hello there we need to calculate the length of each polygon edge , the polygona could be in irregular shape considering the polygon is 4 edges
if we use chopper or Geometrycoercer transformer we get many edge we are suppose to get only 4
Thanks
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You can use a BoundingBoxReplacer, with the option to use a 2D oriented bounding box. It’ll be rectangular and will generate attributes for the length of the long and short sides (so multiply both by 2 to get the total circumference
If you need to retain the original geometry you can use a GeometryExtractor before and a GeometryReplacer after the BoundingBoxReplacer.
if I use the bounding box we will not get the exact value of the edge length for each side
c
Can you provide some more information?
Of which 4 edges do you want to calculate the length?
Below I sketch 3 different possible definitions, but maybe you want yet another one.
Thanks for the your response
the Goal is to extract each 4 line and calculate their length
as its is presented in color
I can think of an algorithm for this particular polygon, but it will not work for all polygons.
For this polygon I would isolate the 2 longest segments, and combine the other segments if they are connecting to each other.
But this will not work when the two longest segments of your polygon share a vertex, or when the long segments are made up of several shorter segments. So this is by no means a complete solution.
The attached workspace makes use of the custom transformer PolylineAnalyzer from FME Hub. This transformer calculates a lot of other useful information, that may lead to other solutions.
I can think of an algorithm for this particular polygon, but it will not work for all polygons.
For this polygon I would isolate the 2 longest segments, and combine the other segments if they are connecting to each other.
But this will not work when the two longest segments of your polygon share a vertex, or when the long segments are made up of several shorter segments. So this is by no means a complete solution.
The attached workspace makes use of the custom transformer PolylineAnalyzer from FME Hub. This transformer calculates a lot of other useful information, that may lead to other solutions.
Very useful
if we need to calculate the edge length for the below case what will be your approach
thanks
For this, I would start with isolating the 4 longest line segments, create a new polygon from those segments, and calculate the length of the 4 sides of that polygon.
Like my previous idea I suspect this may not work for all polygons.
