Units: Metres
  • Vertical Coordinate Units: Metres
  • Horizontal Datum: NAD83
  • Horizontal Datum Adjustment: None required
  • Vertical Datum: CVD28
  • Map Projection: UTM
    • zone 10N for 92j
    • zone 11N for 82n
  • Data Registration: Geodetic Control
• Usage
  • Original Intended Use: Surface Modelling
  • Intended Scale Of Use: 1:20 000

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