Re: [DebianGIS] Fw: Re: [Proj] NAD27 and WGS84 woes

[Hamish <hamish_b@yahoo.com>]

> Hamish wrote:
> > fwd from the PROJ4 ML re. a "proj-data" package; the datum distortion
> > grid data files can be found here:
> >   ftp://ftp.remotesensing.org/proj/proj-datumgrid-1.4.tar.gz
....

Francesco P. Lovergine  wrote:
> But for technical relevance of providing the datum shits at compile time,
> someone should be able to provide licesing information about that beast.

sure,

> There are a couple of blobs there too, whose origin and format are not
> clear. I doubt a proj-data could be releasable as is in main.
> Pre-depending on that is out of discussion for plain proj4. I would
> avoid a battle against ftpmasters for such a thing.

I don't think it is too hard to collect that info for the 15 data files:

* 12 are (AFAIK) US gov't sourced, and so without copyright.
* I don't know about the Canadian Grid file, presumably Frank (.ca) does.
* Permission for the French data is described by Richard Didier, chef du
  pôle technique Géoportail pour l'IGN, in this thread:
  http://www.nabble.com/proj-datumgrid-1.4-issued-td18581042.html
* and I hold the clearance "paperwork" for the NZ grid file from LINZ.


Hamish:
> > so the proj package would need to build-depends on proj-data; I've no
> > idea of the consequences of the grid files being missing at
> > run time if only the proj package is installed on the user's
> > system.
> > 
> > Also, I don't know if it is relevant, but ISTR that GRASS processes
> > the ascii files to binary in an endian sensitive way.


regards,
Hamish