google maps synopsis

7/29/2019 Google maps synopsis

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SIR M VISVESVARAYA INSTITUTE OF TECHNOLOGY

BANGALORE-562157

DEPARTMENT OF COMPUTER SCIENCE

ENGINEERING

Seminar

Google Maps API

Synopsis

Submitted by

1. SUBASH P 1MV09IS057

2.MANISH AGARWAL 1MV09IS023


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ABSTRACT:

This seminar describes Google Maps API. An application programming

interface (API) is a protocol intended to be used as an interface by software components to

communicate with each other. An API is a library that may include specification

for routines, data structures, object classes, and variables. Google Maps (formerly GoogleLocal) is a web mapping service application and technology provided by Google, that powers

many map-based services, including the Google Maps website, Google Ride Finder, Google

Transit, and maps embedded on third-party websites via the Google Maps API. It offers street

maps, a route planner for traveling by foot, car, bike (beta), or with public transportation and

a locator for urban businesses in numerous countries around the world. Google Maps satellite

images are not updated in real time, but rather they are several months or years old.

INTRODUCTION:

A number of new geospatial viewing tools from major players in the Internet industry haverecently appeared on the scene and are taking the geospatial world by storm. Google, Yahoo,

Microsoft, and Amazon have all released web-based mapping tools in the recent past, and

collectively these new players to the industry have raised the bar for Internetmapping. Although their functional capabilities dont provide anything we havent seen in

web offerings from traditional GIS vendors, their emergence has been significant in that they

have managed to capture a wider audience. Google, in particular, has emerged as the leader

of this pack with its recently released Google Maps product which provides a slick, highly

responsive visual interface built using AJAX technologies along with detailed street and

aerial imagery data, and an open API allowing customization of the map output including the

ability to add application specific data to the map.

Many of the barriers to entry into the world of web mapping have been removed by Google

Maps. To understand how this technology has the potential to change the way web mapping

is implemented you must understand the traditional approach to publishing dynamic maps ina web based environment. Traditional web mapping products have relied on a sophisticated

infrastructure of data, hardware, software, and human resources.

Data for a traditional web mapping application can be broken into two distinct categories:

base data and application specific data. Base data or background data usually includes the

geographic region covered by the application and often includes layers such as aerial imagery

and photos, streets, and organizational boundaries. Application specific data would include

geographic data layers specific to the application being developed. For instance, in a web

mapping application hosted by a city you might have data layers such as parcel and

subdivision boundaries, school locations, public office locations, and many other application

specific layers. Each of these data layers must be obtained loaded onto a server managed bythe organization, and updated periodically. With Google Maps you no longer have to worry


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about obtaining and managing your own base data. Aerial imagery and street data is included

with Google Maps thus removing the need to obtain and manage these large data

sets. However, you are still required to manage your application specific data in either XML

or database format.

In addition to the complex data requirements of traditional web mapping products you mustalso contend with hardware, software, and human resource issues. Hardware and software

must be purchased and effectively managed while human resources are necessary for

managing the software installations, administering the software, and programming the web

applications. Although these requirements are not completely removed through the

introduction of Google Maps, they are greatly reduced. Hardware is still needed to host the

application specific data and web sites, but the software requirements are essentially removed

from the equation. Google Maps is currently a free product and requires no installation or

management. However, because this product is a programmers toolkit or API you will either

need to have some programming expertise or know someone who does. Specifically you will

need skills in JavaScript and android, possibly another Internet programming language such

as PHP, ASP.NET, or ColdFusion..

TECHNICAL DESCRIPTION:

As mentioned in the introduction, Google Maps provides a highly responsive,

intuitive mapping interface with detailed street and aerial imagery data embedded. In

addition, map controls can be embedded in the product to give users full control over

map navigation and the display of street and imagery data. Additionally, users can

also perform map panning through the user of the arrow keys on a keyboard as well

as dragging the map via the mouse. These capabilities combine to provide a

compelling product, but the primary driver behind its rapid acceptance as an Internet

mapping viewer is the ability to customize the map to fit application specific

needs. For instance, a real estate agency might develop a web based application that

allows end user searching for residential properties the results of which could be

displayed on a Google Maps application. This ability to customize the map display

through the addition of application specific data is the true driver of its acceptance as

a geospatial viewing tool.

Getting a Google Maps Key

At this time, the Google Maps API is a free beta service. However, Google reserves the right

to put advertising on the map at any point in the future so keep this in mind as you begin to


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develop Google Maps applications. Your applications may also need frequent code changes

since this product is still in a beta format and subject to changes in the API.

Before you can get started developing Google Maps applications you will need to sign up for

an API key. When you sign up for an API key you must specify a web site URL that will be

used in your development. One problem frequently associated with Google Maps is that youmust acquire a unique key for each directory that will serve Google Maps. For instance, if

you intend to serve Google Maps fromhttp://localhost/wwwrootand

http://localhost/wwwroot/GMapsyou would need to generate separate keys for each

directory. Google Maps will generate a unique key code for the directory that you

specify. You must use this key code in each script that accesses the Google Maps API.

Google Maps Documentation

Google also provides documentation for using its product including full documentation of the

classes, methods, and events available for the Google Maps objects as well as code examples

to get you started. In addition, Google provides a blog and discussion group for additionalinformation on using the API.

Creating a Basic Google Map with ControlsWhen you sign up with Google Maps, an API key will be generated. Make sure you save this

key as you will need it for all Google Maps applications that you develop for the particularURL directory that was specified. In addition to the API key, Google will also generate an

example web page centered on the Palo Alto area in the vicinity of the Google Headquarters

You can start a new android project in eclipse and start the activity. Create a new Android

project called com.name. mapswithin Activity called ShowMapActivity. Changethe AndroidManifest.xml file to the following code. Add the following permissions to yourapplication
http://localhost/wwwroothttp://localhost/wwwroothttp://localhost/wwwroothttp://localhost/wwwroot/GMapshttp://localhost/wwwroot/GMapshttp://localhost/wwwroot/GMapshttp://localhost/wwwroot


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Get a valid API key for your application and enter this key in the mainactivity.xml located atres->layout

Now Debug and run the application using android emulator and we will see something like

this shown below a basic map:-

Even the Zoom controls and the latitude longitude and street view satellite views can easily

be implemented which will be shown in ppt.

CONCLUSION:

Successfully implemented Google Maps API. Also conducted various forms of its

applications. Also showed how it can easily be implemented. The implementation hence

gives an idea of how the Maps works and how it can be customized by the individual.


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REFERENCE:

Developers.google.com.

Learning android development.

Wikipedia.com

google maps synopsis

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