contour

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contour

or

contour line,

line on a topographic map connecting points of equal elevation above or below mean sea level. It is thus a kind of isopleth, or line of equal quantity. Contour lines are drawn on maps with a uniform interval of vertical distance separating them (usually 10, 20, 50, or 100 ft on American maps) and thus outline the landform configuration, or relief. They may be visualized as representing shorelines if sea level were raised in small increments. Thus the tops of hills, which would appear as separate islands, are shown as a series of closed circular contours; valleys, which would appear as elongate bays, are shown as contour lines converging toward a point at the head of the valley. Since on steep slopes there is little horizontal distance between points greatly different in height, contour lines indicating such terrain are close together; contour lines of gentle slopes are more widely separated. Maps employing contour lines are called contour, or relief, maps although they are popularly called topographic maps (see topographytopography
, description or representation of the features and configuration of land surfaces. Topographic maps use symbols and coloring, with particular attention given to the shape and elevations of terrain.
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) in the United States. Certain conventions are employed on these maps to assist the user. Contours indicating land elevations are printed in brown with every fifth contour drawn thicker and labeled with its elevation; those indicating depths of bodies of water are printed in blue. Hachure lines, pointing downslope, are attached to contour lines in order to emphasize a depression with a steep gradient. In the past, contour maps were made from ground surveys. Today they are constructed from stereographic aerial photographs and orbiting satellites, which use radar to measure elevations for land or ocean relief maps. In an analogous way, contour lines are also commonly used to map properties other than elevation; meteorologists, for example, employ contour lines, or isobars, to delineate areas of equal barometric pressures.

CONTOUR

(kon -toor) A NASA mission to be launched in July 2002 to study at least three comets: Encke (2003), Schwassmann–Wachmann-3 (2006), and d'Arrest (2008). The mission is designed so that it could be retargeted to intercept other unforseen comets.

contour

[′kän‚tu̇r]
(mapping)
(physics)
A curve drawn up on a two-dimensional diagram through points which satisfy f (x,y) = c, where c is a constant and f is some function, such as the field strength for a transmitter.
(science and technology)
The periphery of a figure or body.

contour

contour
i. Lines on a map joining places of equal height above a selected datum level. They are drawn at a suitable interval, and the greater the bunching, the steeper the slope. The highest point is shown as a spot height.
ii. A line on a radarscope that shows the areas of equal radar echo intensity.
References in periodicals archive ?
Contours member Joanne Glynn, 27, added: "I love the variety at Contours and the flexibility of being able to go to different locations.
We spend several weeks on the art of the contour line.
CONTOUR KIT BEFORE you choose your contouring essentials, look at how you might normally apply your make-up.
The spatial mosaic of the leading woodlands is composed of 12583 contours the total area of which makes 12594 [km.sup.2.] The average area of the contour makes about 1 [km.sup.2.] The standard deviation of the area sizes makes 2.4, the variation coefficient makes 0.42, indicating that the pattern heterogeneity and its strive for grouping.
Curvature scale space descriptor is a closed contour descriptor used by MPEG-7 standard image database and has performance of translation, rotation, and scale invariance, as well as relatively stronger noise immunity.
Zhang, "Active contours driven by local image fitting energy," Pattern Recognition, vol.
All Contours gyms have InBody 230 machines, which precisely measure muscle mass, body fat, BMI and more.
The difference in standard error between Caselles and Lankton active contours is 0.0021, which is really insignificant.
To improve the robustness of active contours, the shape prior [13-17] is often used.
Clarins' Parisian skin spa has long been getting feedback from Japanese women, particularly those who want a 'beautiful, refined, smaller face and a perfect 'V' shape contour.'
Although elevation mapping technology now allows production of DEMs directly from measured points, accurate interpolation from contours is still important in areas where high-resolution DEMs are not available (Taud et al., 1999; Werbrouck et al., 2011) or in cases where historical contour maps are used to evaluate topographic change (Carley et al., 2012).
To estimate target volume and motion, contours for the gross target volume (GTV) are required on all the phases of the 4D data.