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Add algorithm documentation for regridding/smoothing operations #172

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svniemeijer opened this issue Feb 28, 2018 · 2 comments
Closed
5 tasks

Add algorithm documentation for regridding/smoothing operations #172

svniemeijer opened this issue Feb 28, 2018 · 2 comments
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algorithms documentation s5p-vdaf Applicable for S5P-MPC VDAF project
Milestone
1.19

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@svniemeijer
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svniemeijer commented Feb 28, 2018 •
edited

We should describe the algorithms behind our binning/regridding/smoothing operations:

  • bin
  • bin_spatial
  • derive_smoothed_column
  • regrid
  • smooth
@svniemeijer svniemeijer added documentation algorithms s5p-vdaf Applicable for S5P-MPC VDAF project labels Feb 28, 2018
@svniemeijer svniemeijer added this to the future milestone Jun 5, 2018
@svniemeijer
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Quick first explanation on bin_spatial() since this seems to come up frequently:

If the product only has lat/lon center coordinates and no latitude_bounds/longitude_bounds variables then a simple binning is performed (i.e. average of all values whose center point falls in the grid cell)
If the product does have latitude_bounds/longitude_bounds variables then an area weighted average is taken based on the intersections of the polygon areas and the grid cell (using a simple 2D plane, no spherical earth representation).

@svniemeijer svniemeijer modified the milestones: future, 1.19 Jun 25, 2023
@svniemeijer
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Implemented in d03365c

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algorithms documentation s5p-vdaf Applicable for S5P-MPC VDAF project
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