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Tyner indb
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Bog'liq Judith A. Tyner. Principles of map design. New York. „The Guilford Press”, 2010Conformal projections. Projections on which the shapes of very small areas are preserved.
Parallels and meridians cross at right angles and scale is the same about a point.
Conic projections. Projections that appear to have been projected onto a cone.
Contiguous cartogram. A value-by-area cartogram in which the different areas represented
preserve boundaries. Adjacent areas retain internal boundaries.
Continuous distribution. A geographic distribution that occurs everywhere within the mapped
area.
Contour interval. The vertical distance between two adjacent contours.
Contour line. A line that joins all points having the same elevation above or below a datum,
usually mean sea level. A type of isarithmic line, also called an “isohypse.”
Contour spacing. The horizontal or map distance between two adjacent contour lines.
Contrast. Differences in light and dark shades, thick and thin lines, large or small type, rough
or smooth textures or patterns on a map. A map that lacks contrast is visually uninter-
esting and hard to read.
Control points. Points on a map that have known horizontal locations and known values that
are used in estimating positions for isarithmic lines. Control points for contour lines
are spot elevations; for isotherms the points may be weather stations.
Conventional projection. A term used in some classifications of projections to describe all
except azimuthal, cylindrical, and conic projections. Also called “mathematical” pro-
jections.
Cybercartography. A term coined by D. R. F. Taylor in 1997 to describe mapping on the Web
and virtual cartography.
Cylindrical projections. Projections that appear to have been created by projecting the earth’s
grid onto a cylinder.
Dasymetric map. A variation of the choropleth map. Color or shading is applied to areas of
homogeneity and is not restricted to administrative or statistical boundaries.
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