Skip to main content

Drive along - Cool coding

         This is something that will demonstrate to you the power of mapping! This is a Google Maps API v2 example, but just copy and paste the code in an html file and you will see something very cool! This will prove that mapping is real fun!

         Let's have a look at the code first. Copy this code in your html file. Don't worry about the length of the code and the post in general. Just execute the code and you will surely enjoy what you see!

<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>
Drive Along
</title>

<script src="http://maps.google.com/maps?file=api&amp;v=2&amp;sensor=false&amp;key=ABQIAAAAu3HXU_hLdVPTFGqLed_FCxT2yXp_ZAY8_ufC3CFXhHIE1NvwkxQbblEPYBGNoRsuuSU9aBfSq4VAZA" type="text/javascript">
</script>

<script src="http://econym.org.uk/gmap/epoly.js" type="text/javascript">
</script>

</head>

<body onunload="GUnload()">

<div id="controls">
<form onsubmit="start();return false" action="#">
Enter start and end addresses.<br />
<input type="text" size="80" maxlength="200" id="startpoint" value=" " />
<br />
<input type="text" size="80" maxlength="200" id="endpoint" value=" " />
<br />
<input type="submit" value="Start"  />
</form>
</div>

<div id="map" style="width: 700px; height: 500px">
</div>
<div id="step">&nbsp;
</div>
<div id="distance">Miles: 0.00
</div>

<script type="text/javascript">
if (GBrowserIsCompatible())
{
    var map = new GMap2(document.getElementById("map"));
          map.addControl(new GMapTypeControl());
          map.setCenter(new GLatLng(0,0),2);
          var dirn = new GDirections();
          var step = 5; // metres
          var tick = 100; // milliseconds
          var poly;
          var eol;
          var car = new GIcon();
        car.image="http://www.freeiconsweb.com/Freeicons/Car_icon/Dodge%20Viper%20SRT-10.png"
        car.iconSize=new GSize(28,28);
        car.iconAnchor=new GPoint(16,9);
          var marker;
          var k=0;
          var stepnum=0;
          var speed = "";  

          function animate(d)
    {
            if (d>eol)
        {
                  document.getElementById("step").innerHTML = "<b>Trip completed<\/b>";
                  document.getElementById("distance").innerHTML =  "Miles: "+(d/1609.344).toFixed(2);
                  return;
            }
            var p = poly.GetPointAtDistance(d);
            if (k++>=180/step)
        {
                  map.panTo(p);
                  k=0;
            }
            marker.setPoint(p);
            document.getElementById("distance").innerHTML =  "Miles: "+(d/1609.344).toFixed(2)+speed;
            if (stepnum+1 < dirn.getRoute(0).getNumSteps())
        {
                  if (dirn.getRoute(0).getStep(stepnum).getPolylineIndex() < poly.GetIndexAtDistance(d))
            {
                        stepnum++;
                        var steptext = dirn.getRoute(0).getStep(stepnum).getDescriptionHtml();
                        document.getElementById("step").innerHTML = "<b>Next:<\/b> "+steptext;
                        var stepdist = dirn.getRoute(0).getStep(stepnum-1).getDistance().meters;
                        var steptime = dirn.getRoute(0).getStep(stepnum-1).getDuration().seconds;
                        var stepspeed = ((stepdist/steptime) * 2.24).toFixed(0);
                        step = stepspeed/2.5;
                        speed = "<br>Current speed: " + stepspeed +" mph";
                  }
            }
        else
        {
                  if (dirn.getRoute(0).getStep(stepnum).getPolylineIndex() < poly.GetIndexAtDistance(d))
            {
                        document.getElementById("step").innerHTML = "<b>Next: Arrive at your destination<\/b>";
                  }
            }
            setTimeout("animate("+(d+step)+")", tick);
          }

    GEvent.addListener(dirn,"load", function()
    {
        document.getElementById("controls").style.display="none";
            poly=dirn.getPolyline();
            eol=poly.Distance();
            map.setCenter(poly.getVertex(0),17);
            map.addOverlay(new GMarker(poly.getVertex(0),G_START_ICON));
            map.addOverlay(new GMarker(poly.getVertex(poly.getVertexCount()-1),G_END_ICON));
            marker = new GMarker(poly.getVertex(0),{icon:car});
            map.addOverlay(marker);
            var steptext = dirn.getRoute(0).getStep(stepnum).getDescriptionHtml();
            document.getElementById("step").innerHTML = steptext;
            setTimeout("animate(0)",2000);  // Allow time for the initial map display
          });

          GEvent.addListener(dirn,"error", function()
    {
            alert("Location(s) not recognised. Code: "+dirn.getStatus().code);
          });

          function start()
    {
            var startpoint = document.getElementById("startpoint").value;
            var endpoint = document.getElementById("endpoint").value;
            dirn.loadFromWaypoints([startpoint,endpoint],{getPolyline:true,getSteps:true});
          }

}
</script>
</body>
</html>


         Please execute the above code and please drop in your comments about what you think about it. You can also drop me a mail about your feedbacks about this code or the blog in general!
Labels:

Comments

  1. OlivierDecember 1, 2010 at 8:20 AM

    Very nice code! Thank you for sharing it =)

    ReplyDelete
  2. Shreerang PatwardhanDecember 1, 2010 at 8:43 AM

    Thanx Olivier...:)

    ReplyDelete
  3. BharathiFebruary 17, 2011 at 12:41 AM

    Shreerang it is really a nice and cool post. Thanks , I am learning a lot from your blog.Keep posting..

