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I have 18 polygons in a database. I want to retrieve the x and y value of each CenterPoint of the shorter side of each polygon (approximately where the red dot is on image). I also want to create a new attribute called sequence. The first polygon on the left should get the value 1, the second value 2, the third one value 3 and so on. How can I achieve this ?

image

Hi @katt​,

To sequence, use a BoundsExtractor to get the XMax of the polygons, then a Sorter to sort on XMax, ascending. After sorting, use a Counter to assign the sequence number.

Hi @katt​,

To generate the center points:

  • Dissolver to dissolve all the polygons into one
  • GeometryCoercer to convert new polygon to line
  • Chopper to chop into 2-vertex segments
  • LengthCalculator to calculate length of segment
  • Sorter to sort by length, descending
  • Sampler to Sample First N Features and Sample rate of 2
  • Use NotSampled output of Sampler to get the short segments only
  • CenterpointReplacer with Mode Center Point of Bounding Box to get center point of segments

 

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