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26 Cards in this Set
- Front
- Back
cartography
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The science of making maps.
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conic projection
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A type of map projection that shows the meridians converging at the poles and equaly spaces parallels. They are made by puting a paper coin around a globe so the cone axis matches the globes axis.
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contour interval
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The difference in the elevation between one contour line and the next one.
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contour line
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The lines on topographic maps that are used to show elevation. Each contour line conects to points on a map that all have the same elevation.
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depression contour
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The short and straight lines that indicate a depression. They are located on close loops to indecate that a object is a depression and not a hilltop.
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elevation
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The height above sea level. This is indecated on topographic maps.
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geomagnetic pole
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The points on the earth's surface that are just above the oles of the imaginary magnet. The imagiinary compas is tilted so that the geomagnetic and geographic poles are in different locations.
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gnomic projection
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A type of map projection in which the parallels appear as cirecles that are spaced unevenly and meridians that appear as straight lines that radiat from the center. It is made by touching a sheet of paper to one of the poles on a globe.
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great circle
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Any circle that divides the earth in half.
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index contour
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Every 5th line on a topographic map that is made darker than the rest so it can be used as a reference.
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latitude
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The angular distance north or south of the equator.
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legend
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A list of map symbols and their meanings.
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longitude
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The angular distance east or west of the prime meridian.
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magnetic declination
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The angle between the direction of the earth's geomagnetic pole and the direction that a compass needle points.
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map projection
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A flat map that represents a three-dimentional curved surface.
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mean sea level
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The point midway between the highest and lowest tide levels of the ocean.
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mercator projection
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A map projection in which the meridians appear as straight, evenly spaced, parellel lines and form a grid with the parellels that are also straight and even spaced parellel lines. It is made by wrapping a cylinder of paper around a globe.
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meridian
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A semicircle on the earth that runs from pole to pole.
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parellel
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Any circle that runs from east to west around the earth. These lines run parellel to the equator.
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polyconic projection
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A map made by putting to gether a series of conic projections that are of adjoining areas.
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prime meridian
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The meridian that passes through Greenwich, England. This has been designated as zero degrees.
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relief
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The distance in elevation between the highest and lowest points of an area.
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scale
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The relationship between the distance shown on a map and the acual distance.
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topographic map
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A map that shows the surface features of the earth.
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topography
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The surface features of the earth.
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true north
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The direction of the geographic north pole.
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