[OpenLayers-Users] Simple Point display in OpenLayers

[Arnd Wippermann]

You have to use a points array as argument for MultiPoints 

And your coordinates not in the view.

var lonLat = new
OpenLayers.LonLat(lon=72.855202114476,lat=19.127904557572).transform(
    new OpenLayers.Projection("EPSG:4326"),
    new OpenLayers.Projection("EPSG:900913")
    //map.getProjectionObject()
);

var points = [];
// Make Point
points.push(new OpenLayers.Geometry.Point(lonLat.lon, lonLat.lat));
var pointsGeometry = new OpenLayers.Geometry.MultiPoint(points);
...

Regards
Arnd
 

-----Ursprüngliche Nachricht-----
Von: openlayers-users-bounces at lists.osgeo.org
[mailto:openlayers-users-bounces at lists.osgeo.org] Im Auftrag von Subhodip
Biswas
Gesendet: Samstag, 26. Mai 2012 21:40
An: openlayers-users at lists.osgeo.org
Betreff: [OpenLayers-Users] Simple Point display in OpenLayers

Hi All,

I was trying to display a point on a OSM map in openlayers. I wrote few code
in Backbone.js. Even though I can get the map displayed perfectly, I somehow
cannot get the point displayed up in my map.

Here is the code:
 initMap: function() {
            // Initialize Basic Openlayers;
            var center = new OpenLayers.LonLat(8110203.9998955,
2170000.4068373);


            map = new OpenLayers.Map(this.el, {
                projection: new OpenLayers.Projection("EPSG:900913"),
                displayProjection: new OpenLayers.Projection("EPSG:4326")
            });
            //alert(this.el);
            var layers = [];
	    var lonLat = new OpenLayers.LonLat(76.289063, 23.885838);
	    var coordinates = new Array();
            layers[0] = new OpenLayers.Layer.OSM();


            // Style Point
            var style_red = OpenLayers.Util.extend({},
OpenLayers.Feature.Vector.style['default']);
            style_red.strokeColor = "red";
            style_red.fillColor = "red";

            // Make Point
            coordinates.push(new OpenLayers.Geometry.Point(lonLat.transform(
            new OpenLayers.Projection("EPSG:4326"),
		map.getProjectionObject()
	    )));
            var pointsGeometry = new
OpenLayers.Geometry.MultiPoint(coordinates);
            var pointFeature = new
OpenLayers.Feature.Vector(pointsGeometry, null, style_red);

            // Layer
            layers[1] = new OpenLayers.Layer.Vector("Points Layer");
            layers[1].addFeatures(pointFeature);
            //map.addLayer(pointsLayer);
            map.addLayers(layers);
            map.addControl(new OpenLayers.Control.LayerSwitcher());

            map.setCenter(center, 12);

        }
    });

I guess I am missing something simple here, any help/pointer or links would
be much appreciated.

-------------
Regards
Subhodip Biswas


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