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POopenstreetmap geolocation
 

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    <p>I'm newbie, I'm reading in internet the possibilities of openstreetmap, and also I read about openlayers...What I need, for begin, is obtain the location and create the corresponding map...I found a good example with openlayers, this is the code:</p> <pre><code>&lt;html&gt; &lt;head&gt; &lt;title&gt;HTML5 geolocation with Openstreetmap and OpenLayers&lt;/title&gt; &lt;style type="text/css"&gt; html, body, #basicMap { width: 240; height: 320; margin: 10; } &lt;/style&gt; &lt;script src="http://openlayers.org/api/OpenLayers.js"&gt;&lt;/script&gt; &lt;script&gt; function init() { map = new OpenLayers.Map("basicMap"); var mapnik = new OpenLayers.Layer.OSM(); map.addLayer(mapnik); navigator.geolocation.getCurrentPosition(function(position) { document.getElementById('anzeige').innerHTML="Latitude: " + position.coords.latitude + " Longitude: " + position.coords.longitude + "&lt;p&gt;"; var lonLat = new OpenLayers.LonLat(position.coords.longitude, position.coords.latitude) .transform( new OpenLayers.Projection("EPSG:4326"), //transform from WGS 1984 map.getProjectionObject() //to Spherical Mercator Projection ); markers.addMarker(new OpenLayers.Marker(lonLat)); map.setCenter(lonLat, 14 // Zoom level ); }); //map = new OpenLayers.Map("basicMap"); //var mapnik = new OpenLayers.Layer.OSM(); //map.addLayer(mapnik); map.setCenter(new OpenLayers.LonLat(3,3) // Center of the map .transform( new OpenLayers.Projection("EPSG:4326"), // transform from WGS 1984 new OpenLayers.Projection("EPSG:900913") // to Spherical Mercator Projection ), 15 // Zoom level ); var markers = new OpenLayers.Layer.Markers( "Markers" ); map.addLayer(markers); } &lt;/script&gt; &lt;/head&gt; &lt;body onload="init();"&gt; &lt;center&gt; HTML5 geolocation: &lt;br&gt; &lt;div id="basicMap"&gt;&lt;/div&gt; &lt;br&gt;HTML5 geolocation&lt;br&gt; &lt;br&gt;with Openstreetmap and OpenLayers&lt;br&gt; For Android Froyo,iPhone,iPAD,iPod &lt;br&gt; Your position estimated by browser geolocation API:&lt;p&gt; &lt;div id="anzeige"&gt;(will be displayed here)&lt;p&gt;&lt;/div&gt; &lt;a href="http://www.dr-bischoff.de"&gt;Andreas Bischoff&lt;/a&gt; &lt;br&gt;(view source to see how it works &lt;/center&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>You can see a live example here: <a href="http://www.pediaphon.org/~bischoff/location_based_services/" rel="nofollow noreferrer">http://www.pediaphon.org/~bischoff/location_based_services/</a> Next step, I need draw a scretch line which displays the rute followed. Here is a live example of drawing lines (pressing shift + clicking on mouse): <a href="http://openlayers.org/dev/examples/draw-feature.html" rel="nofollow noreferrer">http://openlayers.org/dev/examples/draw-feature.html</a></p> <p>But I'm new and I'm lost in how call api of openlayers in order to draw line from origin to destination...any help is welcome</p> <p>Best regards. </p> <p><strong>EDIT:</strong> I just copied this peace of code ( <a href="https://stackoverflow.com/questions/2735944/drawing-a-path-with-a-line-in-openlayers-using-javascript">Drawing a path with a line in OpenLayers using JavaScript</a> ) just before the tag, but I don't see the line drawn:</p> <pre><code> var lineLayer = new OpenLayers.Layer.Vector("Line Layer"); map.addLayer(lineLayer); map.addControl(new OpenLayers.Control.DrawFeature(lineLayer, OpenLayers.Handler.Path)); var points = new Array( /*I put these coords of my city*/ new OpenLayers.Geometry.Point(-3.7904085, 37.76225609999999 ), new OpenLayers.Geometry.Point(-4.7904085, 39.76225609999999 ) ); var line = new OpenLayers.Geometry.LineString(points); var style = { strokeColor: '#0000ff', strokeOpacity: 0.5, strokeWidth: 5 }; var lineFeature = new OpenLayers.Feature.Vector(line, null, style); lineLayer.addFeatures([lineFeature]); </code></pre>
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    1. USDaniel Garcia Sanchez
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