Adding dynamic points; clicking on point not working

[Bart van den Eijnden]

Did you try setting a TOLERANCE on your LAYER?

eg:

TOLERANCEUNITS PIXELS
TOLERANCE 3

Best regards,
Bart

On Sat, 18 Jun 2005 20:25:27 +0200, Hoeven, Maarten van der  
<Maarten.van.der.Hoeven at KNMI.NL> wrote:

> Dear list,
>
> I'm working with MapServer 4.6.0, PHP-Mapscript (Linux Suse9.2, Apache)  
> and I managed to query my (MySQL) database, and plot dots on the  
> appropriate lat/lon (see query below). However, I still can't manage to  
> retrieve some additional information, when clicking on a dot (displaying  
> all dots on a map is working okay). Im running with a modified  
> Gmap-demo, but the functionality is intact. To be specific, when I click  
> on a point, I got the message "Nothing found at query location."
>
> Can you give me some hints/tipsss/clues? The code below is written by  
> using some earlier examples on the list.
>
> My (1) query and plotting by using PHP-mapscript, and below that (2) my  
> map-file.
>
> Regards,
> Maarten van der Hoeven
>
> 1. ============
>
> $layerObj = $gpoMap->getLayerByName("points01");
> $classObj = $layerObj->getClass(0);
>
> $query = "SELECT sta_id, lat/3600 as y, lon/3600 as x FROM stations;";
> $result = mysql_query($query);
>
> $i=0;
> while (($row = mysql_fetch_array($result)))
> {
>      $pointObj = ms_newPointObj();
>      $pointObj->setXY($row['x'], $row['y']);
>      $line = ms_newLineObj();
>      $line->add($pointObj);
>      $shp = ms_newShapeObj(MS_SHAPE_POINT);
>      $shp->add($line);
>      $shp->{index} = $i;
>      if ($layerObj->addFeature($shp) == -1)
>      {
>         echo "addfeature failed!";
>      }
>      $i++;
>      $pointObj->draw($gpoMap, $layerObj, $img, 0, 'sta_id');
> }
>
> 2. ============
> #
> # Start of map file
> #
> # $Id: gmap75.map,v 1.23 2003/02/25 19:46:42 daniel Exp $
> #
> NAME DEMO
> STATUS ON
> DEBUG ON
> SIZE 400 300
> SYMBOLSET ../etc/symbols.sym
> EXTENT -70 10 70 80
> UNITS dd
> SHAPEPATH "../data"
> IMAGECOLOR 255 255 255
> FONTSET ../etc/fonts.txt
>
> OUTPUTFORMAT
>   NAME png
>   DRIVER "GD/PNG"
>   MIMETYPE "image/png"
>   IMAGEMODE PC256
>   EXTENSION "png"
> END
>
> QUERYMAP
>   STATUS ON
>   STYLE SELECTED
>   COLOR 255 0 0
> END
>
> #
> # Start of web interface definition
>
> WEB
>   MINSCALE 2000
>   MAXSCALE 50000000
>   IMAGEPATH "/webdata/ecad/htdocs/tmp/"
>   IMAGEURL "/tmp/"
>   LOG /tmp/gmap.log
> END
>
> #
> # Start of reference map
> #
> REFERENCE
>    IMAGE images/keymap.png
>    EXTENT -2200000 -712631 3072800 3840000
>    STATUS ON
>   COLOR -1 -1 -1
>   OUTLINECOLOR 255 0 0
>   SIZE 120 90
> END
>
> #
> # Start of legend
> #
> LEGEND
>   KEYSIZE 18 12
>   LABEL
>     TYPE BITMAP
>     SIZE MEDIUM
>     COLOR 0 0 89
>   END
>   STATUS ON
> END
>
> #
> # Start of scalebar
> #
> SCALEBAR
>   IMAGECOLOR 255 255 255
>   LABEL
>     COLOR 0 0 0
>     SIZE SMALL
>   END
>   SIZE 350 5
>   COLOR 255 255 255
>   BACKGROUNDCOLOR 255 0 0
>   OUTLINECOLOR 0 0 0
>   UNITS kilometers
>   INTERVALS 10
>   STATUS ON
> END
>
> LAYER
>     NAME points01
>       METADATA
>         "RESULT_FIELDS" "sta_id"
>     END
>     TEMPLATE void
>     TYPE POINT
>     STATUS ON
>     SYMBOLSCALE 50000
>     LABELITEM 'sta_id'
>     CLASSITEM 'sta_id'
>     CLASS
>         NAME 'sta_id'
>         STYLE
>             OUTLINECOLOR 255 255 255
>             COLOR 255 0 0
>             SYMBOL 7
>             SIZE 8
>             MAXSIZE 15
>             MINSIZE 15
>         END
>         LABEL
>             MINFEATURESIZE -1
>             POSITION UC
>             PARTIALS FALSE
>             COLOR '#000080'
>             SIZE GIANT
>         END
>     END
> END
>
> END # Map File
>
>



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