My goal is to define the way leading from a point coverage to a raster.
Something like ST_Interpolate("pointgeomtable", "rastercolumn") -> raster. What
would be the step leading to that?
I guess we have everything now to store a Delaunay Triangulation as polyhedral
surfaces right?
Then from this polyhedral surface we can derive a raster...
Maybe a first ST_AsDelaunayTriangulation(geom) could be an aggregate SET
function returning a set of triangle...
and maybe ST_Interpolate(polyhedral surfaces) could be an aggregate function
that would aggregate those triangle into a raster?
What do you think?
>-----Original Message-----
>From: [email protected] [mailto:postgis-users-
>[email protected]] On Behalf Of Olivier Courtin
>Sent: 24 mars 2011 17:25
>To: PostGIS Users Discussion
>Subject: Re: [postgis-users] TIN from point coverage
>
>
>On Mar 24, 2011, at 9:33 PM, Pierre Racine wrote:
>
>Hi Pierre,
>
>> Is there a way now to produce a TIN (or Polyhedral surface I guess)
>> from a table of point geometry?
>
>Nope, as the (initial) use case for TIN is not coverage, but rather
>City Model
>(so small precomputed volumes)
>
>If we want such a thing we have to be able to triangulate the point
>cloud
>and to split the resulted TIN in several small subpart.
>
>--
>Olivier
>
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