Re: [GRASS-user] i.gensig - multiple signatures into a single file for i.maxlik
Hi Paul, Please keep discussions on the list. Le Fri, 8 Jun 2018 10:33:56 +0100, Paul Shapley a écrit : > Hi Moritz, > > Thank you for your help. I am trying to get 5 signatures but the layer > manager is out of action whilst i create the signatures in the 'Class > Manager'. What do you mean by "out of action" ? And why do you need the layer manager while using the class manager (we are speaking about g.gui.iclass [1], here, or ?) ? You can directly create different classes in one run of this tool. You can save your training areas as a one single vector map containing all areas of all classes and/or create the signature file (containing all classes). Check out the video tutorial linked at [2]. > I need to move the map window between each signature. If i > could do them individually i can combine the signatures into one file > later before using 'i.maxlik'. If you have different classes in different vector maps, you can combine them using v.patch, rasterize the result using v.to.rast (or possibly v.to.rast on each and then r.patch) and use then use the resulting raster map as input for i.gensig. It will automatically create the signature file combining all classes. Moritz [1] https://grass.osgeo.org/grass74/manuals/wxGUI.iclass.html [2] http://grasswiki.osgeo.org/wiki/WxGUI_Supervised_Classification_Tool ___ grass-user mailing list grass-user@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] i.gensig - multiple signatures into a single file for i.maxlik
Am 7. Juni 2018 16:53:51 MESZ schrieb Paul Shapley : >Hi Users, > > >What is the correct format for placing multiple signatures into a >single ascii file. > >Is a '#' required between each signature along with a blank line? > >or can i start the new signature with line 2 e.g. #grass > >and is there a '#' after the last line to end the file. > I'm not in front of a computer right now and cannot check the code, so I don't have an answer, but why are you trying to craft this file by hand ? i.gensig is the tool dedicated to cresting these files for you. Moritz > >1 # >2 #water >3 4186 >4 67.9508 48.7346 37.8915 15.3129 13.8473 12.0855 >5 1.74334 >6 0.439504 2.07267 >7 0.662523 1.63501 4.21189 >8 0.530339 2.40757 5.52857 22.433 >9 0.561184 2.30762 5.18846 20.5364 20.4926 >10 0.393218 1.2184 2.63628 9.61528 9.36025 5.8531411 > >11 #grass > >12 2132 > >13 etc > >*OR* > >1 # >2 #water >3 4186 >4 67.9508 48.7346 37.8915 15.3129 13.8473 12.0855 >5 1.74334 >6 0.439504 2.07267 >7 0.662523 1.63501 4.21189 >8 0.530339 2.40757 5.52857 22.433 >9 0.561184 2.30762 5.18846 20.5364 20.4926 >10 0.393218 1.2184 2.63628 9.61528 9.36025 5.8531411 > >11 # > >12 #grass > >13 etc > >Many thanks, ___ grass-user mailing list grass-user@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] i.gensig
Markus Neteler schrieb: On Fri, Oct 24, 2008 at 10:57 AM, Manuel Seeger [EMAIL PROTECTED] wrote: Hello all, I using grass 6.3.0 on a 64 machine (ubuntu 7.10) When applying i.gensig on a set of 20 rasters for defining 6 different groups I get the following output: Finding training classes ... 6 classes. Calculating class means ... Calculating class covariance matrices... Signature [1] not invertible. Signature [2] not invertible. Signature [3] not invertible. Signature [4] not invertible. Signature [5] not invertible. Signature [6] not invertible. Writing signature file [DRP_Zemmer] ... Done. The problem is: the signature file is empty. it may be related to the info Signature [1] not invertible. But I don't know what GRASS wants to tell me. I am not sure what happens - apparently imagery/i.gensig/can_invert.c fails. Could you try to reduce the number of input maps for a test? Markus Its long time passed, excuse me I tried reducing the number of rastermaps I get the same message. When I transform the rasters first with PCA I get no error! What is the problem? Best regards Manuel -- ___ Dr. Manuel Seeger Wiss. Assistent Scientific Assistant Physische GeographieDpt. of Physical Geography FB VI - Geographie/GeowissenschaftenGeography/Geosciences Universität Trier University of Trier D - 54286 Trier Tel.: +49-651-201 4557 Fax:+49-651-201 3976 Web:http://www.uni-trier.de/index.php?id=18521 ___ EGU General Assembly 2009 SSS17. Experimental Methods in Soil Erosion Studies Convener: Seeger, M. Co-Convener:Kuhn, N.; Quinton, J. http://meetingorganizer.copernicus.org/EGU2009/session/930 ___ ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] i.gensig
On Fri, Oct 24, 2008 at 10:57 AM, Manuel Seeger [EMAIL PROTECTED] wrote: Hello all, I using grass 6.3.0 on a 64 machine (ubuntu 7.10) When applying i.gensig on a set of 20 rasters for defining 6 different groups I get the following output: Finding training classes ... 6 classes. Calculating class means ... Calculating class covariance matrices... Signature [1] not invertible. Signature [2] not invertible. Signature [3] not invertible. Signature [4] not invertible. Signature [5] not invertible. Signature [6] not invertible. Writing signature file [DRP_Zemmer] ... Done. The problem is: the signature file is empty. it may be related to the info Signature [1] not invertible. But I don't know what GRASS wants to tell me. I am not sure what happens - apparently imagery/i.gensig/can_invert.c fails. Could you try to reduce the number of input maps for a test? Markus ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
