Set imgSize for SVG icons to increase OpenLayers compatibility

 map.js

@@ -276,11 +276,12 @@
        fill = '#922';
    }
    
    var image = '<svg xmlns="http://www.w3.org/2000/svg" height="30" width="20"><polygon points="10,0 20,23 0,23" style="fill:'+fill+';stroke:'+color_type+';stroke-width:3" /></svg>';
    var image = '<svg xmlns="http://www.w3.org/2000/svg" width="20" height="30"><polygon points="10,0 20,23 0,23" style="fill:'+fill+';stroke:'+color_type+';stroke-width:3"/></svg>';
    
    vehicle.setStyle(new ol.style.Style({
        image: new ol.style.Icon({
            src: 'data:image/svg+xml;base64,' + btoa(image),
            imgSize: [20,30],
            rotation: Math.PI * parseFloat(vehicle.get('heading') ? vehicle.get('heading') : 0) / 180.0,
        }),
        text: new ol.style.Text({