Hello, really good advices here! But -
On Sun, Oct 17, 2010 at 2:37 AM, Rob Sargent <robjsargent@gmail.com> wrote:
> I just read the "anonymously" part, so I take it you have ruled out
> recording the given coordinate components directly, in multiple columns
> presumably? Otherwise it seems you could then do a) a composite key and b)
> queries directly against coordinate values.
what do you mean here? Do you suggest using line segments
instead of points in my records or something else?
Regards
Alex