Tue, Mar 1 2005
17:18:09
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Request created by guest
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Subject: g.region -p always displays the zone information
Platform: GNU/Linux/i386
grass obtained from: Mirror of Trento site
grass binary for platform: Compiled from Sources
GRASS Version: grass-6.0.cvs_src_snapshot_2005_02_12
Why is zone always displayed in g.region -p output?
| Projection: Transverse Mercator (zone 0)
My location is not UTM first of all so this info does not fit. Secondly the UTM
zone 0 is somewhere on the west coast of North America while my location is for
Poland, Europe, so this might be missleading.
Maciek |
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Tue, Mar 1 2005
21:14:32
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Mail sent by mneteler
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Please post
g.proj -p
to better understand your problem.
Markus |
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Wed, Mar 2 2005
13:20:54
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Comments added by guest
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Cc: neteler@itc.it ; grass5@grass.itc.it
SORRY! I meant r.info, not g.region!!! g.region is just fine!
Below is the appropriate report:
Please note that although the location and the raster are in Stereographic
projection there is "zone (0)" comment in the r.info's report.
The location is not UTM first of all so any "zone" info does not fit. Secondly
the UTM zone 0 is somewhere on the west coast of North America while the
location here is Poland, Europe, so this might be eventually missleading.
GRASS 6.0.cvs:~ > r.info u65_p190r024_7p20010524_z33_nn80
+----------------------------------------------------------------------------+
| Layer: u65_p190r024_7p20010524_z33_n Date: Fri Feb 25 21:01:05 2005
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| Mapset: PERMANENT Login of Creator: pingwin
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| Location: caves_65
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| DataBase: /home/grassdata
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| Title: ( u65_p190r024_7p20010524_z33_nn80 )
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|----------------------------------------------------------------------------|
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| Type of Map: raster Number of Categories: 255
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| Data Type: CELL
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| Rows: 16265
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| Columns: 18056
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| Total Cells: 293680840
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| Projection: Stereographic (zone 0)
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| N: 5746474.98553376 S: 5514698.73553376 Res: 14.25
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| E: 3883196.56575737 W: 3625898.56575737 Res: 14.25
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| Range of data: min = 0 max = 255
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| Data Source:
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| Data Description:
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| generated by r.in.gdal
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+----------------------------------------------------------------------------+
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Mon, Jun 6 2005
13:14:36
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Subject changed to r.info displays the "(zone 0)" message in any location by msieczka
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Mon, Jun 6 2005
13:15:50
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Subject changed to r.info displays the '(zone 0)' message in any location by msieczka
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Mon, Jun 6 2005
13:20:17
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Comments added by msieczka
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I have just corrected the name of the bug. To remain you what is on please see:
r.info N51E015
<snip>
Projection: Latitude-Longitude (zone 0)
<snip>
I think the '(zone0)' part is redundant and eventually misleading, isn't it?
This affects any location.
Cheers
Maciek |
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Thu, Jul 21 2005
14:01:17
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Mail sent by mneteler
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IMHO it's difficult to define a list of projections where
ZONE applies. That's why it's always displayed.
EPSG knows thousands of projections. How to find all those
having a zone info?
Markus |
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Thu, Jul 21 2005
14:01:30
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Area changed to wish6 by mneteler
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Fri, Sep 2 2005
18:42:20
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User changed to werchowyna@epf.pl by msieczka
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Fri, Sep 2 2005
18:53:42
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Mail sent by msieczka
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mneteler wrote:
> IMHO it's difficult to define a list of projections where
> ZONE applies. That's why it's always displayed.
> EPSG knows thousands of projections. How to find all those
> having a zone info?
OK, I understand. But, it has just jumped on me - why does r.info display
projection info anyway? There is g.proj (and g.region partially) for that.
E.g. v.info doesn't mention projection, let's keep things uniform.
I really think that such information like:
Projection: Stereographic (zone 0)
has no any value, and is only a confusion, especially for a newbie.
Maciek |
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Wed, Jul 26 2006
14:27:17
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User changed to tutey@o2.pl by msieczka
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Wed, May 30 2007
11:51:07
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Comments added by hbowman
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I have fixed this in 6.3cvs so it only prints zone if proj==UTM.
I expect the original idea was to display the contents of the raster map's
Cell_head:
struct Cell_head
{
..
int proj; /* Projection (see #defines above) */
int zone; /* Projection zone */
..
}
Currently it just prints out the location's projection info, which is pretty
useless except for providing "units" for the bounding coordinates.
Suggested remedy: change r.info to output what's in the rast map's header
info. (for better or worse: see v.info -- there it outputs the map's info.
Unfortunately that isn't correctly set very often)
keeping bug open for that, but renaming it.
Hamish
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Wed, May 30 2007
11:51:52
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Subject changed to r.info displays proj info for the location, not what's in the map's Cell_head by hbowman
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