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Every fifth contour line on a topographic map, usually thicker, used to label elevation.
http://wiki.answers.com/Q/What_is_an_index_contour
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(NATO) A contour line accentuated by a heavier line weight to distinguish it from intermediate contour lines. Index contours are usually shown as every fifth contour with their assigned values, to facilitate reading elevations.
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www.dtic.mil/doctrine/jel/doddict/natoterm/i/00605.html
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(NATO) A device in which a quantity of fissionable material, less than a critical mass, has its volume suddenly decreased by compression, ... The compression is achieved by means of a spherical arrangement of specially fabricated shapes of ordinary high explosive which produce an inwardly-directed implosion wave,
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www.dtic.mil/doctrine/jel/doddict/natoterm/i/00574.html
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- Last modified March 13, 2002...
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weather.unisys.com/surface/sfc_con_heat.html
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- Last modified March 26, 2002...
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weather.unisys.com/upper_air/ua_con_lift.html
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Every fifth contour shall be drawn with a thicker line. This is an aid to the quick assessment of height difference and the overall shape of the terrain surface. Where an index contour coincides with an area of much detail, it may be shown with a normal contour line.
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homepage.ntlworld.com/mapping/isomdata/09102.htm
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(KudoZ) English to French translation of Index contours are normal contour lines of round elevation values, usually every. ... Index contours are normal contour lines of round elevation values, usually every fifth contour, but shown in a more prominent manner to facilitate the visualization...
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www.proz.com/?sp=h&id=579036
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(KudoZ) Spanish to English translation of curvas directoras: index (contour) lines [Geography]. ... English translation: index (contour) lines ... These are the heavy contour lines (curves) on a topographic map, which give the altitude in 500 foot increments. ... These are known as index contour lines. Normally,
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www.proz.com/kudoz/908017
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Southeast Dewpoint Contour ... Southeast UV Contour ... Heat Index Maps...
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www.waaytv.com/Global/category.asp?C=105381
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