[Proj] Converting to SRS:4326

[Bradley Mclain]

I am having some slight problems with what you are saying, firstly If I use

proj -I +init=epsg:28355

I get a long list of different projections but no new numbers or anything.

Also secondly I am not exactly sure what input values I have to put it. Is
it my current extent or is it the longitude latitude values which match
this?

What I want to get out is the correct extent for my map in EPSG:4326.

Its current extent using EPSG:28355 is 301964.225304 6172911.602455
439497.461276 6230476.242273

With latitude and longitude 146.123 -34.2918 146.152 -34.2685


On 7/18/07, Frank Warmerdam <warmerdam at pobox.com> wrote:
>
> Bradley Mclain wrote:
> > What I am trying to do is get the extent of my data which is on
> > SRS:28355 and convert it too SRS:4326 so my map will display correctly.
> >
> > I used the command
> >
> > proj +proj=longlat +ellps=WGS84 +datum=WGS84 <geogdata.txt >results.txt
> >
> > but it returned
> >
> > +proj=latlong unsuitable for use with proj program
>
> Bradley,
>
> With the proj command transformation is always implicitly between a
> projected coordinate system and the corresponding geographic coordinate
> system.
>
> So you could do:
>
>    proj -I +init=epsg:28355
>
> to translate from EPSG:28355 coordinates to GDA_1994 coordinates
> (essentially
> WGS84 as I understand it).  (Note the -I, to invert the normal lat/long to
> projected transformation)
>
> If you want to more explicitly control things, use cs2cs.
>
> eg.
> cs2cs +init=epsg:28355 +to +proj=latlong +datum=WGS84
>
> Best regards,
> --
>
> ---------------------------------------+--------------------------------------
> I set the clouds in motion - turn up   | Frank Warmerdam,
> warmerdam at pobox.com
> light and sound - activate the windows | http://pobox.com/~warmerdam
> and watch the world go round - Rush    | President OSGeo, http://osgeo.org
>
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