GPS 101

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GPS 101

• Lisa Buck
• West Blocton High School
• West Blocton, Alabama

33o 06 48 N 87o 07 44 W
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Vocabulary

• Waypoint
• Tracks
• Route
• Trip Computer

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Navigation Button
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What is a GPS How Do You Use It AndWhat Do
You Do With It?
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Mark Waypoint
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A GPS is a
Electronic instrument to determine a location
based on information it receives from
satellites Stands for Global Positioning
System Is the electronic replacement for
compasses in determining location Is the
electronic replacement for astronomy in
determining location
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Various Types of GPSs
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The Recreational GPS

• When powered on will take several minutes to
  lock onto satellites. These satellites are
  11,000 miles in orbit
• Used to find Longitude and Latitude

But for a variety of reasons

• To map data
• To make maps
• To find the car
• To find a prize

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What To Do

• Math
• Finding Areas, Measuring Distances
• History
• Studying Columbus or Lewis Clark
• Geography

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Longitude and Latitude
http//www.hammondmap.com/sites/hammond/geography/
latlong1.html
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http//kids.earth.nasa.gov/archive/nino/global.htm
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Global Wind Patterns

• Trade Winds - About thirty degrees north south
  of equator.
• Prevailing Westerlies - Between thirty sixty
  degrees latitude, winds that move toward poles
  appear to curve to east. Winds are named from
  direction they originate.
• Easterlies - About sixty degrees latitude (both
  hemispheres) prevailing westerlies join with
  polar easterlies to reduce upward motion. Polar
  easterlies form when atmosphere over the poles
  cools. Cool air sinks spreads over surface. As
  air flows away from poles, is turned to the west
  by Coriolis effect.

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Trade Winds
5400 miles, in 36 days, in 1492

• http//www.ucalgary.ca/applied_history/tutor/eurvo
  ya/index.swf

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Figuring the Lines of Longitude
http//worldatlas.com/aatlas/imageg.htm
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0, 0
http//support.esri.com/index.cfm?faknowledgebase
.techarticles.articleShowd 27589printtrue
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Longitude Latitude of the U.S.
http//rockyweb.cr.usgs.gov/outreach/gps/UTM_Zones
_USA48.jpg
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Now That Youre Worldly, You Need To Run The
Numbers
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Reading A GPS3 Formats

• hemisphere degrees, minutes, seconds
• hemisphere degrees, minutes
• hemisphere degrees

hemisphere degrees, minutes, seconds 33o 07
03N 87o 07 02 W hemisphere degrees,
minutes 33o 07 043N 87o 07
02W hemisphere degrees 33 11.735oN 87
11.718oW
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Conversions

• 1035.75 miles between latitude lines
• 69.05 miles between 1 degree of latitude
• 1.15 miles between minutes
• .019 miles between seconds which
  equals100 feet and 3.5 inches.

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However its a Sliding Scale

• At 38 degrees North latitude
• one degree of latitude equals approximately
  364,000 ft (69 miles), one minute equals 6068 ft
  (1.15 miles), one-second equals 101 ft.
• one-degree of longitude equals 288,200 ft (54.6
  miles), one minute equals 4800 ft (0.91 mile),
  and one second equals 80 ft.

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I Need You To Cosign Cosine

• Open the calculator in Windows
• (Start ? Programs? Accessories? Calculator)
• Click on View Scientific
• Choose Decimal and Degrees
• Type in known latitude
• Click the Cosine Key (cos)
• Multiply answer by 69

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Ideas

• Mapping to figure area
• Solving problems to get the co-
• ordinates to find a geocach
• Tracing Expeditions
• http//www.lewis-clark.org/
• http//www.americanwest.com/
• trails/pages/ponyexp1.htm

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Lets Get
http//www.healingway.org.uk/reflexology-hands.htm
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