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Question

insert points within grid cells at the same location

  • June 1, 2026
  • 6 replies
  • 89 views
stu888
Contributor
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Hi,

 

I have a regular grid of 50 x 50 cells (polygon features). These cells cover an overall area which can vary each time the workbench is run resulting in a different number of cells generated.  

 

Within each cell I want to place points at specific locations (the same relative locations in each 50 x 50 cell but not  themselves arranged in a regular grid).

 

Currently I utilise the bounding box of the overall area to define the point locations for the grid cell in the bottom left corner (point locations based on x_min+number, y_min+number). 

 

What is the best way to insert points in the other cells?  I can use an offsetter to move the points in each direction but there might be a significant number of other cells and the number of cells isn't known. 

 

Thanks

      6 replies

      j.botterill
      Influencer
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      • j.botterillInfluencer
      • Influencer
      • June 2, 2026

      Offsetter is not scalable

      Perhaps AffineWarper where the paramaters 

      Scale X = 50 Scale Y = 50 Offset X = xmin Offset Y = ymin

      stu888
      Contributor
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      • stu888Contributor
      • Author
      • Contributor
      • June 2, 2026

      Offsetter is not scalable

      Perhaps AffineWarper where the paramaters 

      Scale X = 50 Scale Y = 50 Offset X = xmin Offset Y = ymin

      Thanks for the reply - not sure what geometry should be used in that transformer to move points (essentially each of the 10 points within the first cell can be moved in 50m increments on both X and y axis,  to fully cover the extent of a larger (but variable) bounding area. 

      j.botterill
      Influencer
      Forum|alt.badge.img+58
      • j.botterillInfluencer
      • Influencer
      • June 3, 2026

      you might have VertexCreator prior to this transformer. Can you share the workspace, sampler for 1 feature and saved as a template, or some screen shots

      geomancer
      Evangelist
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      • geomancerEvangelist
      • Evangelist
      • June 3, 2026

      Does the 2DGridAccumulator give the results you want?

      Every point is placed at the same relative location within its polygon.

       

        stu888
        Contributor
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        • stu888Contributor
        • Author
        • Contributor
        • June 3, 2026

        Does the 2DGridAccumulator give the results you want?

        Every point is placed at the same relative location within its polygon.

         

        That image does seem to be what I require. Will test and report back, for 10 points would that be 10 separate implementations of the 2d grid accumulator?

        geomancer
        Evangelist
        Forum|alt.badge.img+64
        • geomancerEvangelist
        • Evangelist
        • June 3, 2026

        Yes, processing 10 separate points can be done with 10 2DGridAccumulators.

        Alternatively you could add 9 Offsetters or 9 VertexCreators after the SpatialFilter to move the points to another location.

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