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How to keep maximum values when resampling a raster?

V

How would You make a workspace that does this?

If it is fast and can do very large datsets it is definitely a big plus...

Se also

https://knowledge.safe.com/idea/46222/new-interpolation-type-maximum-in-rasterresampler.html

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Best answer by takashi 20 June 2017, 17:23

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takashi
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Hi @vgurra, there seems not to be an efficient way to do that in the current FME, but the PointCloudStatsRasterizer from FME Hub with a preceding PointCloudCombiner could be a workaround in the interim. Assuming the source raster has a single band representing a terrain model, after transforming the raster into a point cloud with a PointCloudCombiner, apply the PointCloudStatsRasterizer with these parameters.

  • Component to Rasterize: z
  • Statistics Calculation Mode: maximum
  • X Cell Spacing: <x cell spacing for resampling>
  • Y Cell Spacing: <y cell spacing for resampling>

Hope this helps.

V

Hi @vgurra, there seems not to be an efficient way to do that in the current FME, but the PointCloudStatsRasterizer from FME Hub with a preceding PointCloudCombiner could be a workaround in the interim. Assuming the source raster has a single band representing a terrain model, after transforming the raster into a point cloud with a PointCloudCombiner, apply the PointCloudStatsRasterizer with these parameters.

  • Component to Rasterize: z
  • Statistics Calculation Mode: maximum
  • X Cell Spacing: <x cell spacing for resampling>
  • Y Cell Spacing: <y cell spacing for resampling>

Hope this helps.

Thanks a lot! I would not have found that solution myself.

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