[Proj] old german topo

[John Smart]

Maciek

Here are the results of a couple of test runs of the proj program, using
Gauss-Krueger projection and Bessel ellipsoid, zone 5:

C:\proj\bin>proj -I +proj=tmerc +ellps=bessel +lat_0=0 +lon_0=15 +k=1
+x_0=5500000 +y_0=0
5489000 5662000
14d50'34.664"E  51d5'39.257"N

C:\proj\bin>proj +proj=tmerc +ellps=bessel +lat_0=0 +lon_0=15 +k=1
+x_0=5500000 +y_0=0
14d50' 51d6'
5488326.98      5662642.43

Looks like pretty reasonable correspondence to what's on your map.
Gauss-Krueger zone 5, central meridian 15 east, false easting 5500000, scale
factor = 1.

The longitudes are östlich von Greenwich (öL v Greenwich).

The Nadelabweichung note isn't relevant; it's just a note about magnetic
declination (difference between grid north and magnetic north, as of 1936!)

See if that works for you.
John


----- Original Message -----
From: "Maciek Sieczka" <werchowyna at pf.pl>
To: <proj at xserve.flids.com>
Sent: Monday, July 19, 2004 5:58 PM
Subject: [Proj] old german topo


> Hello Everyone!
>
> I've got few sheets of an old (before The Second World War) German topo
map
> which I want to register in it's coordinate system and reproject into a
> system being used know in Poland. Unfortunately I don't know the
projection
> definition of this German topo in detail. I'm writing the proj list hoping
> here I will find someone able to help me with this.
>
> Here go some details I managed to find out about these maps:
> - 1:25000
> - were called Messtischblättermap
> - the prime meridian intialy was Ferro, next Greenwich (since 1885)
> - Bessel ellipsoid
> - Gauss-Kruger projection (I don't speak German but that's what I
understood
> from the map's label (as in the proj.png)
>
> A small piece of the map, top-left corner, sheet called "4955 Ostritz", is
> attached - only 7 KB (mostly erased to be preserve space). 10 KB both
> pictures together, I hope that's not too much.
>
> I would very apreciate any information and suggestions where to look for
it.
>
> Maciek Sieczka
>


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