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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: zalophus@UCLA.edu
LATITUDE & LONGITUDE LINES:




 LATITUDE        Map: http://worldatlas.com/aatlas/imageg.htm   LONGITUDE
 Lines go east                                                  Lines go north
 and west.                                                      and south.
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

Degrees          North of
                 equator
             Ground Tracks for the
27 Global Positioning Satellites (effective 9/28/98)
                     XYZ&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.
Our activity
   area
WHAT DOES THE NAUTICAL CHART TELL YOU ?
1. LOCATION OF LAND AND LANDMARKS.
2. LOCATION OF OCEAN AND DEPTHS.
         DEPTHS ARE
           SHOWN
         BY DARKER
           COLORS


2. LOCATION OF OCEAN AND DEPTHS.
3. DEGREES OF LATITUDE (horizontal lines).
   DEGREES of
    LATITUDE
   GET BIGGER
  GOING NORTH


3. DEGREES OF LATITUDE (horizontal lines).
4. DEGREES OF LONGITUDE (vertical 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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posted:8/17/2011
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