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

[mitch_TX]

Hi Hamish,

GRASS> cd $GISBASE/etc/gm/ 
GRASS> less gmmenu.tcl 
/composite  [Enter] 
up up up 

it's in "Raster -> Manage map colors -> Create RGB" 

there was a wish a while ago to build a menu tree for the commands, not 
sure if it went anywhere. Maybe something could be built into 
tools/module_synopsis.sh (add a line of text under each module descr with 
italicized a->b->c menu location?) 

[note to self: update the synopsis PDF for 6.4.0] 
 

..thanks, Moritz told me where to find it...my bad!


perhaps the computational region is different than the map's? 

config -> region -> change region -> set region to match this raster map 

??? 
 
 
I did that but I'll try it again (I'm not completely sure that I checked the region
while I was trying to do it via GUI -- I'm sure I did it via command...in fact good output).


I would say "mitigated" not "corrected". The imagery modules generally 
still don't like to look at maps in @othermapsets, and generally don't 
like @currentmapset tacked on map names either. But hopefully it breaks 
less now and exits with an understandable error message. The imagery libs 
need some TLC.
 
Are you saying that it's not a matter of version? Would I have the same problem
with the 6.4?
I'm sure it doesn't work when I copy the images in the user mapset...would that work
working in PERMANENT?
I did try to include the images in the group using the graphic way but deleting (in the box) @mapset...no luck.

But still, how about the Supervised? Wouldn't that work and tell me that THERE IS a sub-group
since I used it (the one created via command) for the Usupervised? (I tried to create another group -- via command --
and run the i.class but when I have to define the subgroup...nothing!..it doesn't find it.

Cheers,
mitch.


 



________________________________
Da: Hamish (via Nabble) <ml-user+64140-560766368 at n2.nabble.com>
A: mitch_TX <reflexeos at yahoo.it>
Inviato: Mercoledì 18 febbraio 2009, 20:25:52
Oggetto: Re: [GRASS-user] Long post - Remote Sensing - Classifications


mitch wrote: 
> How do I actually save a color composite image as a raster? 
.... 
> I couldn't find r.composite :working:..too much work. 

GRASS> cd $GISBASE/etc/gm/ 
GRASS> less gmmenu.tcl 
/composite  [Enter] 
up up up 

it's in "Raster -> Manage map colors -> Create RGB" 

there was a wish a while ago to build a menu tree for the commands, not 
sure if it went anywhere. Maybe something could be built into 
tools/module_synopsis.sh (add a line of text under each module descr with 
italicized a->b->c menu location?) 

[note to self: update the synopsis PDF for 6.4.0] 


> The other question is something that has been getting me 
> crazy for a couple of days: classifications. 
.... 
> (GUI: Imagery → Classify Image → Clustering input for 
> unsupervised classification) 
.... 
> output 
> Reading image ... 
> Iteration 1: % Convergence: 80.00 (0s elapsed, 0s left) 
> Iteration 2: % Convergence: 100.00 (0s elapsed, 0s left) 
> 
> (Pretty short output, innit?) 

perhaps the computational region is different than the map's? 

config -> region -> change region -> set region to match this raster map 

??? 


Moritz: 
> There were issues in 6.3 with the GUI appending @MAPSET to names 
> whereas the i.* commands couldn't deal with such names. This was 
> corrected since (but probably after 6.3 came out). 

I would say "mitigated" not "corrected". The imagery modules generally 
still don't like to look at maps in @othermapsets, and generally don't 
like @currentmapset tacked on map names either. But hopefully it breaks 
less now and exits with an understandable error message. The imagery libs 
need some TLC. 


Hamish 





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