[PROJ] EPSG:4326 --> EPSG:5677

[Roger Oberholtzer]

I am trying to project some EPSG:4326 locations (from a GPS) to
EPSG:5677 (DHDN Germany Zone 3). I have sample data from the German road
authorities (BASt). They feel that the locations provided by proj (9.6.0)
are consistently 1.5 meters or so away from that they expect. They were
also expecting a change in altitude as the ellipsoid was different. I have
implemented this with something like this:

myCRS = proj_create_crs_to_crs( 0,  "EPSG:4326",  "EPSG:5677",  0);

And then calling proj_trans(myCRS, PJ_FWD, PJ_COORD);

My question is if I need to do more than this as EPSG:5677 is ellipsoid
Bessel 1841.

-- 
Roger Oberholtzer
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