pinghanling

Transformation from WGS84 to NZTM2000

Discussion created by pinghanling on Jan 20, 2013
Latest reply on Jan 22, 2013 by pinghanling
Hi,

I'm working in ArcGIS 10.0.

I have a JPG image georeferenced in WGS84.

When I try to reproject this to NZTM2000 using the Project Raster tool, I can select the source and destiniation coordinate systems, but there is no transformation that is appropriate (only the reverse one exists in ArcGIS) and, although transformation is 'optional', an error message appears that it's needed when I try to reporoject without specifying a transformation.

I have two problems:

1. ArcGIS doesn't have a built-in transformation between WGS84 and NZTM2000. It only has the reverse - NZTM2000 to WGS84.

2. I don't know how to enter parameters for a custom transformation. The only detailed transformation information on NZTM2000 I could find, is on this page:
http://www.linz.govt.nz/geodetic/conversion-coordinates/projection-conversions/transverse-mercator-preliminary-computations
But I don't know how to udse this information in parameters for one of ArcGIS's transformation methods.

I would be grateful for any help.

Regards
Hanlie

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