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I'm trying to render WMS MapServer data on top of Google Maps using the OpenLayers JS library. My problem arises when I try to render the data as a series of points throughout the New York City area. On my local machine I get a broken image, but on my live server I get no broken PNG data or anything at all.

Any help would be very much appreciated.

You can also check out the live site at:

OpenLayer JavaScript code below:

var map;
var mapBounds      = new OpenLayers.Bounds(-8266100.0, 4938263.9, -8204223.4, 4999860.8);
var movementBounds = new OpenLayers.Bounds(-8266100.0, 4938263.9, -8204223.4, 5030000.0);
var aliasproj = new OpenLayers.Projection("EPSG:4326");
var options = {
        projection: "EPSG:4326",
        units: "ft",
        maxResolution: 'auto',
        restrictedExtent: movementBounds,
        maxExtent: mapBounds

function init(){

    map = new OpenLayers.Map('map', options);

    var base_layer = new OpenLayers.Layer.Google(
                    'Google Streets', // the default
                    {   numZoomLevels: 20, 
                        projection: aliasproj, 
                        isBaseLayer: true

    //change 'Oviedo12' to your login name
    var wms_layer = new OpenLayers.Layer.WMS("WMS Overlay",
        {layers: 'L_line', transparent: true, format: 'image/png', reqType:'wms'},
        {isBaseLayer: false, visibility: true}

    map.addLayers([base_layer, wms_layer])
    //map.setCenter(new OpenLayers.LonLat(lon, lat), zoom);
    map.addControl(new OpenLayers.Control.MousePosition({position: new OpenLayers.Pixel(0,0)}));

Map file code:

  STATUS         ON
  IMAGECOLOR     255 255 255  


      NAME 'circle'
      POINTS 1 1 END

    NAME png
    MIMETYPE "image/png"
    EXTENSION "png"

    NAME jpeg
    MIMETYPE "image/jpeg"
    EXTENSION "jpg"

END # All map files must come to an end just as all other things must come to...

PHP code for dynamic render:


if (!extension_loaded("MapScript")) dl("");

$request = ms_newowsrequestobj();

foreach ($_GET as $k=>$v) {
     $request->setParameter($k, $v);

$oMap = ms_newMapobj("../maps/");

$new_layer =ms_newlayerobj($oMap);
$new_layer->set("type", MS_LAYER_POINT);
$new_layer->set("dump", 1);
$new_layer->set("status", 1);
$new_class = ms_newClassObj($new_layer);
$new_style = ms_newStyleObj($new_class);
$new_style-> color->setRGB(0, 0,255);
$new_style->set("symbolname", "circle");
$new_style->set("size", 5);

$new_layer->set("connection","stuff to connect to db");
$data="the_geom from (select the_geom from station2 where lines = 'Canarsie') as foo using unique the_geom using SRID=4326";
echo ;
$new_layer->set("data",$data) ;

$contenttype = ms_iostripstdoutbuffercontenttype();
if ($contenttype == 'image/png')
   header('Content-type: image/png');
    $buffer = ms_iogetstdoutbufferstring();
    echo $buffer;
share|improve this question
It looks like MapServer can't open your map file. Warning: [MapServer Error]: msLoadMap(): First token must be MAP, this doesn't look like a mapfile. in /home/Oviedo12/public_html/final/subway crowding/mapscripts/dynamicwms.php on line 13 Warning: Failed to open map file ../maps/ in /home/Oviedo12/public_html/final/subway crowding/mapscripts/dynamicwms.php on line 13 Fatal error: Object expected as argument. in /home/Oviedo12/public_html/final/subway crowding/mapscripts/dynamicwms.php on line 16 I would check permissions on that file. – DavidF Dec 18 '12 at 21:24
I fixed that error and placed the correct mapfile file. – user13653 Dec 18 '12 at 21:53
Your link to the live site doesn't work. – Fezter Dec 18 '12 at 22:38

Check your ms_iostripstdoutbuffercontenttype() function, I think it's setting your $contenttype as text when it should be setting it as PNG. Also, Chrome is complaining that this link is 404'ing:

edit: Also as Dave points out in the comment, set your map to a static path instead of a dynamic one and see if that helps.

edit x2: Change your $oMap in your php code from this:


to this:


share|improve this answer
I finished fixing that error, I'm still getting a Warning: [MapServer Error]: error.Warning: [MapServer Error]: msLoadMap(): (/home/Oviedo12/public_html/final/subway crowding/maps/maps/ in /home/Oviedo12/public_html/final/subway crowding/mapscripts/dynamicwms.php on line 13 – user13653 Dec 18 '12 at 21:28
Yeah, that's a bad link to your file, you've got one too many 'maps' in the path. – Mintx Dec 18 '12 at 21:32
I saw that error a while ago, but to my knowledge I have no idea what it mean. I don't use any file of that name. I think it has something to so with twitter bootstrap, as that's what I'm using for my frontend. – user13653 Dec 18 '12 at 21:33
See edit x2 in my answer above. – Mintx Dec 18 '12 at 21:36
After the x2 edit I still get the same error: Warning: [MapServer Error]: msLoadMap(): (…) in /home/Oviedo12/public_html/final/subway crowding/mapscripts/dynamicwms.php on line 13................Also, if i change it back to ms_newMapobj("../maps/"); is "kinda works". – user13653 Dec 18 '12 at 21:43

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