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In QGIS 2.12.0 Lyon I have a problem while using the FlowMapper plugin. But I don't know why. This is the message:

Traceback (most recent call last):
File ".../python/plugins\FlowMapper\flowmapper.py", line 2656, in run
flowpyv07.shapefilemaker(FlowType,CreateShpNodes,IncludeNodeNames,str(SaveDirectory), str(SaveShpName),str(SaveShpNameNodes),str(InputMatrixName),str(InputNodesName),str(InputNodeNamesName),str(combotext))
File ".../python/plugins\FlowMapper\flowpyv07.py", line 51, in shapefilemaker
onevalue = float(separatestrings[columns])
IndexError: list index out of range
Python-Version: 2.7.5 (default, May 15 2013, 22:44:16) [MSC v.1500 64 bit (AMD64)] 
QGIS-Version: 2.12.0-Lyon Lyon, cd9d645
Taras ♦
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asked Mar 10, 2016 at 20:38
3
  • My guess is that you are using float values (numbers with a decimal) which it doesn't like. Perhaps try rounding these values to integers? Commented Mar 11, 2016 at 11:05
  • Thank you. I use float value for coordinates. This seems to be the problem (error in line 51). If I read coordinate file in libreoffice, there is no decimal separator. But in txt file there is one. Is this the problem? I will try later. Commented Mar 11, 2016 at 16:49
  • Welcome to gis.stackexchange! Please note that a good question on this site is expected to show some degree of research on your part, i.e. what you have tried and - if applicable - code so far. For more info, you can check our faq. Commented Mar 11, 2016 at 20:41

1 Answer 1

2

I have recently faced the same problem and handled it.

Therefore, I am providing some hints for those who are still struggling:

  • Text file (.txt) that stores node coordinates should be in the following format:

    Proper_coordinates

    • No column titles, e.g. long, lat.
    • Coordinates go only with dots
    • Space in between long and lat, not TAB.

  • Text file (.txt) that defines flow matrix should look like:

    Proper_matrix

    • Space in between matrix values, not TAB.
    • All empty values are 0 (numbers zero), not NULL or Empty space.
    • Delete other empty columns and rows where data is not stored.

Then everything should work as intended.

I am using the Notepad++ for replacing: Ctrl+F

References:

answered May 28, 2018 at 14:57

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