1. 12,700 km / 8,000 mi. diameter
2. 40,000 km / 25,000 mi. circumpherence
3. shape = oblate spheroid
4. 23 1/2° tilt from vertical = seasons
5. rotation = 1,670 kph; 1,037 mph at equator
   ... one rotation = ~24 hours
6. revolution (orbit) = 365 1/4 days = leap year
   • What is the first day of the year?
7. orbit is elliptical, NOT circular
   • perihelion = nearer (JAN)
   • aphelion = farther (JUL)
   • equinox and solstice
8. gravitational pull of sun and moon affect tides
9. gaseous atmosphere = "just right" to sustain life
   • volcanic activity = "right" mix of gases
   • "right" gravity to maintain "right" mix of gases

II. GRID SYSTEMS, MAPS, UCT, REMOTE SENSING

A. Grid Systems

1. latitude and longitude = angular measurements
   • 23½° N/S -- Tropic of Cancer / Capricorn
   • 66½° N/S -- Arctic / Antarctic Circle
     • Land of the Midnight Sun
2. 15° longitude/hour
   • 360° ÷ 24 hrs
   • = 15°/hr = time zones
   • time zone map
3. time
   • 24 hr clock (military time)
   • UCT/GMT/Z
     • PHX is 7 hrs earlier than UCT (UCT -7)
   • Daylight Saving Time
   • time zone/daylight savings map
4. township and range

1. definition
2. projections
3. legend
   • date of publication!
   • symbology
   • scale -- graphic (or linear), verbal, fractional (or relational)
4. contour lines
   • countour interval
   • index countour line & interval
5. relief

1. hot air balloons to satellite technology
   • aerial photography
     ...........example #2
     ...........example #3
   • satellite imagery
     ...........example #2
     ...........example #3
     ...........example #4
   • resolution?
     ...........example #2
2. Geographic Information Systems (GIS)
   • tracking disease outbreaks
     • SARS, Ebola, Bird Flu....
     • H1N1 / Swine Flu ...... current activity
   • crime
   • Employment ...... unemployment ...... Income Change?
   • WiFi Signal Stregnth
   • El Nino
   • Digital Elevation Models
     ... another example
   • Dance and GIS??
3. Global Positioning System (GPS) (animation)
   • combine w/ GIS
   • a multitude of applications