Tracy Nelson Maurer - Using Road Maps and GPS

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Using

Road Maps

and GPS

Tracy Nelson Maurer

To Ann, who always knows
the best way there

Copyright 2017 by Lerner Publishing Group, Inc.

All rights reserved. International copyright secured. No part of this book may be
reproduced, stored in a retrieval system, or transmitted in any form or by any means
electronic, mechanical, photocopying, recording, or otherwisewithout the prior written
permission of Lerner Publishing Group, Inc., except for the inclusion of brief quotations in
an acknowledged review.

Lerner Publications Company
A division of Lerner Publishing Group, Inc.
241 First Avenue North
Minneapolis, MN 55401 USA

For reading levels and more information, look up this title
at www.lernerbooks.com.

Library of Congress Cataloging-in-Publication Data

Names: Maurer, Tracy, 1965 author.

Title: Using road maps and GPS / Tracy Nelson Maurer.

Description: Minneapolis : Lerner Publications, 2016. | Series: Searchlight books : what

do you know about maps? | Includes bibliographical references and index.

Identifiers: LCCN 2015039637| ISBN 9781512409529 (lb : alk. paper) | ISBN

9781512412956 (pb : alk. paper) | ISBN 9781512410723 (eb pdf)

Subjects: LCSH: Map reading Juvenile literature. | RoadsMapsJuvenile literature. |

Global Positioning SystemJuvenile literature.

Classification: LCC GA130 .M444 2016 | DDC 910.285dc23

LC record available at http://lccn.loc.gov/2015039637

Manufactured in the United States of America
1-39541-21245-2/25/2016

Contents

WHAT ARE
ROAD MAPS AND
GPS? ... page

WHATS ON A
ROAD MAP? ... page

HOW DO YOU USE ROAD MAPS
AND GPS? ... page

ARE YOU A ROAD MAP
AND GPS WHIZ? ... page

Chapter

WHAT ARE ROAD
MAPS AND GPS?

This amazing world of ours

offers so much to see! Maps

can help us find our way. Maps

use symbols to represent places and

the living or nonliving things there. They

let us

locate these

things in our

environment.

This family uses a map
while on a road trip.
How can maps help us?

Cartographers, or
mapmakers, design
maps for certain
purposes. Some
maps mark borders
of cities or countries.
Others display facts
about a place, such
as how many people
live there. Still others
focus on roads and
highways (the main
roads in an area).
These are called road
maps. They help
people find their way
from one location
to another.

This road map shows
major roads in Illinois.

Modern Road Maps

At one time, all road maps were printed on paper. These
maps were large and had to be folded for storage when
not in use. These days, many road maps are on cell
phones and other devices. These maps can change as
roads change. For example, if a road were closed for
construction, the map might update itself to show that.
These maps can also pinpoint where you are by using
sensors in the device. Maps like this are part of the
Global Positioning System, or GPS. GPS is a system that
uses signals from satellites to tell you where you are and
to give you directions to other places.

GPS is behind the
mapped routes that
smartphones plot out.

Early GPS

Satellites are human- made objects that people
send into space to circle Earth, other planets,
and the moon. They can send signals to devices
such as cell phones. Satellites are a fairly old
technology. The first GPS satellite launched in
1978 for the military. President Ronald Reagan
made GPS free to the public in 1983. Russia,
India, China, and other countries hope to launch
similar systems.

This illustration shows
what a satellite looks like.

Helpful Road Maps

Road maps and GPS help drivers plan their trips. Some
drivers prefer winding, scenic routes that pass through
pretty or interesting landscapes. Others want the
fastest route from one location to the other.

Freeways are highways built for
fast travel. Drivers might look for
routes that include freeways if they
want to get somewhere quickly.

If you were planning a trip, you might look for points of
interest on a road map, such as campgrounds, national
parks, racetracks, museums, or schools. You might
discover a historic site or a wildlife viewing area.

Road maps can help drivers find a different route if
they need to. Construction zones, car accidents, or other
hazards may require changing routes along the way. Road
maps come in very handy when your route changes at
the last minute! Road maps help travelers in many ways.

Even GPS cant warn
drivers about every
detour ahead of time!

Did You Know?

Even before paper road maps were invented, people
had methods for finding their way around. Many
early people used piled stones called cairns as a kind
of primitive map. Cairns acted as landmarks. They
marked spots where certain natural features could
be found. They also showed the way to food and
other important resources.

These cairns
are in Iceland.

Chapter

WHATS ON A
ROAD MAP?

Road maps use a language of

their own. The language includes

symbols, special lettering, and

colors. You can learn how to read this

language.

When you

do, youll be a

road map pro!

Lines and colors are
important parts of a
road maps language.
What else does this
language include?

The Compass Rose

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