New Zealand National Grid

Description

This was the standard projection for large-scale maps of New Zealand. Currently being replaced with New Zealand Transverse Mercator 2000.

Projection method

Modified cylindrical. A sixth-order conformal modification of the Mercator projection using the International spheroid.

Point of tangency

41° S, 173° E.

Linear graticules

None.

Properties

Shape

Conformal. Local shapes are correct.

Area

Distortion is less than 0.04 percent for New Zealand.

Direction

Minimal distortion within New Zealand.

Distance

Scale is within 0.02 percent of true scale for New Zealand.

Limitations

Not useful for areas outside New Zealand.

Uses and applications

Used for large-scale maps of New Zealand.

Parameters

Desktop

• False Easting
• False Northing
• Longitude of origin
• Latitude of origin

Workstation

• Projection-specific parameters are set by the software.