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THE BASICS OF PLOTING OCEAN LOCATIONS the GPS LATITUDE & LONGITUDE. Robert Perry. DISCLAIMER: The images, maps and diagrams in this presentation were taken from the public domain on the world wide web. This slide show is for non- commercial, educational purposes ONLY !

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THE BASICS OF

PLOTING

OCEAN LOCATIONS

the GPS

LATITUDE &

LONGITUDE

Robert Perry


DISCLAIMER:

The images, maps and diagrams in

this presentation were taken from

the public domain on the world

wide web. This slide show is for non-

commercial, educational purposes

ONLY !

e-mail: [email protected]


LATITUDE & LONGITUDE LINES:

LATITUDE

Lines go east

and west.

LONGITUDE

Lines go north

and south.

Map: http://worldatlas.com/aatlas/imageg.htm


a GLOBAL POSITIONING

SATELLITE RECEIVER is

used to measure and record

the LATITUDE and

LONGITUDE of a

LOCATION in DEGREES,

and MINUTES.


LATITUDE

LONGITUDE

Minutes

latitude

34O 06.54’ N

North of

equator

Degrees


Ground Tracks for the

27 Global Positioning Satellites (effective 9/28/98)


X Y Z & T

At least 4 GPSatellites must be locked in to give

Latitude, Longitude, Elevation and GPS Time.


SAMPLE ACTIVITY:

PLOT THE POSITIONS OF A FEW

LOCATIONS ON A CHART


Materials needed for this sample activity:

Copies of Santa Monica Bay

or southern California chart

pencils

Ruler or

straight-edge

Location data

(from GPS)


STEPS TO FOLLOW IN THIS ACTIVITY:

1- FIND THE LATITUDE LINE AND

DRAW IT IN PLACE USING YOUR

PENCIL AND RULER.

2- FIND THE LONGITUDE LINE AND

DRAW IT IN PLACE USING YOUR

PENCIL AND RULER

3. PLACE AN “X” TO MARK THE

SPOT WHERE LATITUDE AND

LONGITUDE LINES CROSS.






DEPTHS ARE

SHOWN

BY DARKER

COLORS

2. LOCATION OF OCEAN AND DEPTHS.



DEGREES of

LATITUDE

GET BIGGER

GOING NORTH

3. DEGREES OF LATITUDE (horizontal lines).



DEGREES of

LONGITUDE

GET BIGGER

GOING WEST

4. DEGREES OF LONGITUDE (vertical lines).


NOTICE THAT THE GRIDLINES ON THIS CHART ARE

EQUAL TO 5’ (minutes) EACH.


SAMPLE PROBLEM #1:

LOCATE THE SANTA MONICA PIER


GIVEN: THE SANTA MONICA PIER IS LOCATED AT

34O 00.50’N and 118O 29.10’W


GIVEN: THE SANTA MONICA PIER IS LOCATED AT

34O 00.50’N and 118O 29.10’W

First, we’ll

draw the

LATITUDE

LINE

using your

ruler and a

pencil.


GIVEN: THE SANTA MONICA PIER IS LOCATED AT

34O 00.50’N and 118O 29.10’W

34O 00.50’N

(green line)

is just a tiny

bit North of

34O 00.00’N


GIVEN: THE SANTA MONICA PIER IS LOCATED AT

34O 00.50’N and 118O 29.10’W

34O 00.50’N

[our location is

someplace along

this green line]


GIVEN: THE SANTA MONICA PIER IS LOCATED AT

34O 00.50’N and 118O 29.10’W

Next, let’s

draw the

LONGITUDE

LINE

using your

ruler and a

pencil.


GIVEN: THE SANTA MONICA PIER IS LOCATED AT

34O 00.50’N and 118O 29.10’W

118O 29.10’W

(yellow line)

is just a tiny

bit before

118O 30.00’W


GIVEN: THE SANTA MONICA PIER IS LOCATED AT

34O 00.50’N and 118O 29.10’W

The Santa

Monica Pier

is located where

the two lines

cross each other.


GIVEN: THE SANTA MONICA PIER IS LOCATED AT

34O 00.50’N and 118O 29.10’W

X

“X” marks

the spot !


SAMPLE PROBLEM #2:

LOCATE THE MANHATTAN BEACH PIER

X


GIVEN: THE MANHATTAN BCH. PIER IS LOCATED AT

33O 53.00’N and 118O 24.90’W

X


GIVEN: THE MANHATTAN BCH. PIER IS LOCATED AT

33O 53.00’N and 118O 24.90’W

X

33O 53.00’ is

between 33O 50’

and 33O 55’


GIVEN: THE MANHATTAN BCH. PIER IS LOCATED AT

33O 53.00’N and 118O 24.90’W

X


GIVEN: THE MANHATTAN BCH. PIER IS LOCATED AT

33O 53.00’N and 118O 24.90’W

X


GIVEN: THE MANHATTAN BCH. PIER IS LOCATED AT

33O 53.00’N and 118O 24.90’W

X

LAT and

LON cross

here


GIVEN: THE MANHATTAN BCH. PIER IS LOCATED AT

33O 53.00’N and 118O 24.90’W

X

X

“X” marks

the spot !


SAMPLE PROBLEM #3:

LOCATE THE ZUMA BEACH, MALIBU

X

X


GIVEN: ZUMA BEACH, MALIBU IS LOCATED AT

34O 01.25’N and 118O 49.50’W

X

X


GIVEN: ZUMA BEACH, MALIBU IS LOCATED AT

34O 01.25’N and 118O 49.50’W

X

X


GIVEN: ZUMA BEACH, MALIBU IS LOCATED AT

34O 01.25’N and 118O 49.50’W

X

X


GIVEN: ZUMA BEACH, MALIBU IS LOCATED AT

34O 01.25’N and 118O 49.50’W

X

X

LAT and

LON cross

here


GIVEN: ZUMA BEACH, MALIBU IS LOCATED AT

34O 01.25’N and 118O 49.50’W

X

X

X

“X” marks

the spot !


SUMMARY:

TO PLOT A LOCATION ON A CHART

1. FIND THE LATITUDE LINE

2. FIND THE LONGITUDE LINE

3. PLACE AN “x” WHERE THE TWO

LINES CROSS


“X” marks

the spot !


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