GPS 101GPS 101Lisa Buck

West Blocton High School West Blocton, Alabama

33o 06’ 48’’ N

87o 07’ 44’’ W

VocabularyVocabulary

• Waypoint

• Tracks

• Route

• Trip Computer

Navigation Button

What is a GPS What is a GPS How Do You Use It How Do You Use It

And AndWhat Do You What Do You Do With It?Do With It?

Mark

Waypoint

A GPS is a …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

Various Types of GPSsVarious Types of GPSs

The Recreational GPSThe 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

To map dataTo make mapsTo find the carTo find a prize

But for a variety of reasons

What To DoWhat To Do

• Math –

Finding Areas, Measuring Distances

• History –

Studying Columbus or Lewis & Clark

• Geography

Longitude and LatitudeLongitude and Latitude

http://www.hammondmap.com/sites/hammond/geography/latlong1.html

http://kids.earth.nasa.gov/archive/nino/global.htmlhttp://kids.earth.nasa.gov/archive/nino/global.html

• 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.

Global Wind Patterns

Trade WindsTrade Winds

•

• http://www.ucalgary.ca/applied_history/tutor/eurvoya/index.swf

5400 miles, in 36 days, in 1492

Figuring the Lines of Figuring the Lines of LongitudeLongitude

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

0, 00, 0

http://support.esri.com/index.cfm?fa=knowledgebase.techarticles.articleShow&d=27589&print=true

Longitude & Latitude Longitude & Latitude of the U.S.of the U.S.

http://rockyweb.cr.usgs.gov/outreach/gps/UTM_Zones_USA48.jpg

Now That You’re Now That You’re Worldly, You Need Worldly, You Need

To Run The NumbersTo Run The Numbers

Reading A GPSReading A GPS3 Formats3 Formats

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

hemisphere degrees, minutes, secondshemisphere degrees, minutes, seconds 3333o 07’ 03”N 87 07’ 03”N 87o 07’ 02” W 07’ 02” Whemisphere degrees, minuteshemisphere degrees, minutes 3333o 07’ 043”N 87 07’ 043”N 87o 07’ 02”W 07’ 02”Whemisphere degreeshemisphere degrees33 11.73533 11.735oN 87 11.718N 87 11.718oWW

ConversionsConversions

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.

However it’s a However it’s a Sliding ScaleSliding 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.

I Need You To Cosign I Need You To Cosign CosineCosine

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

IdeasIdeas 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

Let’s Get…Let’s Get…

http://www.healingway.org.uk/reflexology-hands.html