[mapserver-users] displaying query problem

[Stephen Woodbridge]

Pushkar,

You MUST also have a TEMPLATE statement in the LAYER or CLASS definition
or that layer will NOT be queried. It is sufficent to say

TEMPLATE void

-Steve

Pushkar Pradhan wrote:
> 
> Hi,
> I am trying to display query results, I am using code from the gmap demo.
> In short I do this, the gmapDumQueryResults() is unchanged from gmap demo.
> In my map file I have:
>    METADATA
>       "DESCRIPTION" "Buildings"
>       "RESULT_FIELDS" "Area Perimeter"
>    END
> Area and perimeter are the attribs I want displayed.
> When I query a point in my map I get:
> Nothing found at query location.  even though I click on a layer.
> This happens because the numResults val. in gmapDumpQueryResults() is
> zero:
>         $numResults = $oLayer->getNumResults();
> 
>         if ($numResults == 0)
>             continue;  // No results in this layer
> 
> php code:
> if ( isset($HTTP_POST_VARS["mode"]) ) {
>    $nClickPixX = intval($HTTP_FORM_VARS[mapa_x]);
>    $nClickPixY = intval($HTTP_FORM_VARS[mapa_y]);
>    $dfWidthPix = 600;
>    $dfHeightPix = 500;
>    $dfMinX = $map->extent->minx;
>    $dfMaxX = $map->extent->maxx;
>    $dfMinY = $map->extent->miny;
>    $dfMaxY = $map->extent->maxy;
>    if( $HTTP_POST_VARS["mode"] == "query") {
>       $nClickGeoX = GMapPix2Geo($nClickPixX, 0, $dfWidthPix, $dfMinX,
> $dfMaxX, 0);
>       $nClickGeoY = GMapPix2Geo($nClickPixY, 0, $dfHeightPix, $dfMinY,
> $dfMaxY, 1);
> 
>       $oClickGeo = ms_newPointObj();
>       $oClickGeo->setXY($nClickGeoX, $nClickGeoY);
> 
>       // Use '@' to avoid warning if query found nothing
>       @$map->queryByPoint($oClickGeo, MS_SINGLE, -1);
>       gmapDumpQueryResults();
>    }
> }   // end of if loop
> Do I need to call some other functions.
> ------------------------------------------------------------------------------
> PUSHKAR S. PRADHAN
> Research Assistant
> MISSISSIPPI STATE UNIVERSITY,
> STARKVILLE, MS 39759.
> 
> Engineering Research Center
> Box 9627
> Mississippi State, MS 39762-9627
> ------------------------------------------------------------------------------