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<DIV><FONT face="Times New Roman" color=#000000 size=3>Hello.</FONT></DIV>
<DIV><FONT face="Times New Roman" color=#000000 size=3>If your vector layer has a numeric field, you can do this:</FONT></DIV>
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<DIV><FONT face="Times New Roman" color=#000000 size=3>- Add a new field of type DOUBLE</FONT></DIV>
<DIV><FONT face="Times New Roman" color=#000000 size=3>- Use the function SQRT in the field calculator so that</FONT></DIV>
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<DIV><FONT face="Times New Roman" color=#000000 size=3>NEW_FIELD = SQRT(NUMERIC_FIELD)</FONT></DIV>
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<DIV><FONT face="Times New Roman" color=#000000 size=3>- In the symbology dialog, choose 'proportional symbol' with your favorite settings.</FONT></DIV>
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<DIV><FONT face="Times New Roman" color=#000000 size=3>This is what you'll get:</FONT></DIV>
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<DIV><FONT face="Times New Roman" color=#000000 size=3><A href="http://www.prodevelop.es/files/fm/public/downloads/documents/screenshots/gvsig_desktop/ita.html">http://www.prodevelop.es/files/fm/public/downloads/documents/screenshots/gvsig_desktop/ita.html</A></FONT></DIV>
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<DIV><FONT face="Times New Roman" color=#000000 size=3>Circle area (not diameter) is proportional to population.</FONT></DIV>
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<DIV><FONT face="Times New Roman" color=#000000 size=3>Regards,</FONT></DIV>
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<DIV><FONT face="Courier New" size=2><FONT face="Times New Roman" size=3>Juan Lucas Domínguez Rubio<BR></FONT>---</FONT></DIV></DIV>
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<DIV><FONT face="Courier New" size=2><FONT face="Courier New" size=2><FONT face="Courier New" size=2>Prodevelop SL, Valencia (España)</FONT></DIV>
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<DIV><FONT face="Courier New" size=2>Tlf.: 96.351.06.12 -- Fax: 96.351.09.68<BR></FONT><A href="http://www.prodevelop.es/"><FONT face="Courier New" size=2>http://www.prodevelop.es</FONT></A><BR><FONT face="Courier New" size=2>---</FONT></DIV></FONT></DIV></FONT></DIV></BODY></HTML>