[GRASS-user] Error while adding north-arrow in GRASS6.4

GRASS GRASS user
1

Greetings all

I have a location with a region with the following characteristics:
projection: 3 (Latitude-Longitude)
zone: 0
datum: wgs84
ellipsoid: wgs84
north: 83:00:10N
south: 34N
west: 11:00:10W
east: 41:00:00.000002E
nsres: 0:00:10
ewres: 0:00:10
rows: 17641
cols: 18721
cells: 330257161

When I try to add north arrow/Scale to the map I get a ERROR-Window with the following:
error in command execution: d.barscale.exe at=0,5 --q
Error: b.barscale does not work with a latitude-longitude location

And the following error is printed in the command output:
*Traceback (most recent call last):
  File "c:\OSGeo4W\apps\grass\grass-6.4.0svn\etc\wxpython\gu
i_modules\gdialogs.py", line 416, in OnOK

# close dialog
  File "C:\GRASS6\etc\wxpython\gui_modules\mapdisp.py", line
785, in UpdateMap

for img in self.GetOverlay():
  File "C:\GRASS6\etc\wxpython\gui_modules\mapdisp.py", line
647, in GetOverlay

if os.path.isfile(overlay.mapfile) and
os.path.getsize(overlay.mapfile):
  File "C:\GRASS6\Python25\lib\ntpath.py", line 283, in
isfile

st = os.stat(path)
TypeError
:
coercing to Unicode: need string or buffer, NoneType found
*

Is this a bug or is this something that would be expected? If it's a bug I will add to the trac

THanks

Best regards,
Antonio Rocha

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2

António wrote:

I have a location with a region with the following
characteristics:

projection: 3 (Latitude-Longitude)

...

When I try to add north arrow/Scale to the map I get a
ERROR-Window with the following:

...

Error: b.barscale does not work with a latitude-longitude
location

A scale-bar simply does not & can not work with lat/lon.
Distance scale is not the same on the x and y axes.
Use d.grid instead.

See the help page.

(there was an idea to change the units to degrees/min/sec for
lat/lon scalebars a while back but it hasn't been implemented
yet)

And the following error is printed in the command output:
*Traceback (most recent call last):
File
"c:\OSGeo4W\apps\grass\grass-6.4.0svn\etc\wxpython\gu
i_modules\gdialogs.py", line 416, in OnOK

# close dialog
File "C:\GRASS6\etc\wxpython\gui_modules\mapdisp.py",
line
785, in UpdateMap

for img in self.GetOverlay():
File "C:\GRASS6\etc\wxpython\gui_modules\mapdisp.py",
line
647, in GetOverlay

if os.path.isfile(overlay.mapfile) and
os.path.getsize(overlay.mapfile):
File "C:\GRASS6\Python25\lib\ntpath.py", line 283, in
isfile

st = os.stat(path)
TypeError
:
coercing to Unicode: need string or buffer, NoneType found
*

Is this a bug or is this something that would be expected?
If it's a bug I will add to the trac

all that extra noise isn't nice, it should give the error and
quietly go away.

Hamish