[postgis-users] Can I replace all the x and y coordinates of a geometry using PostGIS, Thank you!

[Nicolas Ribot]

> Hi, Leo:
>
> Thank you for your reply!
> May be I did not tell my problem clearly,
> Now, I want to know how i can get the number of points that stand for a
> polygon.
> Just like the function of NumPoints(geometry) used for linestring.
>

npoints(geometry) for a polygon

> And how can I locate each coordinate in the polygon?
> Looking forward your reply!
> Thanks a lot!
>

Have a look at this recent thread:
Postgis for dummies

Nicolas