It sounds like you want to draw the "convex hull" around your points.
http://en.wikipedia.org/wiki/Convex_hull

The easiest algorithm is called "gift wrap"
http://en.wikipedia.org/wiki/Gift_wrapping_algorithm

Here's some java source code
http://www.cs.rpi.edu/~hulber/cgeom/

http://www.cs.rpi.edu/~hulber/cgeom/giftWrap.java

On Oct 31, 6:36 am, Maria1999 <[EMAIL PROTECTED]> wrote:
> Hi all,
>
> how can i draw a gpolygon around my markers?
>
> I create the marker dynamic from a database, after them i will get a
> polygone around them.
>
> Is there any example or a solution out there .. :-)   ?
>
> I use php with a mysql database to create the marker.
>
> Greetings from germany.
>
> Maria
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