Can anyone point me to an example of how to 'make' proj4 including the New Zealand datum shift grids?
I understand I need to include the shift grids in the build, just not sure how to make it on windows.
The easy part is to download the sources and the NewZealand datums. Ucompres the proj4 distro and uncompress the NewZealand datums in the NAD directory within the proj4.
Then take a look to the INSTALL file. In summary:
I'm assuming you have installed in your system a GCC compiler and so on. If not here is a windows version http://www.mingw.org/