[OpenLayers-Users] Vector feature marker with bounds

[Supriya GHADAGE]

Hello,

I am beginner for openlayers. I wanted to draw rectangle as a marker with
openlayers vector feature.
But when I zoom in or out, rectangle changes its size. I have shared
following piece of code.

var box_extents1 = [[500, 00, 00, -600], [540, 00, 00, -500]]
var style = new OpenLayers.StyleMap({
        'default':OpenLayers.Util.applyDefaults({
        pointRadius: "${r}",
        label: "${l}",
        allOverlays: true,
        fillColor: "#008888",
        strokeColor: "#000000",
        strokeWidth: 0.5,
        fontSize: "12px",
        color: '#ffffff',
        width:"20px",
        height: 20
     }, OpenLayers.Feature.Vector.style["default"]
    ),
    'select':OpenLayers.Util.applyDefaults(
     {pointRadius: "${r}"},
     OpenLayers.Feature.Vector.style.select
    )
    });

var boxes  = new OpenLayers.Layer.Vector( "Box Markers" ,{
        styleMap: style
    });

for (var i = 0; i < box_extents.length; i++) {
        ext = box_extents[i];
        bounds = OpenLayers.Bounds.fromArray(ext);
        box = new OpenLayers.Feature.Vector(bounds.toGeometry(),
{l:1,r:10});
        boxes.addFeatures(box);
}


map.addLayer(boxes);


Any help is appreciated.
Thank you
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