Wednesday, 26 August 2015

How to determine the longest side of a polygon in QGIS?


Is there a possibility to determine the longest side of a polygon with QGIS? As I need to do that for hundreds of polygons I would prefer an automized method (like a plugin).



So far my idea was:



  • transforming a polygon into a line

  • cut it on the vertices

  • measure the length

  • here I became stuck, how to become the longest line without checking the whole bunch of lines one by one?


looking forward to your answer




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