[Proj] Reprojection help for a newbie

Richard Chirgwin rchirgwin at ozemail.com.au
Sat Aug 11 00:40:20 EDT 2007


I'm using Grass-GIS, but with a reprojection I was told this list was 
the best place to go.

I have a lot of existing maps using a simple lat-long location in AGD84 
- that is, Australian ellopsoid, zone 0.

I'm now trying to import some maps that were put together using the 
Lambert Conformal Conical projection with the following project info:
Lamberts Conformal Conic, 3, 13, 7, 134, -27, -15, -39, 5000000, 5000000

I can't get the LCC-based map to reproject into the lat-long region and 
display correctly. I've tried cs2cs, but the LCC map is still 
out-of-shape compared to the ADG84 map. So clearly I'm doing something 
wrong. Can anyone tell me the correct use of cs2cs for reprojecting in 
and out of LCC?


More data if needed:
- For the LCC maps, the pointsfile contains lat-long columns, so I can 
get a file that looks like this:
(x, y, x1, y1)
4984067.30681393 5349948.72155986 133.82 -23.77

- However, for the lat-long files, I only have lat-long data (not the 
corresponding x-y values which would easily locate the lat-long info in 
the LCC space).
- As well as cs2cs, I have tried georectifying the points file towards 
the LCC projection, without success.

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