Hello. If I have a table like this create table fleet ( ship_id integer, location point); and fill it with a lot of ships and their locations and then want to create an index on this to speed up operations on finding ships within a certain region (let's say its a rectangular region), how do I do this? I tried: CREATE INDEX my_index ON fleet USING gist ( box(location,location)); ? and that command worked, but I have no idea why and what I have just done. The docs are a little to advanced. How should one do it? -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general