[Mapserver-users] PHP/MapScript question: How to return values when map is clicked?
har mar
shaz_bot42 at yahoo.com
Fri Sep 12 09:46:37 EDT 2003
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Thanks, that and the examples linked to helped. However, I am running into an error wen I use getLayer or getLayerByName. If I use getLayerByName it tells me it failed (getLayerByName failed for : state)
I have checked my .map file, and in my .map fil it is indeed called state
LAYER
NAME state
However if I use $layer = $myMap->getLayer, I get the following error
Warning: [MapServer Error]: msQueryByPoint(): No matching record(s) found.
Yet I clicked in a state, so I would assume it would have to return the statename (and everything else in the dbf file) to me.
I wonder what is going on.
Thankyou
Har
Krung Saengpole <krung at cad.go.th> wrote:
use queryByPoint(...). But you have to convert point in image to georef and make a pointObj from it. e.g.
$point=ms_newPointObj();
$point->setXY(x_coordinate, y_coordinate);
if (@$layer->queryByPoint($point,MS_SINGLE,0) == MS_SUCCESS) {
$result = $layer->getResult(0);
$index = $result->shapeindex+1;
$dbf = dbase_open(DBF_FILE,0);
$arr = dbase_get_record($dbf,$index);
......
HTH
Krung
---------- Original Message ----------------------------------
From: har mar
Date: Thu, 11 Sep 2003 13:05:26 -0700 (PDT)
>Hello,
>
>I am displaying a shapefile that contains states as a GIF. I am not using javascript at all. When the user clicks on the map, I want to return the name of the state that was clicked, and some other information that is in the dbf file. How do I do this? I can get the x,y coords by having the GIF set as an input type. I assume I will have to convert them to georef coords. But I am unsure of what 'function' to use to get those results. Any help would be greatly appreciated.
>
>Cheers
>
>
>
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<DIV>Thanks, that and the examples linked to helped. However, I am running into an error wen I use getLayer or getLayerByName. If I use getLayerByName it tells me it failed (getLayerByName failed for : state)</DIV>
<DIV> </DIV>
<DIV>I have checked my .map file, and in my .map fil it is indeed called state</DIV>
<DIV> </DIV>
<DIV>LAYER<BR> NAME state</DIV>
<DIV> </DIV>
<DIV>However if I use $layer = $myMap->getLayer, I get the following error</DIV>
<DIV> </DIV>
<DIV><STRONG>Warning</STRONG>: [MapServer Error]: msQueryByPoint(): No matching record(s) found.</DIV>
<DIV> </DIV>
<DIV>Yet I clicked in a state, so I would assume it would have to return the statename (and everything else in the dbf file) to me. </DIV>
<DIV> </DIV>
<DIV>I wonder what is going on. </DIV>
<DIV> </DIV>
<DIV>Thankyou</DIV>
<DIV> </DIV>
<DIV>Har</DIV>
<DIV><BR><BR><B><I>Krung Saengpole <krung at cad.go.th></I></B> wrote:</DIV>
<BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">use queryByPoint(...). But you have to convert point in image to georef and make a pointObj from it. e.g.<BR><BR>$point=ms_newPointObj();<BR>$point->setXY(x_coordinate, y_coordinate);<BR><BR>if (@$layer->queryByPoint($point,MS_SINGLE,0) == MS_SUCCESS) {<BR>$result = $layer->getResult(0);<BR>$index = $result->shapeindex+1;<BR>$dbf = dbase_open(DBF_FILE,0);<BR>$arr = dbase_get_record($dbf,$index);<BR>......<BR><BR>HTH<BR>Krung<BR><BR>---------- Original Message ----------------------------------<BR>From: har mar <SHAZ_BOT42 at YAHOO.COM><BR>Date: Thu, 11 Sep 2003 13:05:26 -0700 (PDT)<BR><BR>>Hello,<BR>> <BR>>I am displaying a shapefile that contains states as a GIF. I am not using javascript at all. When the user clicks on the map, I want to return the name of the state that was clicked, and some other information that is in the dbf file. How do I do this? I can get
the x,y coords by having the GIF set as an input type. I assume I will have to convert them to georef coords. But I am unsure of what 'function' to use to get those results. Any help would be greatly appreciated. <BR>> <BR>>Cheers<BR>> <BR>><BR>><BR>>---------------------------------<BR>>Do you Yahoo!?<BR>>Yahoo! SiteBuilder - Free, easy-to-use web site design software<BR>>_______________________________________________<BR>>Mapserver-users mailing list<BR>>Mapserver-users at lists.gis.umn.edu<BR>>http://lists.gis.umn.edu/mailman/listinfo/mapserver-users<BR>><BR>><BR>><BR><BR>_______________________________________________<BR>Mapserver-users mailing list<BR>Mapserver-users at lists.gis.umn.edu<BR>http://lists.gis.umn.edu/mailman/listinfo/mapserver-users</BLOCKQUOTE><p><hr SIZE=1>
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