[postgis-users] Assistance with st_convexhull

Appel, Tony tony.appel at navteq.com
Thu Sep 16 06:05:51 PDT 2010


Greetings.

I have a newbie question today.

I have been using an FME workbench to create convexhulls from a collection of points I provide to it using a script parameter. This works fine, most of the time. There are issues with my server setup that causes issues with FME. But let me get to my question

First let me preface it with a bit of generic information: I have a database with 2 tables, point and convexIMU.  The point table points are indexed on  projectid. A single projectid has anywhere from 50-400k points associated with it.

I need to create a convexhull polygon of each projectid set of points and place it into the convexIMU table. This would still be performed from our website we have operating over the database.
IE: User defines a new file of point data to load into "point", on load I wish to create the convexhull polygon in convexIMU.

I need some syntax assistance please!

Thanks in advance.


Tony



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