These 2m contours were made from the DTM 10m grid which were a by product of the 0.125m resolution aerials done some 10 years ago.
They say the DTM can be used , as a rule of thumb, as fine as 2m +/- 1m.
Reference to LINZ datum One tree Point mean Sea level.
|Category||Contours & Terrain > Contours|
|Data type||Vector multilinestring|
|Services||Vector Query API|
|Revisions||1 - Browse all revisions|
|Current revision||Imported on Oct. 14, 2011 from Shapefile in NZGD49 / New Zealand Map Grid.|