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GEOG 1401 Lab - Maps
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Gravity
Terms in this set (42)
What is the most widely used grid system on Earth?
Geographic Grid
Meridians
Longitude lines that measure 0-180 degrees East or West of the Prime Meridian
Prime Meridian
0 Degree Longitude line that passes through Greenwich, England
Parallels
Latitude lines that measure 0 - 90 degrees north or south of the Equator
Arctic Circle
66.5 degrees North
Antarctic Circle
66.5 degrees South
Tropic of Capricorn
23.5 degrees South & experiences Sun's vertical rays on December 21-22 (WS)
Tropic of Cancer
23.5 degrees North & experiences Sun's vertical rays on June 21-22 (SS)
Equator
0 Degrees N/S & experiences Sun's vertical rays on March 21-22 (SE) and September 22-23 (FE)
Verbal Scale
equates a specific linear distance on the map with a certain ground distance
Linear/ Bar Scale
Consist of a calibrates line/bar which represents ground distances.
Fractional Scale/Representative Fraction
Given as a ratio of a given unit of length on the map to the number of those same unites on the ground. 1:1,000,000 or 1/1,000,000
63,360
inches per mile
Convert RF 1:950,400 to Verbal Scale
1 inch = 15 miles
Convert Verbal Scale 1" = 300 miles to RF
1:19,008,000
Method to convert to RF to Verbal Scale
Divide 63,360 by denominator (right of colon)
Method to convert Verbal Scale to RF
Multiply 63,360 by verbal scale
Linear Distance
distance in feet, miles, kilometers measured along a line between two points.
Angular Distance
(Degrees, Minutes, Seconds) Smallest angle between two points measured across meridians and parrellels
Azimuth System
Directional system using degrees. North - 0/180, East - 90, South - 180, & West - 270
Mariner's Compass
Directional system using compass directions. North, South, East, and West
Which continents does the Tropic of Capricorn pass through?
South America, Africa, and Australia
Which continents does the Tropic of Cancer pass through?
North America, Africa, and Asia
Which continent does the International Date Line pass through?
Antarctia
Statute Mile
5280 feet referred as a "mile".
69 Miles
Distance Between Latitudes
Earth's Circumference
24,900 miles
1 degree
60 minutes or 3,600 seconds
1 minute
60 seconds
Approximately how many STATUTE miles is Miami, Florida, located at 25 degrees N, 80 degrees W, from the South Pole?
7500
8000
8500
9000
8000
At its maximum, east longitude extends how many degrees?
0
23.5
90
180
180
Calculate the representative fraction when the verbal scale is 1 inch = 25 miles (select closest answer).
1: 1,467,000
1: 1,563,000
1: 1,584,000
1: 1,458,000
1:1,584,000
Calculate the verbal scale when the representative fraction is 1:4,000,000 (round to the nearest 10 mile interval).
1 inch = 50 miles
1 inch = 60 miles
1 inch = 90 miles
1 inch = 100 miles
1 inch = 60 miles (True Answer 63.13)
From the North Pole, one degree of latitude extends approximately how many statute miles on the ground?
40
50
60
70
70 (True Answer 69)
How many SECONDS of latitude are there between 26 degrees S and 14 degrees N?
135,000
144,000
154,000
169,000
144,000
The equatorial circumference of Neptune is 96,695 miles. On Neptune, one degree of longitude would be equal to approximately how many statute miles?
377.19
268.59
293.45
318.67
96,695/360 = 268.59
There are how many degrees of latitude between the Tropic of Capricorn and the Arctic Circle?
23.5
47
90
180
90 (23.5 + 66.5)
What is the longitude of a point 3/4 of the distance between the Prime Meridian and 60 degrees W as measured in an EASTERLY direction from the Prime Meridian?
147 degrees E
114 degrees S
135 degrees W
167 degrees N
135 degrees W
(180 + (180-60)) = 300
300* .75) = 225
360 - 225 = 135
What meridian would be OPPOSITE 137 degrees E on a globe?
137 degrees W
43 degrees E
137 degrees E
43 degrees W
43 degrees W
180- 137
When converted to the proper form, 63 degrees, 234 minutes, 99 seconds is equal to:
65 degrees, 24 minutes, 19 seconds
66 degrees, 55 minutes, 39 seconds
66 degrees, 23 minutes, 29 seconds
64 degrees, 14 minutes, 49 seconds
66 Degrees, 55 Minutes, 39 Seconds
99 seconds - proper 60 = 39 Seconds
234 + carried over 1 minute = 235
(235/60 = 3.9) (60x3=180)
235-180 = 55 minutes
63 + carried over 3 degrees = 66 Degrees
T or F. 270 degrees on the azimuth system would be the same as west on the Mariner's Compass.
True
T or F. Meridians measure distances east or west of the Prime Meridian.
True
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