notes
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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are reference points in the earth's surface | North and South poles
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divides the Earth into North and South hemispheres | equator
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lines that run East and West parallel to the Equator | parallels
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the angular distance North or South of the equator | latitude
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each degree of latitude is _ miles and _ km | 111 m. 66.6 km
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minute sign | '
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minute equals _ km | 1.85
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minute equals _ mi. | 1.11
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sign for seconds | ''
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51 seconds of latitude is _ | 38 degrees, 53'51''N
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lines that run from pole to pole | meridian
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angular distance between East and West of the Prime Meridian | longitude
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between the longitudes and the equator= _ km | 111
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between the poles and the equator, there are_km or miles | 20km or 12 miles
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any line that circles the Earth and divides the earth into halfs; used in navigation | The Great Circle
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has an exact match - creates great circles | lines of longitude
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piece of a circle | arch
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nautical mile= | 1 minute of latitude or longitude
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Nautical miles apply to the _. Why? | air or seas- fluids
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Statute mile = | land mile
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liquid or a gas | fluid
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_ nautical miles between each | 69
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difference between nautical miles and statute mile | obstacle and curves up and down- statutestraight- nautical
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very fast spur of air | jet stream
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points on the earth surface that a compass needle points to located at the tilted axis | geometric poles
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straight up and down | geograohic north pole(true north)
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Earths geographic poles are on the ____. | axis
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Earths magnetic poles are on the _____. | points on the Earth's surface where magnetic fields are strongest
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the angle between the direction of the geographic pole and the direction in which the compass needle points | magnetic declination
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nautical mile = | 1 minute of an arc or a meridian or 6076 feet
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each degree of latitude = | 111 km or 69 miles
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unit of speed that is = to one nautical m/h | knot
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knot = | 1.51 mph
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a vessel traveling one knot along the meridian travels ____ of geographical latitude in 1 hour | 1 minute
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statute mile= _ feet | 5280
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metric mile = | 1500 meters
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a flat map that represents the 3D curved surface on a globe | map projection
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to throw out or cast forward such as a light on a screen | project
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name the three most common map projections | Mercator,Gnomonic,Conic
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distortions are always present when a __ object is projected onto a __ surface | round; flat
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Mercator projection = | cyndrilical
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How mercator projection is made- | wrap a cylinder of paper around a lighted globe
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the distortion for a mercator projection | areas near the poles have the greatest distance,because meridians appear a straight lines
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the advantage of a mercator projection- | all compass directions are straight
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How Gnomic is made- | a sheet of paper touching a lighted globe at one point
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distortions of a Gnomic projection- | point that paper touches is very accurate; everything else is distorted
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advantages of a Gnomic projection- | used in navigation when plotting Great Circles- especially plotting North Pole
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How Conic projections are made- | paper cone placed over a lighted globe at a particular location
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disortions of a Conic projection | get 1 particular location and everything else is distorted
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advantages of a Conic projection | get a clear and up close view of a particular location
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legend = | map key
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