[GRASS-dev] v.info Projection info

[Maciej Sieczka]

Huidae Cho wrote:
> Hi,
> 
> I found that Vect_open_old_head() does not set Map.proj:

<snip>

> For this reason, v.info always prints out "Projection: x,y (zone ...)"
> (Map.proj == 0 == PROJECTION_XY) regardless of its actual projection.
> It seems like to me there is no projection info in vector files.  If
> individual vector files cannot have a different projection from its
> location, why doesn't v.info use G_database_projection_name() like
> r.info does?

Hi,

Since this issue is rised, I'd like throw my 0,01 PLN in. Why, in the
first place, does r.info or v.info even try to print the projection
info? I don't think they should. It is pointless - all the maps within
one Location have the same projection anyway. For querying the
Location's projection info there is g.proj -p. And also the g.region
-p, but same as in case of *.info modules, I believe it shouldn't do
that - g.region should be concerned with the region extent and
resolution only. It would be enough if it just distunguished between
lat/long, projected and xy, and not go into ellipsoids/datums/zones
details and stuff - there is g.proj for that.

What do you think? Removing this code alltogether from *.info would let
us get rid of bogus, missleading r.info output in the kind of
"Projection: Latitude-Longitude (zone 0)" as well. Propably not a plan
for GRASS 6, but how about 7?

Maciek