[gdal-dev] weeding out x,y,z points

Joaquim Luis jluis at ualg.pt
Wed Feb 25 22:31:47 EST 2009

nicholas.g.lawrence at mainroads.qld.gov.au wrote:
> A client has a very large (millions of records) ascii file consisting
> solely of x,y,z co-ordinates.
> They would like to reduce the number of records by weeking out points that
> are too close to each other.
> Can GDAL or OGR weed out 3D points based on proximity to each other?

A job for GMT's blockmean or blockmedian.

Joaquim Luis

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