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s and merge in a single one. Use the St_Collect function to do that.<br><br=
>The bounding box function will give you the extent of the whole, as you de=
scribed. This is default behavior.<br>

<br>Att<br><br><div class=3D"gmail_quote">On Mon, May 3, 2010 at 9:28 AM, O=
scar Zamudio <span dir=3D"ltr">&lt;<a href=3D"mailto:cmntlk at gmail.com">cmnt=
lk at gmail.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" sty=
le=3D"margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204);=
 padding-left: 1ex;">

Hi all,<div>I&#39;m using the extent function to get the geographic coverag=
e of a table. That function returns a bounding box, i.e. a polygon with 4 p=
oints (XMin YMin ...etc). I do know that the actual coverage of teh table i=
s not a four points polygon but an arbitrary polygonal shape with many vert=
exs. I want to get this shape form the same table. There is any function or=
 operation that can give me that shape?</div>


<div>Regards,</div><div>Oscar</div>
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<br></blockquote></div><br><br clear=3D"all"><br>-- <br>George R. C. Silva<=
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