[pdal] New dimension from filters.height

[Vaclav Petras]

Hi all,

the filter height [1] adds another dimension called Height. I have two
questions related to this.

1) How can I access this dimension in C++? Taking its ID from the list of
dimensions

  point_view->dims().back()

works for me but I though I can get its ID directly by something like

  pdal::Dimension::id("Height")

2) Why it is using custom dimension when there is HeightAboveGround?

  pdal::Dimension::Id::HeightAboveGround

Thanks,
Vaclav

http://www.pdal.io/stages/filters.height.html
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