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please bear with this newbee as I am just getting into this extremely interesting field.

My Problem:

I have setup Hypertiles to use the GDALCompress batch file to mosaic my image - all good so far - but the coordinate systems they have available do not allow me to download an image to a planar coordinate system.

I have used the GDA94/Zone 55 coordinate system as this is the appropriate one for our neck of the woods but I now need to reproject my image to a planar system.

My Question:

How do I set up GDALwarp to do this? I am not familiar with the command line switches and syntax that is used. I also know that there is a scale factor of 0.996 applied to my image - does this have to be changed to 1.0?

Cheers Newbee (A little knowledge is a dangerous thing.)

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I may be missing a key point to your question but it looks like you can just do

gdalwarp -s_srs epsg:28355 -t_srs epsg:xxxxx ... 

where xxxx is whatever projection you want for the output. See for details of all the available options.

If all you require is reporjection then I'd use gdal_translate

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