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Last Post 29 Apr 2019 08:09 PM by  Hee Kyung Ryoo
Replace bad values Error
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anon



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21 Mar 2017 06:53 AM
    I have set of Landsat 7 images. I need to remove "black lines" from images and i use Remove bad Values tool. Tool works fine on most images but when i try to use it on some of them i get error like: "dem_bad_data_doit: An error has occured during processing Error: "TRIANGULATE: Points are co-linear, no solution" The result may be invalid. What's the problem? And how to fix it? Why some of images are processed fine and some not? They are from same source (https://earthexplorer.usgs.gov/)

    MariM



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    21 Mar 2017 01:49 PM
    Although the images are from the same source, the gaps are different for each image. The Replace Bad Values tool uses IDL's TRIANGULATE procedure: https://www.harrisgeospatial.com/docs... It mentions that it will fail if the points are colinear and there is a TOLERANCE keyword that can be used to adjust how colinear points are treated. You might try using this procedure in IDL.

    Deleted User



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    22 Mar 2017 03:57 AM
    I'm quite new to ENVI, is there a simple solution to this? Doing it through IDLE seems difficult to me, because i've never worked with this.

    Deleted User



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    12 Apr 2017 04:31 PM
    Hello, I have ENVI 5.4, but I can not open Sentinel-2 images, and I have the same error: Files does not appear to be valid Sentinel-2 file.: Directory\MTD_MSIL1C.xml. Best Regards

    MariM



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    12 Apr 2017 05:18 PM
    There is a patch for reading newer Sentinel-2 files available for ENVI 5.4. Please contact your local distributor to request this patch: http://www.harrisgeospatial.com/Conta...

    Hee Kyung Ryoo



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    29 Apr 2019 08:09 PM
    I have the same problem with what Adam mentioned.
    I'm trying to replace bad values with triangulating method from 'landsat gapfill' extention.
    Some data worked, but few had problems and error poped up saying:
    "dem_bad_data_doit: An error has occured during processing
    Error: "TRIANGULATE: Points are co-linear, no solution." The result may be invalid."
    How can I fix it?
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