[Mapserver-users] MapServer ImageMap feature

[Dave Astolfo]

Hi,

I am trying to implement client-side Image Maps using the ImageMap
sample provided on the MapServer Wiki
(http://mapserver.gis.umn.edu/cgi-bin/wiki.pl?ImageMap). I am using the
GMAP demo and am getting this error:

Warning: [MapServer Error]: msDrawMap(): Unable to initialize image. in
C:\MapServerTools\GMAP_Sample\htdocs\gmap75.inc.php on line 576

Fatal error: Call to a member function on a non-object in
C:\MapServerTools\GMAP_Sample\htdocs\gmap75.inc.php on line 579


The code that is throwing this error is listed at the bottom of this
message. Specifically, it is complaining first about this:
$img2 = $gpoMap2->draw();

and then this:

$url2 = $img2->saveWebImage(MS_IMAGEMAP,1,1,0);

It does not seem to like my calling the draw() or saveWebImage functions
more than once as it works when these two lines are commented. Any idea?

Thanks,

Dave



CODE:

function GMapDrawMap()
{
    GLOBAL $gpoMap, $gpoMap2, $gbShowQueryResults;
    GLOBAL $gbIsHtmlMode;
    GLOBAL $gszCommand, $gszZoomBoxExt;
    GLOBAL $gAppletImgFmt, $gImagesFmt;

    if ($gbShowQueryResults)
    {
        $img = $gpoMap->drawQuery();
        //$img2 = $gpoMap2->drawQuery();
    }
    else
        $img = $gpoMap->draw();
        $img2 = $gpoMap2->draw();

    $url = $img->saveWebImage($gAppletImgFmt, 0, 0, -1);
    $url2 = $img2->saveWebImage(MS_IMAGEMAP,1,1,0);

....  more code......