Answer Key for Challenge

Challenge 1 – Working with Geographic Coordinates

Problem1

A)        New York City, Statue of Liberty:         74.04465   West         40.6893 North

B)        Kennedy Space Center:       80.6817      West,        28.5235 North

C)        Golden Gate Bridge:      122 : 28 : 41.9  West          37 : 49 : 7.7 North,   

D)        Chaco Canyon Ruins  :    107 : 57 : 22.0  West      36:05:53  North

 

Problem 2

  1. Latitude  35o : 28’ : 15.5”
  2.  Longitude   115o  :  15’  :  33.2”

 

Problem 3 - Convert all coordinates to decimal degrees to get Washington (38.905o, 77.037o) and Portland (45.544, 122.654). Find the mid-point between  the Latitudes:  

(38.905+45.544)/2 = 42.225 or  42o : 13’ : 30” North. Find the mid-point between  the longitudes:  (77.037+122.654)/2 = 99.846 or  99o : 50’ : 46” West.  The location of the mid-way station is at (42o : 13’ : 30” North , 99o : 50’ : 46” West ). This is 35 miles south of Ainsworth, Nebraska!

 

Problem 4

A) Convert to decimal degrees and subtract them:   39.84 – 41.12 = 1.28o.

B) A full 360-degree great circle has a circumference of 40,000 km, so 1.28o corresponds to   40000(1.28/360) =  142 kilometers.

 

Problem 5

  1. Convert to decimal degrees and subtract them:   101.71 – 94.64 = 7.07o.
  2. 7.07o corresponds to   7.07 * 86 =  608 kilometers.
  3. 7.07 x 38 = 269 kilometers or less than half the distance!

 

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