Am 26.08.12 12:24, schrieb Ansgar Esztermann: > Hi everyone, > > older German maps often use Bessel's ellipsoid and Potsdam datum. The > projection wizard appears not to have an entry for this, so I am > wondering if someone has a projection string handy for these maps? >
Should be EPSG:4746 PD/83: +proj=longlat +ellps=bessel +no_defs Most probably the maps are in Gauss-Krüger projection, which is EPSG:31466 onwards. To make projection even more precise, they have a +towgs84-parameter, which differs from place to place. Best results are reached with beta2007 correction: <http://crs.bkg.bund.de/crseu/crs/descrtrans/BeTA/de_dhdn2etrs_beta.php> HTH, André Joost ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Qlandkartegt-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/qlandkartegt-users
