Topographic Map – Flashcards
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these are horizontal mapping lines on the Earth known as "parallels" of (blank) due to the fact that they run parallel to the equator.
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latitude
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these degrees of lines are measured north or south of the equator up to 90 degrees "...." at either pole
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latitude
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these mapping lines divide the globe into two hemispheres: the Northern and Southern Hemisphere
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latitude
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these are vertical mapping lines on the Earth that are know as "meridians"
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longitude
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these mapping lines are a numerical way in which we can measure how far a location is east or west of the Prime Meridian
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longitude
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this is a vertical line that runs north and south over the British Royal Observatory in Greenwich England
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the prime meridian
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this is numbered 0 degrees and is the starting point for which all other longitude lines are measured from east or west of it
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the prime meridian
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what is the map scale?
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1:24,000
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1 inch on map is equal to how many inches on the earth?
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24,000 inches
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a two dimensional representation of a three dimensional geologic feature
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Topographic Map
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these are lines of equal elevation which infer the third dimension on a two dimensional map
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Contour Lines
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this is the space between contour lines which represents the differences in elevation
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Contour Interval
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a type of data from topographic maps which explains the total difference in elevation that is shown on a map
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Relief
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this is the slope of a given area of a map which divides the rise (elevation = vertical component) by the run (distance = horizontal component)
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gradient
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this is know as the run which is used to calculate the gradient of a map (slope) -it is the horizontal component of the map
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distance
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this is known as the rise used to calculate the gradient of a map (slope) - it is the vertical component of the map
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elevation
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this is a position of known elevation
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benchmark
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do contours connect areas with the same or different elevation on a map?
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same
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contour line's "V" up when a river is traveling....
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upstream
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the "V" of contour lines opens when a river is traveling....
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downstream
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this is the difference between Geographic ("True North") and Magnetic North - this is very important when navigating with a map and compass
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Magnetic Declination
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this was created because Earth's magnetic north pole is not centered on the geographic north pole
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Magnetic Declination
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these are vertical cuts of geologic features, which depict elevations and slopes along a given line
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cross sections
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this is the calculated difference between the map scale and the cross-section scale
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Vertical exaggeration
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the angle on the horizontal plane between magnetic north (the direction the north end of a compass needle points, corresponding to the direction of the Earth's magnetic field lines) and true north (the direction along a meridian towards the geographic North Pole).
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magnetic declination
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how to you calculate vertical exaggeration?
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horizontal scale/ vertical scale
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a section of Earth's surface that is bounded by lines of latitude at the top (north) and bottom (south) and by lines of longitude on the left (west) and right (east)
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quadrangle
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what does the symbol of declination loo like on the map?
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a trident shaped symbol
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the difference in degrees between compass north (magnetic north) and true north
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declination
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circles with hashmarks on a topo map represent
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depression contours
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a concentric series of closed contours represents what?
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a hill
