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<DIV><FONT face=Arial size=2>Hi,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV>For first excuse my english. I'm from Brazil and im speaking a bad
english.</DIV>
<DIV>I' m working on a project for public safety in my country.</DIV>
<DIV>I'm using maplab v2.0, mapserver 4.0.1 and PHP 4.3.3 on
windows<BR></DIV>
<DIV><FONT face=Arial size=2>I read the message post by Paul Spencer at
<FONT face="Times New Roman" size=3><EM>07 Oct 2002 </EM>about locate a
address (see above) and I put this code in my application:</FONT></FONT></DIV>
<DIV> </DIV>
<DIV>if ( $http_form_vars["parcel-number"] )<BR>{<BR> // the parcel number to
query for<BR> $szParcelNumber = $http_form_vars["parcel-number"];<BR><BR> // the
current extents will be the default if we fail.<BR> $oExtents =
$oMapSession->oMap->extents;<BR><BR> //first we need a handle on the
layer, let's assume that we have<BR> //it's name<BR> $oParcelLayer =
$oMapSession->oMap->getLayerByName( "Parcels" );<BR><BR> // set up the
layer for a query in ms 3.6 - in 3.7 we don't need<BR> // to do this, we can
just use querybyattribute. Here we assume<BR> // that the data file
associated with the layer has an attribute<BR> // called parcel_number that we
are querying.<BR> $oParcelLayer->set( "FILTERITEM", "parcel_number"
);<BR> $oParcelLayer->setFilter( $szParcelNumber );<BR> <BR> // use
querybyattribute to generate the result, assume a single<BR> // one for
simplicity but this can be extended to multiple<BR> // results
easily<BR> $oParcelLayer->queryByAttribute( MS_SINGLE );<BR><BR> //now check
to see if there are any results?<BR> if ($oParcelLayer->getNumResults() >
0 )<BR> {<BR> //at least one result, assume only one for this
example<BR> $oResult = $oParcelLayer->getResult( 0 );<BR> //oResult is a
resultCacheMemberObj<BR> $oShape = $oParcelLayer->getShape(
$oResult->tileindex,<BR> $oResult->shapeid
);<BR> $oExtents = $oShape->bounds;<BR> $oShape->free();<BR><BR> //at
this point we might add a buffer to the extents<BR> $nXBuffer = (
$oExtents->maxx - $oExtents->minx )*0.05;<BR> $nYBuffer = (
$oExtents->maxy - $oExtents->miny )*0.05;<BR> $nMinX = $oExtents->minx
- $nXBuffer;<BR> $nMaxX = $oExtents->maxx + $nXBuffer;<BR> $nMinY =
$oExtents->miny - $nYBuffer;<BR> $nMaxY = $oExtents->maxy +
$nYBuffer;<BR> $oExtents->setExtents( $nMinX, $nMinY, $nMaxX, $nMaxY
);<BR> }<BR><BR> // now use $oMapNavigator to navigate to the parcel<BR> //
location. There are two useful options now. We<BR> // can zoom to a
rectangle which we have calculated or<BR> // to a point and scale. Let's
assume we have calculated<BR> // a rectangle and put a buffer around it if
necessary.<BR> $oMapNavigator->zoomRectangle($oExtents->minx,
$oExtents->miny,<BR> $oExtents->maxx,
$oExtents->maxy);<BR><BR> // alternately if it's a point and a scale
...<BR> // $oMapNavigator->zoomScale( $nScale, $nX, $nY );<BR>}<BR></DIV>
<DIV><FONT face=Arial size=2>Whem I enter the parcel-number value, I get the
error: </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><STRONG>Fatal error</STRONG>: [MapServer Error]: msCalculateScale():
Invalid image extent. in <B>c:\......etc</B></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>What is wrong???</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Claudio</FONT></DIV>
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