Napier CC Orthophotos and DTM

Folder: DTM
Product:  DTM
File Format:  ASCII Space delimited files
File Naming:  NZTopo50 - 1:2000 tiles
Map Projection:  NZTM
Vertical Datum: HBLAD (MSL + 10m)
Primary source: Existing Napier CC LiDAR - accuracy as documented by NCC

Secondary source: Photography SN50772X
Date of Photography: 6 January 2009
Accuracy of Photogrammetric Corrections: 90% within xy +/-0.28 and z +/-0.32

Production Notes: The existing LiDAR data was checked using photogrammetry, and editted in areas of change where required for the production of orthophotos.  As part of the terrain capture process for orthophoto production, bridge outlines are captured - these have been supplied in the DTM directory in a Microstation DGN file called "Bridges_captured_for_ortho.dgn"

NZAM Ref 08.134