### Setting up a Sandbox for Google Polymer

In the last article, we got introduced to Google Polymer which implements Google's Material Design for the web. Google Polymer is based on the concept of Web Components and provides users with 2 types of components that can be readily utilized - the Polymer Core Elements and the Paper Elements.

Polymer's core elements are a set of visual and non-visual utility elements.They include elements for working with the layout, user input, selection and scaffolding apps.

Polymer's paper elements collection implements material design for the web. They are a set of highly visual, highly interactive elements that includes things like controls, layout, hero transitions and scrolling effects.

We will be taking a look at the implementation of the Paper Elements in the next few posts, but before that we need to set up a sandbox to try out Google Polymer on our local systems. Follow the steps below and you can successfully set up your Google Polymer sandbox.
2. When you download a component or components (we are downloading the entire components set for development) as a zip file, you get all of the dependencies bundled into a single archive. You need not install any additional tools.
3. Extract the zip and add the folder to your local web servers home/htdocs folder.
4. That's all that you have to do get Google Polymer components and set it up on your local system.
You need to set the paths of the platform js file, the Roboto font and paper-elements html in the head section. Refer to the code below to get an idea.

Do not worry about the code above as of now. We will take a look at it in detail from the next post onward, where we take a look at each Paper Element in detail. Stay tuned for the fun!

### Geodesic Polyline

Today we will have a look at a very interesting polyline example - "The geodesic polyline". Now the first question that will pop is "What is geodesic?". Mathematically, geodesic means the shortest line between two points on a mathematically defined surface, as a straight line on a plain or an arc of a great circle or sphere.

The next question after reading the above definition is clearly, "Why do we need geodesic polylines?" and that would be followed up with "What is this Great Circle?". We will discuss this first, before we move on to the actual example today. The example is very very similar to the normal polyline example, with just a small change.

Having said so, I will now try to explain why we need a geodesic polyline? The shortest distance between two locations on the earth is rarely a straight line as the earth is roughly spherical in nature. So any two points on the earth, even if they are very close lie on a curve and not …

### Two maps on the same page - Side-by-side

How good I am feeling to post a code example after such a long time! It's been all "news" over the past so many posts! Well now that I am finally doing a code example, I am posting a very highly requested code sample. Placing two Google Maps on the same page (Now that's simple you would say!), but side by side. Now this is the thing that most people struggle with. Well, implementing the second part is also very simple, as you will see in today's code.

Let's see the code. Here it is!

The output of the above code will be as seen in the result section above.

As most of you will realize, there are two maps, one centered at "Pune" and other at "Noida". Why I chose these two locations? Well, just like that!...The main issue of concern is how the maps appeared side-by-side and not one below the other as would be normal behavior of two "div" elements used in the same page. Now here is the trick! Check out the the first

### Where does Google get it's live traffic data from?

Referring to a post that I wrote earlier, Google’s - Live traffic Layer, ever wondered how Google collected this data? I was wondering the other day, how Google received live data to display it on their maps as a layer! I looked up the web and found something very interesting and am sharing the same with you all.As we all know, the traffic layer is available most accurately in several states in USA. Most major metro areas in the US have sensors embedded in their highways. These sensors track real time traffic data. Easy to miss at high speeds (hopefully anyway, traffic permitting), more commonly noticed may be the similar sensors that often exist at many busy intersections that help the traffic lights most efficiently let the most amount of people through. The information from these tracking sensors is reported back to the Department of Transportation (DOT). The DOT uses this data to update some of the digital signs that report traffic conditions in many metro areas. They also…

### Four maps on the same page - Playing with events

In today's example we will see how to add 4 maps on the same web page and then play a bit around with some events in Google Maps API. Lets have a look at the code. All that you have to do to get the code working is copy the code in a text file and save it with .html extension. Open this html file in your browser and you will see the four maps in action!

Adding the four maps on a webpage should not be a challenge anymore, and all the more after the example Two Google Maps - Side by side that I shared a few weeks back! All you need to pay attention is to the events. There are two events "drag" and "zoom_changed". As the event names suggest, when you will drag or zoom the first map (upper left map), the remaining three maps will also zoom and pan accordingly! Try it out and leave a comment of what you think of it! You can also drop your queries or doubts about the same here!

The output of the above code appears as seen in the results section above! Ho…

### 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.