add an example to display GPX tracks

examples/gpx-trkpt.js

@@ -0,0 +1,37 @@
+goog.require('ol.Map');
+goog.require('ol.RendererHint');
+goog.require('ol.View2D');
+goog.require('ol.layer.Tile');
+goog.require('ol.layer.Vector');
+goog.require('ol.parser.GPX');
+goog.require('ol.source.OSM');
+goog.require('ol.source.Vector');
+
+var raster = new ol.layer.Tile({
+  source: new ol.source.OSM()
+});
+
+var vector = new ol.layer.Vector({
+  source: new ol.source.Vector({
+    parser: new ol.parser.GPX(),
+    url: 'data/gpx/gpx4j.xml'
+  }),
+  style: new ol.style.Style({
+    symbolizers: [
+      new ol.style.Stroke({
+        color: 'red',
+        opacity: 1
+      })
+    ]
+  })
+});
+
+var map = new ol.Map({
+  layers: [raster, vector],
+  renderer: ol.RendererHint.CANVAS,
+  target: 'map',
+  view: new ol.View2D({
+    center: ol.proj.transform([-0.425692, 39.114318], 'EPSG:4326', 'EPSG:3857'),
+    zoom: 19
+  })
+});