ULLR Adventure Map Technical Information
Our maps use the North American Datum NAD83, a geodetic reference system ellipsoid (GRS80).
Our maps are created using Universal Transverse Mercator (UTM) conformal projection. The extents of our maps lie within Zone 10N.
- Central Meridian: -123°
- False Easting: 500,000m
- False Northing: 0m
- Latitude of Origin: 0°
- Scale Factor: 0.9996
ULLR Adventure Maps use a measured grid with the following coordinate format: 5549000mN spaced at 1km intervals. Our map grid also contains a graticule grid with the following coordinate format: 50° 05′ spaced at 0.02° intervals.
ULLR Adventure maps use a variety of non-traditional scales that best suit the desired display area:
- Whistler Mountain Ski Map: 1:5,475
- Blackcomb Mountain Ski Map: 1:4,493
- Spearhead Traverse and Whistler Backcountry 1:10,597
ULLR Adventure Maps regularly updates the magnetic declination on our maps. We source our information from the National Oceanic and Atmospheric Administration’s magnetic field calculators. You can see the current magnetic declination for Whistler here.
All ULLR Adventure Maps use either a 10m or 20m contour interval depending on the map footprint. This is done because our maps are purposefully built at a relatively small scale and a small contour interval helps interpret terrain with a higher amount of accuracy.
ULLR Adventure Maps use a cell size of 1,000 x 1,000 m.