[Proj] cs2cs, new datum definition, towgs84, no_def

[Frank Warmerdam]

On 8/15/05, Michal Seidl <michal_seidl at yahoo.com> wrote:
> Hi,
> I realy tried to find this information in manuals but with no success.
> 1. how to define new datum to be shown by $ cs2cs -ld

Michal,

They would be added in the list data structure in 
src/pj_datums.c. 

> 2. is somewhere documentation about file syntax i can call by +init.
> Especialy information about towgs83 (the rotation units?, rotation
> orientation clockwise?,scale units?), no_defs etc.

Some generic parameters are described at:

  http://www.remotesensing.org/proj/gen_parms.html#towgs84

Others are described in the various .pdf files on the PROJ.4
web site. 

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