[GRASS-user] Long post - Remote Sensing - Classifications

[mitch_TX]

Hi,

let me start saying that I do like the wxpython GUI...it's very nice and
usable. It really is!...so, thank you guys for all the work you've been
doing for the community!

As far as the classification:

-Unsupervised-

Command: it works either @user or @permanent.
GUI: I got stuck at the i.cluster window. How do I set the sampling interval
values? I'm not allow to use any kind of character but numbers...how do I
differentiate row and column value?

http://n2.nabble.com/file/n2369388/sampling.png sampling.png 

If I leave 1 value I get this error:
ERROR: option <sample> must be provided in multiples of 2 You provided 1
items:       50


I've notice that i.group window has been changed: shouldn't “Name of imagery
sub-group” and “Name of the raster map(s) to include in group” be under the
Required tab rather than Optional? (don't get me wrong, I don't want to
criticize in a “bad” way, it's because maybe you receive a lot of feedbacks
about other parts and this module is not so used....I haven't seen so many
Remote Sensing questions lately...that's why).

-Supervised- I couldn't figure out how to make it work.
Command:

i.group group=l_sup sub=l_sup
in=lsat7_2002_10,lsat7_2002_20,lsat7_2002_30,lsat7_2002_40,lsat7_2002_50,lsat7_2002_70


Adding raster map <lsat7_2002_10 at PERMANENT> to group
Adding raster map <lsat7_2002_20 at PERMANENT> to group
Adding raster map <lsat7_2002_30 at PERMANENT> to group
Adding raster map <lsat7_2002_40 at PERMANENT> to group
Adding raster map <lsat7_2002_50 at PERMANENT> to group
Adding raster map <lsat7_2002_70 at PERMANENT> to group
Adding raster map <lsat7_2002_10 at PERMANENT> to subgroup
Adding raster map <lsat7_2002_20 at PERMANENT> to subgroup
Adding raster map <lsat7_2002_30 at PERMANENT> to subgroup
Adding raster map <lsat7_2002_40 at PERMANENT> to subgroup
Adding raster map <lsat7_2002_50 at PERMANENT> to subgroup
Adding raster map <lsat7_2002_70 at PERMANENT> to subgroup
i.group complete.

g.region -p rast=lsat7_2002_40

projection: 99 (Lambert Conformal Conic)
zone:       0
datum:      nad83
ellipsoid:  a=6378137 es=0.006694380022900787
north:      228513
south:      214975.5
west:       629992.5
east:       645012
nsres:      28.5
ewres:      28.5
rows:       475
cols:       527
cells:      250325

Command finished (0 sec)



i.class group=l_sup sub=l_sup map=lsat7_2002_40 outsig=outsig

Command finished (0 sec)


...but nothing more than that. Shouldn't I be prompted to a display where I
can draw my region of interest? (I don't know, maybe I'm expecting something
that it's not supposed to be).


GUI:
Imagery → Classify image → Interactive input for supervised classification
(requires Xterm)

a blank Monitor display and a new shell appear and nothing else.

Are all of the GUI issues due to this
http://grass.osgeo.org/wiki/WxPython-based_GUI_for_GRASS#Imagery_tools
(Status: development not started yet)

Cheers,
mitch
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