[pdal] Syntax for implementing new filters.hag relative to TIN

[Andrew Bell]

On Mon, Nov 11, 2019, 06:12 Andrew Cunliffe <andrewmcunliffe at gmail.com>
wrote:

> Thanks for the help Andrew,
>
> Unfortunately this pipeline {"type": "filters.hag", "count": 4,
> "delaunay": 'true'}, is still throwing exceptions (non-zero Python exit
> code).
>
> I can imagine setting a larger count (e.g. 20-30) reduces the likelihood
> that the point under consideration lies beyond the interpolated TIN
> surface, but is it not possible to create a TIN from  ≥ 3 ground points?
> (Shouldn't this be fine as long as all the non-ground points lie within the
> extent of the triangle?)
>

Yes, but you have to choose the"right" points. I may be able to change
things so that this parameter isn't necessary. If you can share your data,
I'd love to use it as a test case and to experiment with the issue you're
having.

>
>
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