Hello,
I ran the cell driver and forgot to set the region back to default after that.
When trying to display a vector map d.vect just runs without any error
message, but nothing is displayed. I finally realized the problem when trying
to display a raster map and receiving error messages. Shouldn't there be the
same kind of error message for vector and site maps ?
Moritz
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On Mon, Mar 05, 2001 at 10:51:55AM +0100, mlennert@club.worldonline.be wrote:
Hello,
I ran the cell driver and forgot to set the region back to default after that.
When trying to display a vector map d.vect just runs without any error
message, but nothing is displayed. I finally realized the problem when trying
to display a raster map and receiving error messages. Shouldn't there be the
same kind of error message for vector and site maps ?
Mostly there's the idea that an entire GRASS location would be in one
projection, so routines often don't check that the projection in the
region setting matches the projection defined for the spatial layer. In
the case of sites, it's not really possible with the current format.
There's a possible heuristic for lat/lon vs. other projections based on
the way lat/lon is stored. But other than that... Seems like it would
be nicer if we didn't have to change the region settings to convert
D_cell to some regular graphics file format. Perhaps the PNGdriver does
this, I haven't tested it...
--
Eric G. Miller <egm2@jps.net>
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On Mon, Mar 05, 2001 at 09:15:44PM -0800, Eric G. Miller wrote:
On Mon, Mar 05, 2001 at 10:51:55AM +0100, mlennert@club.worldonline.be wrote:
> Hello,
>
> I ran the cell driver and forgot to set the region back to default after that.
> When trying to display a vector map d.vect just runs without any error
> message, but nothing is displayed. I finally realized the problem when trying
> to display a raster map and receiving error messages. Shouldn't there be the
> same kind of error message for vector and site maps ?
Mostly there's the idea that an entire GRASS location would be in one
projection, so routines often don't check that the projection in the
region setting matches the projection defined for the spatial layer. In
the case of sites, it's not really possible with the current format.
There's a possible heuristic for lat/lon vs. other projections based on
the way lat/lon is stored. But other than that... Seems like it would
be nicer if we didn't have to change the region settings to convert
D_cell to some regular graphics file format. Perhaps the PNGdriver does
this, I haven't tested it...
From the man page
http://www.geog.uni-hannover.de/grass/gdp/html_grass5/html/PNGdriver.html
it seems that it directly exports the file.
As I don't get the required "gd lib" compiled, I can't test it...
Markus
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On Tue, Mar 06, 2001 at 10:20:13AM +0000, Markus Neteler wrote:
[snip]
> the way lat/lon is stored. But other than that... Seems like it would
> be nicer if we didn't have to change the region settings to convert
> D_cell to some regular graphics file format. Perhaps the PNGdriver does
> this, I haven't tested it...
>From the man page
http://www.geog.uni-hannover.de/grass/gdp/html_grass5/html/PNGdriver.html
it seems that it directly exports the file.
As I don't get the required "gd lib" compiled, I can't test it...
I tested it last night. It works fine with sockets and it does create a
regular png file. I loathe adding another dependency for configure and
GRASS in general with this gd library.
--
Eric G. Miller <egm2@jps.net>
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[cc to Per Henrik Johansen]
On Tue, Mar 06, 2001 at 08:19:06AM -0800, Eric G. Miller wrote:
On Tue, Mar 06, 2001 at 10:20:13AM +0000, Markus Neteler wrote:
[snip]
> > the way lat/lon is stored. But other than that... Seems like it would
> > be nicer if we didn't have to change the region settings to convert
> > D_cell to some regular graphics file format. Perhaps the PNGdriver does
> > this, I haven't tested it...
>
> >From the man page
> Bereich Geographie – Naturwissenschaftliche Fakultät – Leibniz Universität Hannover
> it seems that it directly exports the file.
>
> As I don't get the required "gd lib" compiled, I can't test it...
I tested it last night. It works fine with sockets and it does create a
regular png file. I loathe adding another dependency for configure and
GRASS in general with this gd library.
Is there a chance to replace the GD stuff with something else?
But I have no idea about GD programming...
Markus
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