Question

how can ? change point cloud coordinate value in fme

  • 15 August 2018
  • 2 replies
  • 9 views

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hi everyone

? have polygons and point cloud. ? use Clipper

after that ? change point cloud z data

? need this math fonction (( all point cloud z value - polygon z value))

can you help me please

rsvp.


2 replies

Userlevel 2
Badge +17

Hi @veyselakatay, supposing all vertices of the polygon have an idential z-value, a possible way is:

  1. Extract Z of the polygon (clipper) with the ElevationExtractor.
  2. Merge the Z to the point cloud (clipee) when clipping.
  3. Move the point cloud with the Offsetter (set -Z to the Z Offset parameter).

Badge +2

Hi @veyselakatay,

The PointCloudExpressionEvaluator may also be worth investigating in your case. You can set the Component to 'z', Data Type to 'preserve' and the expression to be '@Component(z) - <polygon z value>'

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