Networking Academy: Google Earth

Activity 1.1.1: Using Google

Earth™ to View the World

Learning Objectives

Upon completion of this activity, you will be able to:

•

Explain the purpose of Google Earth.

•

Explain the different versions of Google Earth.

•

Explain the hardware and software requirements

needed to use Google Earth (free edition).

•

Experiment with Google Earth features such as Help | Tutorial.

•

Experiment with Google Earth to explore continents, countries, and places of interest.

Background

Google Earth is a popular application that executes on

the desktop of most operat

ing systems. It requires

a broadband connection to the Internet and displays Earth as a manipulated 2D, or 3D image. The

popular world news channel, CNN, regularly uses Go

ogle Earth to emphasize where a news story has

occurred.

At the time of writing this activity, there are three ve

rsions of Google Earth. The version that fits most

needs is Google's free version, Google Earth. A

Google Earth Plus version includes GPS support, a

spreadsheet importer, and other support features. T

he Google Earth Pro version is for professional and

commercial use. The URL

http://earth.google.com/product_comparison.html

contains a description of the

versions. Use this link to answer the following questions:

Which versions support Tilt and 3D rotation? Semua Versi

Which Google Earth version supports the highest resolution? Google Earth Pro, 4800 pixels

To use Google Earth, version 4, minimum computer hardware requirements must be met:

Operating System

Microsoft

Windows 2000 or Windows XP

CPU

Pentium 3 with 500 MHz

System Memory (RAM)

128 MB

Hard Disk

400 MB of free space

Network Speed

128 kbps

Graphics Card

3D-capable with 16 MB of VRAM

Screen

1024x768 pixels, 16-bit High Color screen

Scenario

This activity is to be performed on a computer t

hat has Internet access and on which you can install

software.

Estimated completion time, depending on network speed, is 30 minutes.

ment is Cisco Public Information. Page

1 of 5

CCNA Exploration

Network Fundamentals:

Living in a Network-Centric World

Activity 1.

1.1: Using Google Earth™ to View the World

Task 1: Install Google Earth.

If Google Earth is not installed on the computer, t

he free application can be downloaded directly from

http://earth.google.com/download-earth.html

. Follow the installation instructions, and the Google Earth

download should start automatically. Remember, you

may have to disable any popup blockers on your

browser.

Figure 1. Google Earth Opening Screen

Task 2: Run Google Earth.

Step 1

: Refer to Figure 1, the opening screen. The Menu bar is located in the upper left corner of the

screen. On the

Help

menu, choose

User Guide

to launch a default web browser and bring up the Google

Earth User’s Guide.

http://earth.google.com/userguide/v4/

. Take a few minutes to browse the User’s

Guide. Before leaving the User’s Guide web site, answer the following questions:

List the three ways to move the image.

Letak, mouse, kontrol navigasi.

__________________________________________

Which mouse control will zoom in or zoom out?

Tombol kanan mouse atau scroll wheel.

__________________________________________

What is the purpose of the left mouse button?

Tombol kiri mouse memutar gambar.

__________________________________________

Task 3: Navigatie the Google Earth Interface.

Step 1: Use the Overview Map feature.

On the

View

menu, choose

Overview Map

. This handy feature provides a relative global position of the

magnified image.

ment is Cisco Public Information. Page

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CCNA Exploration

Network Fundamentals:

Living in a Network-Centric World

Activity 1.

1.1: Using Google Earth™ to View the World

Step 2: Review the navigation controls.

Navigation controls are located in the upper right quadrant and control the image magnification and

position. The mouse pointer must be moved close to t

he controls, otherwise only a compass is displayed.

Refer to Figure 2 for a descript

ion of the navigation controls.

Figure 2. Google Earth Screen Navigation Tools

Step 3: Use the Sightseeing feature.

On the left navigation bar, experiment with the

Places > Sightseeing

folder. Expand Sightseeing, choose

a location that you would like to see, and double-cli

ck that location. The image will take you to that site.

