I have a table with a point column. Is there a way to find the boundary or convex hull of some of the entries in that table? For instance, if I want to find the extents of each country in the table, can I say insert into country_extents (country, geom) values (select country, ST_XXX(point) from waypoint group by country));

--
Paul Tomblin <[EMAIL PROTECTED]> http://blog.xcski.com/
"I'm cruising down the Information Superhighway in high gear, surfing the
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