[mapguide-users] PROJ4 Category and Local Grid ....?

[Frank Warmerdam]

Jamo181 wrote:
> Hello I'm not too sure on where to look but I've come to a bit of a dead end
> again....
> 
> I've managed to add a new category and it shows up in MAPGUIDE MAESTRO!!!
> however I'm trying to now add a local grid which is based on a move rotate
> scale from 
> 
> 
> Data is stored in GDA94 / MGA Zone 56
> # GDA94 / MGA zone 56
> <28356> +proj=utm +zone=56 +south +ellps=GRS80 +towgs84=0,0,0,0,0,0,0
> +units=m +no_defs  <>
> 
> using these Params
> 
> Name, From X, From Y, To X, To Y, Rotation, Scale.
> MGA ref To FIG
> master,-1629723.610,-1675381.207,3800.192,3129.572,-57.975833,1.000400336
> 
> Not too sure on where to look for answers or what to do ....
> I've added this to the file specified in the category file but recieve an
> error ....?
> 
> I think I'm way way off....
> # FIG
> <FIG> +proj=utm +towgs84=5000,0,5000,0,0,0,0 +units=m +no_defs  <>

Jamo,

I don't exactly follow what you are trying to do, but please keep in
mind that +towgs84 shifts are applied in geocentric coordinates, not
planar coordinaes.  Also, it is not valid to have a UTM coordinate system
without the zone defined.

Best regards,
-- 
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I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
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and watch the world go round - Rush    | President OSGeo, http://osgeo.org