Dear Andrew,
Thank you for the confirmation.So I will transfer that
into my php codes.
On Wed, Sep 8, 2010 at 3:17 AM, Andrew Leach <[email protected]>wrote:
> On 7 September 2010 20:02, ss ss <[email protected]> wrote:
> > Dear Andrew,
> > So only for polygon is better to use the mysql method
> is
> > it? Then for point is better to use this formula is it and much efficient
> > then the mysql method is it?
>
> MySQL's polygons are rectangular, so they are good for rectangles.
> They are not very good for circles; and for a circle you only need to
> know the distance of the point from the centre to see if the point is
> inside.
>
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