Rolf Fankhauser
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Recent activity by Rolf Fankhauser Sort by recent activity-
Diversity is used in two other modules: PATTERN and TEXTURE In PATTERN documentation there is the following definition b) Diversity H = -sum(p*ln(p)) where sum = the sum over all classes in the ent...
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Hi Tammy, Thank you very much for your prompt answer! You told me that the 2.parameter is the file type mask. What about the other parameters no. 3, 4 (integer) and 5 (string)? Unfortunately it is ...
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Thanks Tammy! I think I see the way to proceed. I forgot to mention that there are other values in image1 and image2 to consider but I must first define how they should be combined.
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Hi James, Thanks for your answer. I have an aerial image with little noise I guess. In the meantime I made a PCA and used the first and second component for a ML classification. The results are bet...
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Yes, but I need for each land cover type a SQL statement: = 1 where landcover = "tree" = 2 where landcover = "acre" = 3 where landcover = "grass" etc. and you have to know which text field values a...
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Thanks a lot for your help, I have integrated my app in the Idrisi UI as described in the API user guide and it is working successfully. Best, Rolf
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Ok, I found a workaround. I expanded the images to 10cm and contracted them to 20cm. Regards, Rolf
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I solved it in R: I exported the table as csv, read it in R, created the index of the strings and outputted the idr_id and index as AVL file. So, I can generate the raster file with ASSIGN from the...
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I don't think that's possible with one SQL statement. Idr_id type_as_text1 tree2 acre3 grass4 tree5 grass6 grass7 acre8 tree Result should be: 1 12 23 34 15 36 37 28 1 where tree=1, acre=2, grass=3...