    ReplyDelete
  4. Shreerang PatwardhanFebruary 17, 2011 at 8:18 PM

    Thanx Bharathi...:)

    ReplyDelete
  5. AnonymousJune 11, 2011 at 3:17 PM

    what is the format for writing the coordinates in the boxes, as its not working either by dms or dc formats

    ReplyDelete
    Replies
    1. Shreerang PatwardhanOctober 12, 2012 at 3:58 AM

      Co-ordinates should be in degree-decimal format or you can directly enter the addresses also.

      Delete

Post a Comment

Please leave your comments here...

Recommended for You

Playing with the markers and info window bubbles...

    In the last few posts, we have seen some marker examples and some information window examples. Now, lets do something interesting combining these two things. Just writing that "This is an info window" in the information bubble is not very interesting! And I know this...Have gone through the same phase!     So, today we will do something interesting! We will display the latitude- longitude co-ordinates of the point that the user clicks on the map! Doing this is not at all complex! Copy paste the following code and you will see for yourself a map coming to life!     The output of the above code looks as seen in the result section above! If you have any queries regarding the above code please comment on the blog post or feel free to contact me at my mail ID .
3 comments
Read more

Ground Truth - How Google Builds Maps

    Todays's article is cross posted from The Atlantic 's Tech section. The article was posted by Alexis Madrigal who is a senior editor at The Atlantic , where he oversees the Technology channel. So, thanks to The Atlantic and Alexis Madrigal, we will have an exclusive look inside Ground Truth , the secretive program to build the world's best accurate maps.     Behind every Google Map, there is a much more complex map that's the key to your queries but hidden from your view. The deep map contains the logic of places: their no-left-turns and freeway on-ramps, speed limits and traffic conditions. This is the data that you're drawing from when you ask Google to navigate you from point A to point B -- and last week, Google showed me the internal map and demonstrated how it was built. It's the first time the company has let anyone watch how the project it calls GT, or "Ground Truth," actually works.     Google opened up at a key moment in its evo...
6 comments
Read more

Google Street View Image API

    Street View is one of most used feature of the Google Maps and why not? You can actually see any part of the world as if you are visiting the place at that very moment. And now with the Google Street View Image API, you don't even need to carry a camera with you to the places you visit. You can take-in all the scenic beauty without even bothering about clicking a single picture. You can come back from your vacation and get a few images using the Google Street View Image API and show those images to your friends and relatives. Create an album of high definition images and go ahead and share it on Facebook for your friends to have a look.     Using the Google Street View Image API is very simple and anybody can make use of it without any programming knowledge required. I will walk you through the entire process of effectively using the Google Street View Image API. So if you are set, let's go on an amazing ride across the globe with the Google Street Views. ...
1 comment
Read more

The Bicycling Layer...

    Recreational cyclists and bike commuters alike can plot cycle-friendly routes, find trails, and avoid snarling traffic with Google Map's Bicycle layer. Map's bike-friendly, green-toned map layer is very eye-pleasing. The Google Maps API allows you to add bicycle information to your maps using the BicyclingLayer object.     The BicyclingLayer renders a layer of bike paths, suggested bike routes and other overlays specific to bicycling usage on top of the given map. Additionally, the layer alters the style of the base map itself to emphasize streets supporting bicycle routes and de-emphasize streets inappropriate for bicycles.     Let us have a look at the following example. The code has a map which is centered at Pune, India. There are very few cycle tracks in Pune and so you will see just a few dark green lines on the map. But if you would change the latitude-longitude values in the code and center the map at USA, then you will see a...
Post a Comment
Read more

Difference between word-break: break-all versus word-wrap: break-word

    The 2 CSS properties  word-break: break-all  and  word-wrap: break-word  appear to work in the same way or generate the same output, but there is a slight difference between the 2 and we will be discussing these differences today.     Take a look at the example above. The difference is quite evident, however I will try to explain it further. word-break: break-all Irrespective of whether it’s a continuous word or many words, break-all breaks them up at the edge of the width limit even within the characters of the same word word-wrap: break-word This will wrap long words onto the next line. break-word adjusts different words so that they do not break in the middle.     So if you have many fixed-size spans which get content dynamically, you might just prefer using  word-wrap: break-word , as that way only the continuous words are broken in between, and in case it’s a sentence comprising many words, the spa...
Post a Comment
Read more