[OpenLayers-Users] Gauss-Boaga track shifted to North!

[Arnd Wippermann]

if you display your track on google maps (add the url of your kmlfile in the
search), it's at the same place.
 
So if that is the wrong place, then the coordinates of the track are
misplaced.
 
Arnd

  _____  

Von: openlayers-users-bounces at lists.osgeo.org
[mailto:openlayers-users-bounces at lists.osgeo.org] Im Auftrag von Riggi
Valerio
Gesendet: Montag, 12. November 2012 10:10
An: openlayers-users at lists.osgeo.org
Betreff: [OpenLayers-Users] Gauss-Boaga track shifted to North!


Hi, I'm trying to display a KML track from WGS84 to Gauss-Boaga using the
proj4js library but the track result shifted like 500 meters north...what is
wrong?

This is the page: http://www.intornoamessina.it/tracking/image-layer2.html

And this is the code:

<style>
.olControlAttribution { bottom: 0px!important }
</style>

<script type="text/javascript" src="OpenLayers.js"></script>

<script type="text/javascript"
src="proj4js/lib/proj4js-compressed.js"></script>
<script type="text/javascript" src="proj4js/lib/projCode/tmerc.js"></script>
<script type="text/javascript" src="proj4js/lib/projCode/merc.js"></script>
<script type="text/javascript" src="proj4js/lib/defs/EPSG3004.js"></script>
<script type="text/javascript"
src="proj4js/lib/defs/EPSG900913.js"></script>

<script type="text/javascript">
    Proj4js.libPath = "./proj4js/lib/";
</script>


<script type="text/javascript">

/* area of interest
EPSG:3004
GEOMETRYCOLLECTION(POLYGON((2556348.9846319 4227924.438,2563754.843
4227924.438,2563754.843 4233595.0653626,2556348.9846319
4233595.0653626,2556348.9846319 4227924.438)))

EPSG:4326
GEOMETRYCOLLECTION(POLYGON((15.415108753542293
38.197099410930804,15.499681620107433 38.19676993127058,15.5000312968338
38.24787310414907,15.415399250825338 38.2482031851047,15.415108753542293
38.197099410930804)))
*/

var mercator = new OpenLayers.Projection("EPSG:3004"); <!-- Gauss-Boaga -->
var geographic = new OpenLayers.Projection("EPSG:4326"); <!-- WGS84 -->

var map;

function init()
{

    var esriSatellite = new OpenLayers.Layer.ArcGIS93Rest("ESRI Satellite",
"http://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer
/export?f=image"
<http://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer
/export?f=image> ,
        {   "format" :'png24',
            "layers" :'show:0'
        },
        {   "isBaseLayer":true,
            "opacity":1,
            "attribution": "Provided by <a
href=\"http://www.esri.com/software/arcgis/arcgisonline/index.html\"
<http://www.esri.com/software/arcgis/arcgisonline/index.html\>
target=\"_new\">ESRI</a>",
            "visibility":true
        });

    map = new OpenLayers.Map({
        div: "map",
        projection: mercator,
        maxExtent: new OpenLayers.Bounds(2000000,3900000,3000000,4500000),
        maxScale: 3145, //0.84686783985005,
        layers: [esriSatellite, new OpenLayers.Layer.PointTrack("Tracks", {
                projection: geographic,
                strategies: [new OpenLayers.Strategy.Fixed()],
                protocol: new OpenLayers.Protocol.HTTP({
                    url: "-track.kml",
                    format: new OpenLayers.Format.KML()
                }),
                styleMap: new OpenLayers.StyleMap({fillColor: "darkred",
strokeColor: "red", strokeWidth: 4, strokeOpacity: 0.5, pointRadius: 5}),
                //next two lines have no effect?!
                //dataFrom: OpenLayers.Layer.PointTrack.TARGET_NODE,
                //styleFrom: OpenLayers.Layer.PointTrack.TARGET_NODE,
                eventListeners: {
                    "beforefeaturesadded": function(e) {
                        // group the tracks by fid and create one track for
                        // every fid
                        var fid, points = [], feature;
                        for (var i=0, len=e.features.length; i<len; i++) {
                            feature = e.features[i];
                            if ((fid && feature.fid !== fid) || i === len-1)
{
                                this.addNodes(points, {silent: true});
                                points = [];
                            } else {
                                points.push(feature);
                            }
                            fid = feature.fid;
                        }
                        return false;
                    }
                }
            })
        ],
        center: new
OpenLayers.LonLat(15.4385912418365,38.2424157857895).transform(geographic,
mercator),
        zoom: 13
    });

    map.addControl(new OpenLayers.Control.Attribution());
    map.addControl(new OpenLayers.Control.LayerSwitcher());
}
</script>

</head>
<body onload="init();">

<p style="font-size:20px;font-family:Arial;">OpenLayers.Layer.PointTrack,
Gauss-Boaga-Projection and proj4js</p>
<div id="map" style="width:768px;height:512px;border:1px solid blue;"></div>
<div>
<a href="http://trac.osgeo.org/proj4js/" <http://trac.osgeo.org/proj4js/>
>proj4js</a> <a href="http://trac.osgeo.org/proj4js/"
<http://trac.osgeo.org/proj4js/>  target="_new"><img
src="http://gis.ibbeck.de/ginfo/apps/OLExamples/index/nw.gif"
<http://gis.ibbeck.de/ginfo/apps/OLExamples/index/nw.gif>  title="new
window" border="0"></a>
<a href="http://trac.osgeo.org/openlayers/wiki/Documentation/Dev/proj4js"
<http://trac.osgeo.org/openlayers/wiki/Documentation/Dev/proj4js>
>OpenLayers and proj4js</a> <a
href="http://trac.osgeo.org/openlayers/wiki/Documentation/Dev/proj4js"
<http://trac.osgeo.org/openlayers/wiki/Documentation/Dev/proj4js>
target="_new"><img
src="http://gis.ibbeck.de/ginfo/apps/OLExamples/index/nw.gif"
<http://gis.ibbeck.de/ginfo/apps/OLExamples/index/nw.gif>  title="new
window" border="0"></a>
</div>
</body>

Thanks
Valerio

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