Hi,
I used g.setproj to adjust the ellipsoid info for my laea projection. The new ellipsoid info was: sphere:6370997, but g.region -p shows
ellipsoid: **unknown (default: WGS84)**
even though when I run g.setproj a second time the sphere info comes up as the current settings. Is everything okay, or should I re-define the LOCATION from scratch?
Thanks.
Martin
On Wed, 10 Mar 2004, Martin du Saire wrote:
Hi,
I used g.setproj to adjust the ellipsoid info for my laea projection. The
new ellipsoid info was: sphere:6370997, but g.region -p showsellipsoid: **unknown (default: WGS84)**
Don't worry about what g.region says. It should not really be reporting
the ellipsoid as it isn't relevant to the region settings.
Are you using the latest 5.3? I think I fixed some bugs
(e.g. it said the ellipsoid was unknown if there was no ellps line in the
PROJ_INFO when it is quite acceptable for it to be defined by the
underlying a, es etc. parameters)
even though when I run g.setproj a second time the sphere info comes up as
the current settings. Is everything okay, or should I re-define the
LOCATION from scratch?
If you post the output of g.projinfo here we can see if it is valid or not.
What modules are you using where the ellipsoid being a sphere might be
important? (converting to lat/long or reprojecting?) I don't think sphere
was handled very well in most 5.0.x versions---you may be better using 5.3
if necessary but I'm not 100% sure that everything that accepts a sphere
does so.
The main reason it was important was for people working with Mars but I
don't think I have seen any feedback from them about the bugfixes.