CONTACT

Link to Sergei’s ResearchGate profile (link).

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6 Replies to “CONTACT”

  1. Dear Sergei,

    I am using LEFA for the my research work and following error is observed while running the fractal dimension Go command…

    Reference to non-existent field ‘CoordinateSystemType’.

    Error in Linear_structures>pushbutton17_Callback (line 1205)
    switch Reference.CoordinateSystemType

    Error in gui_mainfcn (line 96)
    feval(varargin{:});

    Error in Linear_structures (line 46)
    gui_mainfcn(gui_State, varargin{:});

    Error in
    @(hObject,eventdata)Linear_structures(‘pushbutton17_Callback’,hObject,eventdata,guidata(hObject))

    Error while evaluating uicontrol Callback

    I a using MATLAB 2017a version and what should be the Projection of the DEM.

    Please let me know if any issue from my side.

    Thanks and Regards

    Cheers
    Rakesh

    1. Dear Rakesh,
      Have you succeeded of same operation with testing dataset?
      If answer is “yes”, it looks like, your DEM (probably) has no readable projection.
      Output of Minkowski fractal dimension coverage requires it.
      Please, try Georeferenced DEM data (for instance from glcf.umd.edu) as an alternative. Mind the necessity of edge detection before.
      Keep in touch.
      Regards.
      P.S. your Geotiff should be opened as Geotiff, not the picture. Thanks for your feedback.

  2. Thank you for a prompt reply.
    Initially I have used the sample data for a test and it works fine, infact for my on dem data it works, I dont know why but now while importing the any data including sample data (via Geotiff) it showing following error,

    No appropriate method, property, or field CellExtentInWorldX for class
    spatialref.MapRasterReference.

    Error in Linear_structures>GeoOpen_Callback (line 174)
    space_res=(Reference.CellExtentInWorldX+Reference.CellExtentInWorldY)/2;

    Error in gui_mainfcn (line 96)
    feval(varargin{:});

    Error in Linear_structures (line 46)
    gui_mainfcn(gui_State, varargin{:});

    Error in
    @(hObject,eventdata)Linear_structures(‘GeoOpen_Callback’,hObject,eventdata,guidata(hObject))

    Error while evaluating uicontrol Callback

    Please let me know if I am doing something wrong or missing.

    Thanks

    1. Thank you for letting me know about you experience.
      The error you showed means that file’s Georeference has no pixel resolution. It happens to geographic data, with angular units.
      If you have such error with even projected data, try to reinstall script package simply by unpacking the archive once more.
      I also tried to fix error related to space resolution missing after repeated resampling and reverting, so you can download the archive once again.

  3. Hello Sergei,

    we have downloaded your matlab tool for lineament extraction.

    We did a very quick test with a high resolution DEM but we only manage to extract short lines and they are not what we would map by eye on the DEM. For sure we need to adjust the parameters.

    I have seen that you have an article related to the LEFA tool but…I only find a russian version. Do you have somewhere an explanation in English?

    Thanks,

    Benedetta

    1. Yeah, there is an English guide reference on this website. In the sample folder you may find both SRTM data and corresponding ESRI shape output. So, you can adjust image preprocessing, filters and parameters of extraction for relevant output. I hope, it will help.

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