Upload
alberta-ross
View
218
Download
0
Tags:
Embed Size (px)
Citation preview
GPS 101GPS 101Lisa Buck
West Blocton High School West Blocton, Alabama
33o 06’ 48’’ N
87o 07’ 44’’ W
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?
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
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