Extract Polygon information

Hi ​@boubcher , how are you?

Could you share the polygons for us?

Thanks in Advance,

Danilo

You can use the Chopper (max vertices = 2) to divide the polygon into segments, then use the HorizontalAngleCalculator to get their individual orientation, and the LengthCalculator to get their length.

Use the GeometryCoercer first to ensure the polygons become lines, otherwise you’ll end up with smaller polygons.

Also be careful with the coordinate system in use: If that is not a projected one (ie you have lat/lon instead of x/y), the angle- and length calculations will be incorrect.

The PolylineAnalyzer might be the most elegant solution.

That isn’t necessary, the output from the Chopper will only contain lines if max vertices = 2.

Also be careful with the coordinate system in use: If that is not a projected one (ie you have lat/lon instead of x/y), the angle- and length calculations will be incorrect.

True, you can also use the GeographicLengthCalculator if that is an issue.

The PolylineAnalyzer might be the most elegant solution.

I wasn’t aware of that one, looks interesting. It seems to have the same issue as the LengthCalculator regarding ground units, however?

​@david_r 
could  you please explain how  output of the angle and the azimuth from the Angle calculator will give me the orientation  , Est ,West ,North and South 

Thanks 

The azimuth values increase clockwise from the reference point of north (which represents zero degrees). So you could e.g. say that _azimuth values in the range 315-45 = North, 45-135 = East, etc.

Example:

Source: https://academic.brooklyn.cuny.edu/geology/leveson/core/linksa/comp.html