[pdal] writers.gdal: median

Jim Klassen klassen.js at gmail.com
Mon Jan 31 08:35:15 PST 2022



On 1/31/22 10:29, Andrew Bell wrote:
>
>
> On Mon, Jan 31, 2022 at 11:06 AM Jim Klassen <klassen.js at gmail.com> wrote:
>
>
>     A hack to save half the memory would be to use std::vector<float> instead of std::vector<double>.  The data I am working with is fine with 6 decimal digits of vertical precision (1cm at 1000m).  I'd might feel differently about that if I was working in mountainous areas.
>
>
> If you're going to pursue this, I would recommend writing a separate filter. You can now write rasters with writers.raster, so the filter can do whatever and just pass the raster on to the writer. You might also look at filters.zsmooth (which seems to be missing from the doc index). It's not exactly what you're looking for, but it could be modified to do something quite similar with not much effort. It only runs in standard mode.
>
> -- 
> Andrew Bell
> andrew.bell.ia at gmail.com

That's interesting.
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