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Mischa<br>
<br>
I am working on those commands but In Linux side I have got the
training map to raster format with all visible.<br>
More issues I overcame (for students benefit) is:<br>
I imported a shape file made in Qgis with the RGB column and label
column. To get this to work I had to select 'command dialog' button
in 'import vector data' box and not just use' ivd' box gui.<br>
In the' import vector data' gui I ticked 'override dataset
projection (use locations projection)' and 'limit import to the
currect region' and made no other changes in the command dialog box
except to repeat input and output dataset names!<br>
Now v.to rast works but it doesn't allow out to specify the
attribute columns - looks greyed out, so you just type them as you
know them, it works!<br>
<br>
In windows grass I imported the same shp file, in the same way,
successfully. (this using grass not grass plugin in QGIS) In the
v.to.rast I can specify / select the attribute columns but when I
'run' it, I get the following:<br>
<br>
(Fri Aug 24 12:46:44
2012) <br>
v.to.rast input=qgis_lclu_trainingmap2@3420new
output=trainingmap_raster column=cat_ rgbcolumn=RGB
labelcolumn=label<br>
Loading data...<br>
Reading areas...<br>
Reading features...<br>
Writing raster map...<br>
Converted areas: 6 of 6<br>
Converted points/lines: 0 of 0<br>
v.to.rast complete.<br>
(Fri Aug 24 12:46:45 2012) Command finished (0 sec)<br>
<br>
Which one would think means everything is fine but now can see no
data - the entire dataset created is the same colour (white).<br>
<br>
Is the data most likely still there and just not displaying
correctly, or has some of the attribute info all been lost and it
all does have the same value?<br>
<br>
On 2012/08/16 18:48, Micha Silver wrote:
<blockquote cite="mid:502D2451.7060703@arava.co.il" type="cite">
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<div class="moz-cite-prefix">On 16/08/2012 18:11, Samantha
Goodchild-Brown wrote:<br>
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<blockquote cite="mid:502D0DBE.6020803@geograph.co.za" type="cite">
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Thank you<br>
<br>
In my frustration I have reverted to linux version which has
proved useful - seeing more messages is helpful.<br>
Mischa, your tip of g.region vect as well as finding reference
to v.in.region has proved helpful. This is likely to be my
critical mistake.<br>
In using the 'grass interface' I have again hit the RRR:GGG:BBB
field request (as I did with windows).<br>
It is very frustrating to find this now again when I can find no
other reference to it anywhere (not even in tuts cautioning to
make label column).<br>
Is it absolutely neccessary to go into this at this point (go
all the way back and begin again) or is there a way to 'bypass'
it?<br>
Or some quick shortcut?<br>
<br>
</blockquote>
<br>
Can you copy into an email the commands you are running, and the
results (errors) you are getting?<br>
If you're using the Linux terminal, then copy/paste the commands
and output, and post here.<br>
<br>
<blockquote cite="mid:502D0DBE.6020803@geograph.co.za" type="cite">
<br>
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Sam<br>
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On 2012/08/15 19:52, Paolo Cavallini wrote:
<blockquote
cite="mid:792a509f-e88b-4c74-901a-6f96bfb6797f@email.android.com"
type="cite">Or use OTB, also through sextante.<br>
--<br>
<a moz-do-not-send="true" href="http://faunalia.eu/pc">http://faunalia.eu/pc</a>
<br>
Sent from mobile, sorry for being short<br>
<br>
<div class="gmail_quote">richard burcher <a
moz-do-not-send="true" class="moz-txt-link-rfc2396E"
href="mailto:drownedfrog@gmail.com"><drownedfrog@gmail.com></a>
ha scritto:
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">
<pre style="white-space: pre-wrap; word-wrap:break-word; font-family: sans-serif">Another option is to create training polygons & use [1] SAGA for the
supervised classification (either standalone or through the Sextante
plugin). I've recently gone this way for a maximum likelihood
classification.
[1] <a moz-do-not-send="true" href="http://www.saga-gis.org/en/index.html">http://www.saga-gis.org/en/index.html</a>
Cheers,
Richard
--
View this message in context: <a moz-do-not-send="true" href="http://osgeo-org.1560.n6.nabble.com/problems-making-grass-training-map-via-qgis-tp4995324p4995387.html">http://osgeo-org.1560.n6.nabble.com/problems-making-grass-training-map-via-qgis-tp4995324p4995387.html</a>
Sent from the Quantum GIS - User mailing list archive at <a moz-do-not-send="true" href="http://Nabble.com">Nabble.com</a>.
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