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<DIV dir=ltr align=left><FONT color=#0000ff size=2 face=Arial><SPAN
class=738234203-23012012>Just tried it on my latest build which is about a week
old (a little newer than the windows build currently on site but much older than
when this doc section was written). Works fine for me.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT color=#0000ff size=2 face=Arial><SPAN
class=738234203-23012012></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT color=#0000ff size=2 face=Arial><SPAN
class=738234203-23012012>Which version of PostGIS are you
using?</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT color=#0000ff size=2 face=Arial><SPAN
class=738234203-23012012></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT color=#0000ff size=2 face=Arial><SPAN
class=738234203-23012012>Run this command:</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT color=#0000ff size=2 face=Arial><SPAN
class=738234203-23012012> select postgis_scripts_build_date(),
postgis_raster_lib_build_date();</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT color=#0000ff size=2 face=Arial><SPAN
class=738234203-23012012></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT color=#0000ff size=2 face=Arial><SPAN
class=738234203-23012012>Make sure both return a value later than
2011-01-01</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT color=#0000ff size=2 face=Arial><SPAN
class=738234203-23012012></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT color=#0000ff size=2 face=Arial><SPAN
class=738234203-23012012>Hope that helps,</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT color=#0000ff size=2 face=Arial><SPAN
class=738234203-23012012>Regina</SPAN></FONT></DIV><BR>
<BLOCKQUOTE
style="BORDER-LEFT: #0000ff 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px"
dir=ltr>
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<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>Deepak R aj Awasthi<BR><B>Sent:</B> Sunday, January 22, 2012 12:13
PM<BR><B>To:</B> postgis-users@postgis.refractions.net<BR><B>Subject:</B>
[postgis-users] ST_MapAlgebraExpr() Function<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV
style="BACKGROUND-COLOR: #fff; FONT-FAMILY: times new roman, new york, times, serif; COLOR: #000; FONT-SIZE: 12pt">
<DIV>
<DIV><SPAN
style="FONT-FAMILY: times, serif; FONT-SIZE: 12pt">Hello,</SPAN><BR></DIV>
<DIV style="FONT-SIZE: 12pt" class=yui_3_2_0_22_132725134565854>
<DIV style="FONT-SIZE: 12pt" class=yui_3_2_0_22_132725134565861>
<DIV id=yiv1694752926>
<DIV>
<DIV style="FONT-SIZE: 12pt" class=yui_3_2_0_22_132725134565869>
<DIV style="FONT-FAMILY: times, serif; FONT-SIZE: 12pt"
class=yui_3_2_0_22_132725134565879>
<DIV style="FONT-SIZE: 12pt" class=yui_3_2_0_22_132725134565881><BR>I am a
M.Sc. student and currently working with postgreSQL/PostGIS to
handle raster. I have installed PostgreSQl 9.0 and
PostGIS 2.0 in windows 7 home premium OS. I had no
problem on handling raster so far but now I got problem while accessing
ST_MapAlgebraExpr () function which takes two rasters as function
arguments. I have followed the example provided in the link below as
follows.</DIV>
<DIV style="FONT-SIZE: 12pt" class=yui_3_2_0_22_132725134565881><BR></DIV>
<DIV style="FONT-SIZE: 12pt" class=yui_3_2_0_22_132725134565881>First, I
create the table as given,</DIV>
<DIV style="FONT-SIZE: 12pt" class=yui_3_2_0_22_132725134565881><BR></DIV>
