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<DIV dir=ltr align=left><SPAN class=750054914-09022010><FONT color=#0000ff
size=2 face=Arial>Hello Ibo,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=750054914-09022010><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=750054914-09022010><FONT color=#0000ff
size=2 face=Arial>Unfortunately Mercator is not an equal area projection. In the
end I found a nice Mollweide projection (although there are plenty of
others that would have worked) that did what I needed:</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=750054914-09022010><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=750054914-09022010><FONT color=#0000ff
size=2 face=Arial>INSERT into spatial_ref_sys (srid, auth_name, auth_srid,
proj4text, srtext) values ( 954009, 'esri', 54009, '+proj=moll +lon_0=0 +x_0=0
+y_0=0 +ellps=WGS84 +datum=WGS84 +units=m +no_defs ',
'PROJCS["World_Mollweide",GEOGCS["GCS_WGS_1984",DATUM["WGS_1984",SPHEROID["WGS_1984",6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Mollweide"],PARAMETER["False_Easting",0],PARAMETER["False_Northing",0],PARAMETER["Central_Meridian",0],UNIT["Meter",1],AUTHORITY["EPSG","54009"]]')</FONT></SPAN></DIV>
<DIV><FONT color=#0000ff size=2 face=Arial></FONT> </DIV>
<DIV><FONT color=#0000ff size=2 face=Arial><SPAN
class=750054914-09022010>Regards</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff size=2 face=Arial><SPAN
class=750054914-09022010><BR>Kemal</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff size=2 face=Arial></FONT><BR> </DIV>
<DIV dir=ltr lang=en-us class=OutlookMessageHeader align=left>
<HR tabIndex=-1>
<FONT size=2 face=Tahoma><B>From:</B>
postgis-users-bounces@postgis.refractions.net
[mailto:postgis-users-bounces@postgis.refractions.net] <B>On Behalf Of
</B>ibrahim saricicek<BR><B>Sent:</B> 09 February 2010 16:38<BR><B>To:</B>
PostGIS Users Discussion<BR><B>Subject:</B> Re: [postgis-users] Polygon area in
meters<BR></FONT><BR></DIV>
<DIV></DIV>Hi;<BR><BR>don't know if official spatial reference or not but you
may use this one; <A
href="http://trac.openlayers.org/wiki/SphericalMercator">http://trac.openlayers.org/wiki/SphericalMercator</A><BR><BR>Regards..
IBO.. <BR></BODY></HTML>