[mapserver-users] Create Dynamic Pt Layer, then queryByPoint()

[Stephen Woodbridge]

Dan,

The LAYER must have TEMPLATE defined or it will NOT be queried so make
sure you have that set.

-Steve

Dan Barron wrote:
> 
> I'm new Mapserver, been working with it for a few weeks now. This list and
> its archives have been a great resource of experience to draw on!  I'm
> hoping someone can help me with a problem I seem to be having.
> 
> I am trying to do the following:
> 
> 1) using PHP/Mapscript, query a database of georef points, then create a
> dynamic layer of type POINT to display them
> 2) then use the queryByPoint() function to query a point
> 3) also use the queryByRect() function to query the whole current view ( a
> suggestion found in another post )
> 
> Well, 1) is successful but 2) & 3) returns MS_FAILURE value or 1 - doesn't
> find anything.  I would have expected 3) to at least find something since
> there are points being displayed in the current extent.  I have looked
> through all the examples and the mail list archive to no avail at this
> point.  Below are the relevant parts of my map file and php file.
> 
> Anyone know the trick to this? Thanks!
> 
> Dan Barron
> Destination Software LLC
> San Diego, CA
> dbarron at ddive.com
> 
> << snip from map file for the point layer>>
> -------------------------------------------
> LAYER
>    NAME 'point-test'
>    TYPE POINT
>    STATUS OFF
>    CLASS
>      name 'point-test'
>      SYMBOL 'c:\bin\mapserver\mapservertest\graphics\novice-icon.png'
>      template 'point-test-template.html'
>    END
>    tolerance 10
> END
> 
> << snip from php file for the point query>>
> -------------------------------------------
>   // turn it into lat lon values
>    $georef_x = $mapext->minx + ($pix_x/$w)*($mapext->maxx-$mapext->minx);
>    $georef_y = $mapext->maxy - ($pix_y/$h)*($mapext->maxy-$mapext->miny);
>    $georef_pt = ms_newPointObj();
>    $georef_pt->setXY( $georef_x, $georef_y);
> 
>    // set the new extent values
>    $my_extent = ms_newrectObj();
>    $my_extent->setextent($extent_to_set[0],$extent_to_set[1],
>                                  $extent_to_set[2],$extent_to_set[3]);
> 
>    $mode = $HTTP_POST_VARS["mode"];
>    if( $mode == $query_selected ) {
>            $zoom_factor = 0;
>            $check_query = "checked";
> 
>         // query by point defined by mouse click
>         $found = $map->queryByPoint($georef_pt, MS_SINGLE, -1);
>            echo "query found=".$found."<br>";
> 
>            $qr = ms_newRectObj();
>            $qr->setextent($extent_to_set[0],$extent_to_set[1],
>                             $extent_to_set[2],$extent_to_set[3]);
> 
>            // query by rectObj the size of current view extent
>         $found = $map->queryByRect($qr);
>            echo "query found=".$found."<br>";