[Mapserver-users] Problem Selecting a Feature
Benjamin Wragg
bwragg at tpg.com.au
Tue Jan 28 18:30:09 EST 2003
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Hi all,
I have the following layer defined in my map file:
LAYER
CONNECTIONTYPE postgis
NAME "testpoints"
CONNECTION "user=user password=password dbname=dbname host=localhost"
DATA "the_geom from testpoints"
STATUS ON
TYPE POINT
CLASS
NAME "All Points"
COLOR 0 0 0
SIZE 10
SYMBOL 2
END
END
If I run the following code:
$layer=$map->getlayerbyname("aLayer");
$class=ms_newClassObj($layer);
$class->set("name", "Selected Feature");
$class->setexpression('gid='.$featureGID);
$colorId=$map->addColor(255,0,0);
$class->set("color", $colorId);
$class->set("size", 20);
$class->set("symbol", 2);
$layer->set("status", MS_ON);
$image=$map->draw();
$imageURL=$image->saveWebImage(MS_PNG,1,1,0);
I also generate a legend and replace the images in the browser with the
newly generated images. The problem is that I can't see the feature on
the map, but a new class shows up on the legend. What am I missing?
Thanks,
Benjamin
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<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Hi all,</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>I have the following layer defined in my map =
file:</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=3DMsoNormal style=3D'margin-left:36.0pt'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>LAYER</span></font></p>
<p class=3DMsoNormal style=3D'margin-left:36.0pt'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'> CONNECTIONTYPE =
postgis</span></font></p>
<p class=3DMsoNormal style=3D'margin-left:36.0pt'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'> NAME =
"testpoints"</span></font></p>
<p class=3DMsoNormal style=3D'margin-left:36.0pt'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'> CONNECTION =
"user=3Duser
password=3Dpassword dbname=3Ddbname =
host=3Dlocalhost"</span></font></p>
<p class=3DMsoNormal style=3D'margin-left:36.0pt'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'> DATA "the_geom =
from testpoints"</span></font></p>
<p class=3DMsoNormal style=3D'margin-left:36.0pt'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'> STATUS =
ON</span></font></p>
<p class=3DMsoNormal style=3D'margin-left:36.0pt'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'> TYPE =
POINT</span></font></p>
<p class=3DMsoNormal style=3D'margin-left:36.0pt'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'> </span></font></p>
<p class=3DMsoNormal style=3D'margin-left:36.0pt'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'> =
CLASS</span></font></p>
<p class=3DMsoNormal style=3D'margin-left:36.0pt'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'> NAME =
"All Points"</span></font></p>
<p class=3DMsoNormal style=3D'margin-left:36.0pt'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'> COLOR 0 =
0 0</span></font></p>
<p class=3DMsoNormal style=3D'margin-left:36.0pt'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'> SIZE =
10</span></font></p>
<p class=3DMsoNormal style=3D'margin-left:36.0pt'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'> SYMBOL =
2</span></font></p>
<p class=3DMsoNormal style=3D'margin-left:36.0pt'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'> END =
</span></font></p>
<p class=3DMsoNormal style=3D'margin-left:36.0pt'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>END</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>If I run the following code:</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'> =
=
$layer=3D$map->getlayerbyname(“aLayer”);</span></font></p>=
<p class=3DMsoNormal style=3D'text-indent:36.0pt'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>$class=3Dms_newClassObj($lay=
er);</span></font></p>
<p class=3DMsoNormal style=3D'text-indent:36.0pt'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>$class->set("name&qu=
ot;,
"Selected Feature");</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'> =
=
$class->setexpression('gid=3D'.$featureGID);</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'> =
$colorId=3D$map->addColor(255,0,0);</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'> =
$class->set("color",
$colorId);</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'> =
$class->set("size",
20);</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'> =
$class->set("symbol",
2);</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'> =
$layer->set("status",
MS_ON);</span></font></p>
<p class=3DMsoNormal><a name=3D"OLE_LINK1"><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'> &nbs=
p; =
$image=3D$map-></span></font></a><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>draw();</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'> =
=
$imageURL=3D$image->saveWebImage(MS_PNG,1,1,0);</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>I also generate a legend and replace the images in =
the
browser with the newly generated images. The problem is that I =
can’t see
the feature on the map, but a new class shows up on the legend. What am =
I
missing?</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Thanks,</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Benjamin</span></font></p>
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