When the location has been reached, an image streaming indicator reports when the image resolution is

complete.

Step 4: Experiment with the Search > Fly To folder.

Enter 95134, a U.S. Zip Code.

What U.S. State and City are displayed?

San Jose, California (Cisco Systems).

________________

What if you would like to "Fly To" London,

UK? What data would you need to enter?

____________________________________________________________________________

Step 5: Use the Fly To feature.

Some locations have better resolution than others, and some location images are older than others. For

example, one user commented that he found his

home, but the new home next door had not yet been

built. Try to find your home using the

Search > Fly To

folder.

Is the resolution for your home the same quality

as the Sightseeing location in Step 3?

_______________

If the resolution for your neighborhood is sufficient, browse the surrounding area to see if you can

determine approximately how old the image is.

ment is Cisco Public Information. Page

3 of 5

CCNA Exploration

Network Fundamentals:

Living in a Network-Centric World

Activity 1.

1.1: Using Google Earth™ to View the World

Figure 3. World Map with Latitude and Longitude Lines

Step 6: View geographic coordinates.

Geographic coordinates are displayed in the lower

left quadrant of the image. The first number is called

the latitude, and is the angle between a point and t

he equator. For example, the equator is an imaginary

line dividing the globe into the Northern or Southern Hemisphere. The equator has a 0

latitude. The

second number is called the longitude, and is the angle

east or west of an arbitrary earth point. The Royal

Observatory, United Kingdom, is the internatio

nal zero-longitude point. The combined longitude and

latitude is called the common graticule. T

he coordinate measurements are in degrees

minutes’,

seconds, and tenths". For latitude, the reference is

North (N) or South (S) of

the equator. For longitude,

the reference is East (E) or West (W) of the Royal Observatory. Refer to Figure 3. For a layman’s

definition of geographic coordinates, go to URL

http://en.wikipedia.org/wiki/Geographic_coordinate_system

. On the

View

menu, choose

Grid

to display

Google Earth Gridlines.

Using the pointer and coordinates shown in the lower

left quadrant of the image, what are the coordinates

of your home?

-0°31'14"N 117°7'53"E

____________________________

Task 4: Reflection

Google Earth can bring the world into the home or office. While enjoying the images, consider what digital

communication resources were us

ed. For example, satellite comm

unication with an earth station

transmitted the image of your home to a ground location. Some type of database was used to store the

image. A Local Area Network (LAN) sent your im

age request across the Internet, probably through

several Wide Area Networks (WANs) and then to another

LAN with a computer that returned the image to

you. The delay in retrieving the image may have been short or long, depending on the slowest speed of

all network connections in the path between t

he database repository and your computer.

Could the image be displayed faster if data compression techniques were used?

Consider network security. Could someone eavesdrop on your network connection?

ment is Cisco Public Information. Page

4 of 5

CCNA Exploration

Network Fundamentals:

Living in a Network-Centric World

Activity 1.

1.1: Using Google Earth™ to View the World

Task 5: Challenge

Google Earth displays image coordinates in the lo

wer left quadrant of the image. Use the following URL

to learn about different coordinate systems:

http://www.colorado.edu/geography/gcr

aft/notes/coordsys/coordsys.html

. Wikipedia contains a useful

definition of common geographical terms.

Use the geographic coordinate system to describe yo

ur home with as much accuracy and detail as

possible.

Task 6: Clean Up

You may be required to remove Google Earth from

the computer. If so, perform these steps:

1. Click

Start

Settings

Control Panel

2. Double-click

Add or Remove Programs

3. Locate and click

Google Earth

4. Click

Remove

and follow the prompts.

Additional removal information is available from URL

http://earth.google.com/support/bin/topic.py?topic=17087

Unless instructed otherwise, turn off the computer.

Networking Academy

Tuesday, March 11, 2014

Google Earth

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