Re: [FreeGeoCZ] Fwd: [GRASS-dev] [bug #5396] (grass) hermannskogel datum parameters for Slovakia

[ivan mincik <ivan.mincik AT gmail.com>]

ano ja som prave pre tuto velku odchylku uplne prestal pouzivat grass
pre transformacie medzi sur. syst.
nie je mozne vytvorit pre SR novu presnejsiu definiciu towgs? na zaklade
coho bola vytvorena terajsia?

ivan

On Tue, 2006-12-19 at 09:19 +0100, Peter Paudits wrote:
> Nastavenie towgs pre SK v grasse je chybne. Ako pise dolu v bugliste,
> chyba je 120 - 130 m oproti programu Samuel pre AV. Tento bug tam
> pretrvava od verzie 5.0.3 a bolo by dobre ho odstranit a nechat jedno
> spolocne nastavenie pre CZ aj SK.
> 
> Preto Slovaci pouzivajte nastavenie towgs pre Czech, chyba oproti
> Samuelovi je 1 - 3 m. PROJ_INFO by malo vyzerat takto:
> 
> name: Krovak
> datum: hermannskogel
> towgs84: 570.8,85.7,462.8,4.998,1.587,5.261,3.56
> proj: krovak
> ellps: bessel
> a: 6377397.1550000003
> es: 0.0066743722
> f: 299.1528128000
> [ppaudits@ppaudits PERMANENT]$
> 
> P.
> 
> On 18/12/06, Martin Landa <landa.martin AT gmail.com> wrote:
> > Zdravim, preposilam GRASS bug ticket, aktualni stav v GRASS-CVS:
> >
> > hermannskogel "towgs84=570.8,85.7,462.8,4.998,1.587,5.261,3.56" "Czech
> > Republic" " "
> > hermannskogel "towgs84=559.0,68.7,451.5,7.920,4.073,4.251,5.71" 
> > "Slovakia" " "
> >
> > Porovnam-li s parametry z GRASSwikiCZ -- nejsem si jisty, jake hodnoty
> > parametru pro SR pouzit...
> >
> > Pro SR:
> >
> > name: Krovak
> > datumparams: towgs84=558.7,68.8,452.2,8.025,4.105,4.295,5.74
> > proj: krovak
> > ellps: bessel
> >
> > ?
> >
> > Martin
> >
> > ---------- Forwarded message ----------
> > From: Request Tracker <grass-bugs AT intevation.de>
> > Date: 18.12.2006 13:40
> > Subject: [GRASS-dev] [bug #5396] (grass) hermannskogel datum
> > parameters for Slovakia
> > To: grass-dev AT grass.itc.it
> >
> >
> > this bug's URL: http://intevation.de/rt/webrt?serial_num=5396
> > -------------------------------------------------------------------------
> >
> > Subject: hermannskogel  datum parameters for Slovakia
> >
> > Platform: GNU/Linux/x86
> > grass obtained from: Trento Italy site
> > grass binary for platform: Compiled from Sources
> >
> > Hermannskogel datum parameters for Slovakia (Krovak projection) are
> > wrong. The estimated error for these parameters is about 120-130 m.
> > Unless proper parameters are available I suggest to use parameters for
> > Czech republic which give acceptable results with 1-3 meter error.
> > The item for Slovakia should be removed from menu and item for Czech
> > republic (1.) could be extended to include also Slovakia.
> > The evaluation was done using local cartographic tools (Samuel for
> > ArcView and Dattra).
> >
> >
> > -------------------------------------------- Managed by Request Tracker
> >
> > _______________________________________________
> > grass-dev mailing list
> > grass-dev AT grass.itc.it
> > http://grass.itc.it/mailman/listinfo/grass-dev
> >
> >
> > --
> > Martin Landa <landa.martin AT gmail.com> * http://gama.fsv.cvut.cz/~landa *
> >
> >
> > _______________________________________________
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> > FreeGeoCZ AT fsv.cvut.cz
> > http://mailman.fsv.cvut.cz/mailman/listinfo/freegeocz
> >
> >
> >
> 
> 
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