Greetings<br>I'm freely following this tutorial (<a href="http://grass.osgeo.org/wiki/Image_classification">http://grass.osgeo.org/wiki/Image_classification</a>) and I'm getting a odd error.<br>I'm sending this command:<br>
i.gensigset trainingmap=a@landsat group=gr06@landsat subgroup=sub signaturefile=sig maxsig=5<br><br>and I get this:<br>Finding training classes...<br>5 classes found<br>Reading raster maps...<br>Clustering class 1 (1753 pixels)...<br>
Number of subclasses is 5<br>Clustering class 2 (2810 pixels)...<br>Number of subclasses is 5<br>Clustering class 3 (2772 pixels)...<br>Number of subclasses is 5<br>Clustering class 4 (2177 pixels)...<br>Number of subclasses is 5<br>
Clustering class 5 (6060 pixels)...<br>Number of subclasses is 5<br>unable to create signature file sig for subgroup sub of group gr06@landsat<br>ERROR: Unable to create signature file <sig><br><br>I think it might have somethibg to do with i.group because everytime I open i.group the followiong is printed to the Command output:<br>
Invalid element 'gr03@landsat@landsat'<br>Invalid element 'gr04@landsat@landsat'<br>Invalid element 'gr05@landsat@landsat'<br>Invalid element 'gr06@landsat@landsat'<br>All these are groups that I have made<br>
<br>If I do group -l group=gr06@landsat I get:<br><br>group <gr06> references the following raster maps<br>-------------<br><lsat7_2000_10@landsat> <lsat7_2000_20@landsat> <br>
<lsat7_2000_30@landsat> <lsat7_2000_40@landsat> <br><lsat7_2000_50@landsat> <br>-------------<br>i.group complete.<br><br>What might be wrong?<br>Thanks<br>Luisa<br>