Northern Horizontal Network
Part of the Canadian spatial reference system is an horizontal 2-D network of geodetic monuments spaced 20 to a 100 km apart in the Yukon, Northwest Territories and Nunavut. Station coordinates were determined using a variety of survey methods (non-GPS) and accuracy varies. Most have horizontal coordinates labelled simply “NAD83” signifying they are NAD83(Original) and compatible with NAD83(CSRS) but at the meter level or worse.
2-D Northern network map
The 2-D Northern network can be accessed via the CSRS Online Database. Station locations can be downloaded from Geobase (as GML or shapefile) under "FEDERAL 2D DENSIFICATION NETWORK, NORTH OF CANADA LEVEL 1"