[OSRS-PROJ] Horrors of --- Krovak projection

Frank Warmerdam warmerdam at pobox.com
Fri Feb 14 13:39:50 EST 2003

Gerald I. Evenden wrote:
> I follow Lobochevski's rule: "Plagiarize!  Let nothing evade your eyes!
> But please, let us call it research." (from old Tom Lehar song)
> (please pardon possible misspellings). ;-)
> I pulled down a copy of  proj-4.4.5.tar but did not find anything
> about Krovak.  I presume this code is still on your "desk."


The code is in CVS, and publically available but not yet in a
published release.  You install a CVS client and grab the latest
source if you like ... I would be happy to provide update access to
the CVS repository.  But I will send the code in a separate message
to save you the trouble of setting up CVS.

I made some effort in incorporating the code to replace hardcoded
constants with parameters, but I did not succeed in extracting the
azimuth or pseudo-standard parallel.

If you produce a better normalized form I would be happy to incorporate

> I would be glad to look at anything.  At the moment I nearly have
> the rehacked code functioning but still in need of "refinements."
> I was also working on a TeX/pdf of a writeup for Krovak that contains
> the math in readable form---so far, the Czech site looks like the
> only reliable source---at least it matches the code.
> I would do a map but I don't have any vector data suitable for
> medium scale European area showing current politics.
> Because of getting the "long lost sources" back onto my current
> machine due to Mike Schmidt's needs, I fell into a spasm of
> doing some updates to PROJ.4.

Cool.  Well, I reiterate my offer to provide you with update access
to the version hosted at remotesensing.org.  It seems like a pity to
have two divergent versions of PROJ.4 with different abilities.

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    | Geospatial Programmer for Rent

PROJ.4 Discussion List
See http://www.remotesensing.org/proj for subscription, unsubscription
and other information.

More information about the Proj mailing list