On 6/14/12 7:52 AM, Yasin Selçuk Berber wrote:
I want to set a projection area larger than data's geographical coverage.
But data must still be georeferenced correctly inside map region
and coastlines in projection area should still be visible outside data
area.
right now, the data is always stretched inside whole projection area.
trying to mimic with characters:
--right now--
ulcorner
_______________________
| p r o j. a r e a |
| |
| w h o l e |
| d a t a |
| i s |
| s t r e t c h e d |
| |
-----------------------| lrcorner
--what i try to do--
ulcorner
_______________________
| |
|__________ this |
| | is |
| this |projection |
| is | area |
| data | |
| | |
-----------------------| lrcorner
Code below certainly does not work and stretch data to full projection
region:
-------------------------
*code skipped*
m = Basemap(projection='merc',llcrnrlat=37,urcrnrlat=42,\
llcrnrlon=24,urcrnrlon=34,resolution='i')
m.imshow(data, cmap=plt.cm.jet, interpolation='nearest')
plt.show()
*code skipped*
---------------------------
i fiddled with imshow's extent and clip_box keywords but since could
not get it work. and googling for a serious amount of time didnt help
either.
Some posts on web mentioned bbox or set_autoscale_on related things
but i cant seem to get it. Any ideas ?
thanks.
--
Yasin Selçuk Berber
"Bismillah, her hayr?n bas,?d?r."
Yasin: If you use pcolor or contourf, you can specify the x,y (map
projection) coordinates of the data grid, and the data will be plotted
on a subset of the map projection region. imshow (which doesn't take
x,y coordinates) just fills the whole plotting region with an image. If
you want to use imshow, perhaps you could define an inset map (with no
coastlines drawn) inside your larger map, and plot the image on the
inset map.
-Jeff
--
Jeffrey S. Whitaker Phone : (303)497-6313
Meteorologist FAX : (303)497-6449
NOAA/OAR/PSD R/PSD1 Email : jeffrey.s.whita...@noaa.gov
325 Broadway Office : Skaggs Research Cntr 1D-113
Boulder, CO, USA 80303-3328 Web : http://tinyurl.com/5telg
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