function checkedRadioBtn(url, size, extProj){
var resultExt,  r2 = 0, ext = 1;
   
    if(extProj[0] < 0){
        ext = extProj[0] * (-1);
        //Dreisatz
        resultExt = (((extProj[2] + ext)*size[1])/size[0])+extProj[1];
    }else{
        resultExt = (((extProj[2] - extProj[0])*size[1]) / size[0])-extProj[1];
    }
    resultExt.toFixed(2);
 
    var newSizeProjection = new ol.proj.Projection({
        code: 'metrics',
        units: 'm',
        extent: [extProj[0], extProj[1], extProj[2], resultExt]  //Xmin, Ymin, Xmax, Ymax
    });
//remove
        map.removeLayer(baseLayer);
 
        //get layers and remove marker
        var allLayers = map.getLayers().getArray()[0];
        map.removeLayer(allLayers);
 
        for(var i = 0; i<icons.length; i++){
            map.removeLayer(icons[i]);  
        }
 
        var extent = newSizeProjection.getExtent();
        var center = ol.extent.getCenter(extent);
 
        var newV = new ol.View2D({
            projection: newSizeProjection,
            center: center,
            zoom: 2
        });
 
        map.updateSize();
        map.addLayer(newL);
        map.getView().getView2D().setProjection(newSizeProjection);
        map.getView().getView2D().setCenter(center);
        $("#extentResult").text('Extent: ' +newSizeProjection.getExtent()[0].toFixed(2)+", "+newSizeProjection.getExtent()[1].toFixed(2)+", "+newSizeProjection.getExtent()[2].toFixed(2)+", "+newSizeProjection.getExtent()[3].toFixed(2));