[Proj] PROJ 4.5.0 beta (and Krovak!)

Jachym Cepicky jachym.cepicky at centrum.cz
Tue Oct 17 16:59:28 EDT 2006

On Tue, Oct 17, 2006 at 04:41:49PM -0400, Frank Warmerdam wrote:
> Gerald I. Evenden wrote:
> >I do not particularly care what the projection is called but I would 
> >appreciate some communications as to using the 'kocc' designation so I 
> >could at least change my releases of libproj4 to conform with external 
> >usage.
> Gerald,
> While proj produces results, though I don't know how correct they are:
> warmerda at gdal2200[1926]% ./proj +proj=krovak +ellps=bessel
> 10 45
> -1164802.15     -1546506.69

i can confirm this result, same for me and should be correct

> I don't really know any test points for Krovak or even what options
> are required in the two implementations.

try this one:
echo "12d48'25.15992  49d27'8.14571" | cs2cs +proj=latlong +datum=WGS84 \
+to +proj=krovak +ellps=bessel +no_defs \

-868208.53      -1095793.57 -46.96

http://grass.fsv.cvut.cz/wiki/index.php/S-JTSK#Praktick.C3.A1_uk.C3.A1zka )

> For now, I'll stick with the existing Krovak code for the 4.5.0 release,
> but if there are things we can do to make the two implementations
> compatible with the aim of a seamless transition to use of libproj4
> in the future, I'd be all for that!
> PS. I see PJ_krovak was checked in sometime in 2002.
> Best regards,
> --

hope, this helps a bit


Jachym Cepicky
e-mail: jachym.cepicky at centrum.cz
URL: http://les-ejk.cz
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Department of Geoinformation Technologies 
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613 00, Brno
Czech Republick
e-mail: xcepicky at node.mendelu.cz
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