Differences between current version and previous revision of NewZealandMapGrid.
Other diffs: Previous Major Revision, Previous Author, or view the Annotated Edit History
| Newer page: | version 4 | Last edited on Tuesday, December 13, 2005 1:10:21 pm | by PhilMurray | |
| Older page: | version 3 | Last edited on Tuesday, December 13, 2005 12:55:04 pm | by PhilMurray | Revert |
@@ -1,5 +1,5 @@
The NewZealandMapGrid (NZMG) is a projection used for describing locations in NZ in terms of a Northing/Easting (much like [UTM]) using the [NZGD49] datum. It was designed specifically for NewZealand by Dr W. I. Reilly in 1973 to reduce error over the whole country and as such cannot be used for other parts of the world.
-Converting NZMG co-ordinates to a Latitude/Longitude co-ordinates (most common being [WGS84]) involves using complex polynomial equation. Because NZMG uses the old [NZGD49] datum, co-ordinates must be converted to [NZGD49] before applying the equation. Other common datums used that need conversion might be [NZGD2000] or [WGS84].
+Converting NZMG co-ordinates to a Latitude/Longitude co-ordinates (most common being [WGS84]) involves using complex polynomial equation. Because NZMG uses the old [NZGD49] datum, co-ordinates must be converted to [NZGD49] to take into account any distortions
before applying the equation. Other common datums used that need conversion might be [NZGD2000] or [WGS84].
The topographic and cadastral data sourced from [LINZ] is provided with NZMG coordinates.