<DIV style="FONT-SIZE: 12pt" class=yui_3_2_0_22_132725134565881><PRE style="BORDER-BOTTOM: rgb(247,147,30) 2px solid; BORDER-LEFT: rgb(247,147,30) 0px solid; PADDING-BOTTOM: 10px; LINE-HEIGHT: 16px; OVERFLOW-X: auto; OVERFLOW-Y: auto; MARGIN-TOP: 10px; PADDING-LEFT: 10px; PADDING-RIGHT: 10px; FONT-FAMILY: 'Courier New', Courier, Monaco, monospace; MARGIN-BOTTOM: 10px; COLOR: rgb(46,46,46); FONT-SIZE: 11px; BORDER-TOP: rgb(247,147,30) 2px solid; BORDER-RIGHT: rgb(247,147,30) 0px solid; PADDING-TOP: 10px; background-origin: initial; background-clip: initial; border-top-left-radius: 2px; border-top-right-radius: 2px; border-bottom-right-radius: 2px; border-bottom-left-radius: 2px" class=programlisting>CREATE TABLE fun_shapes(rid serial PRIMARY KEY, fun_name text, rast raster);</PRE>Then,
the second syntax to insert raster and finally the use of the function
ST_MapAlgebraExpr() as.</DIV>
<DIV style="FONT-SIZE: 12pt" class=yui_3_2_0_22_132725134565881><PRE style="BORDER-BOTTOM: rgb(247,147,30) 2px solid; BORDER-LEFT: rgb(247,147,30) 0px solid; PADDING-BOTTOM: 10px; LINE-HEIGHT: 16px; OVERFLOW-X: auto; OVERFLOW-Y: auto; MARGIN-TOP: 10px; PADDING-LEFT: 10px; PADDING-RIGHT: 10px; FONT-FAMILY: 'Courier New', Courier, Monaco, monospace; MARGIN-BOTTOM: 10px; COLOR: rgb(46,46,46); FONT-SIZE: 11px; BORDER-TOP: rgb(247,147,30) 2px solid; BORDER-RIGHT: rgb(247,147,30) 0px solid; PADDING-TOP: 10px; background-origin: initial; background-clip: initial; border-top-left-radius: 2px; border-top-right-radius: 2px; border-bottom-right-radius: 2px; border-bottom-left-radius: 2px" class=programlisting>SELECT ST_MapAlgebraExpr(
area.rast, bub.rast, 'rast2', '8BUI', 'INTERSECTION', 'rast2', 'rast1') As interrast,
ST_MapAlgebraExpr(
area.rast, bub.rast, 'rast2', '8BUI', 'UNION', 'rast2', 'rast1') As unionrast
FROM
(SELECT rast FROM fun_shapes WHERE
fun_name = 'area') As area
CROSS JOIN (SELECT rast
FROM fun_shapes WHERE
fun_name = 'rand bubbles') As bub</PRE></DIV>
<DIV style="FONT-SIZE: 12pt" class=yui_3_2_0_22_132725134565881><SPAN
style="FONT-SIZE: 12pt"></SPAN><BR> </DIV>
<DIV style="FONT-SIZE: 12pt" class=yui_3_2_0_22_132725134565881> <A
href="http://postgis.refractions.net/documentation/manual-svn/RT_ST_MapAlgebraExpr2.html"
rel=nofollow
target=_blank>http://postgis.refractions.net/documentation/manual-svn/RT_ST_MapAlgebraExpr2.html</A><BR><BR></DIV>
<DIV style="FONT-SIZE: 12pt" class=yui_3_2_0_22_132725134565881>But I got
error on using this syntax as:<BR><BR>ERROR: function
st_mapalgebraexpr(raster, raster, unknown, unknown, unknown,
unknown, unknown) does not exist<BR> LINE 58: SELECT
ST_MapAlgebraExpr()<BR> HINT: No function matches the
given name and argument types. You might need to add explicit type
casts.<BR><SPAN style="FONT-SIZE: 12pt"><BR></SPAN></DIV>
<DIV style="FONT-SIZE: 12pt" class=yui_3_2_0_22_132725134565881><SPAN
style="FONT-SIZE: 12pt"> Although I am new to this database, I think that
there is problem with </SPAN><SPAN style="FONT-SIZE: 12pt"> PostGIS
2.0 to support the function. If this the case which version I
have </SPAN><SPAN style="FONT-SIZE: 12pt"> to install to use this
function. Can anyone provide me solution for it.</SPAN></DIV>
<DIV style="FONT-SIZE: 12pt"
class=yui_3_2_0_22_132725134565881><BR> Thanks<BR><BR> With Best
Regards,<BR> Deepak<BR><BR></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></BLOCKQUOTE></BODY></HTML>