| 28 Sep 2010 11:34 PM |
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Hi, I have landsat mage of my study area and have training site datas n want to carryout supervised classification of vegetation type iin that area. As my study area is very small, I delineate my ROI area and create mask of it. I have carried out unsupervised classification by applying mask on my original image and it was classified. HOwever, I am not able to carryout supervised classification with the same process. how can I carryout the suprevised classification? please tell me the procedure.
thanks,
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MariM
Veteran Member
Posts:2396  
| 29 Sep 2010 10:34 AM |
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Supervised classification is done from the Classification ->Supervised ->[classification method] menu. You select your image, and then your training data sets which can be in the form of ROIs/EVFs/Statistics/Spectral Libraries depending on the classification method used. It isn't clear from your description what part of this is not working for you.
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Deleted User
New Member
Posts: 
| 04 Oct 2010 02:23 PM |
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Hi,
sorry for any confusion. I want to carryout supervised classification (maximum likelihood) of the vegetation type in my study area which is very small. I have a landsat image and field datas. when i carried out classification, the whole image is also classified. How can I select my area of interest only, for classification?
I did unsupervised classification of it by defining roi and by building mask. I tried the same with the supervised one, but it doesnot work.
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MariM
Veteran Member
Posts:2396
| 05 Oct 2010 08:41 AM |
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After you select Classification ->Supervised ->, you are presented with a file selection dialog. In this dialog, you can choose to do a Spatial Subset and you can use an ROI or EVF to define this subset. Have you tried this?
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