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20 Cards in this Set
- Front
- Back
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An imaginary line on the earth's surface where the magnetic declination is zero as of a given date
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Agonic Line
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Imaginary line on the ground, where all points are at the same elevation above or below a datum
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Contour
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Distance in elevation between two adjacent contours
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Contour Intervals
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Linear and or angular quantities that designate the position of a point in relation to a given reference frame
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Coordinates
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A reference system for computing or correlating the results of a survey
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Datum
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Network of uniformly spaced parallel lines intersecting at right angles
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Grid
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Line joining points on the eart's surface having equal magnetic declination as of a given date
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Isogonic Line
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Angular distance, in degrees, minutes, seconds, of a point north or south of the equator
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Latitude
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Angular distance, in degrees, minutes, and seconds, of a point east or west of the Greenwich meridan
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Longitude
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The angular distance between magnetic north and true north at the point of observation
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Magnetic Declination
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Great circle on the surface of the earth that passes through the geographical poles and any given point on on the earth's surface
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Meridian
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an approximate circle on the surface of the earth parallel to the equator and connecting points of equal latitude
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Parallel of Latitude
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Meridan og longitude 0 degrees, used as the orgin for longitude measurements
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Prime Meridian
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Four sided area bounded by parallels of latitude
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Quad or Quadrangle
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Elevations and depression of land and sea bottom
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Relief
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Unit of a subdivision of a township. about 640 acres
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Section
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Relationship existing between a distance on a map, chart, or photo and the corresponding distance on the earth
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Scale
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Relief map
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Topography
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Unit of survey of public lands, 6 x6 miles, containing
36 sections |
Township
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another term for declination
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Variation
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