A topographic map printed on plastic and molded into a threedimensional form.
Related Terms 
ISOCONCENTRATION MAP
Map or diagram of a liquid or gas system's concentration with respect to a single component of the system, shown by constantconcentration contour lines.

ISOGRIV
A line drawn on a map or chart joining points of equal grivation

CHART
A map for use by navigators.

ISOPLETH
1. An isogram indicating the variation of an element with respect to two variables, one of which is usually the time of year. The other may be time of day, altitude, or some other variable. 2. A line on a map depicting points of constant value of a variable. Examples are contours, isobars, and isogons.

ANGULAR DISTORTION
Distortion in a map projection because of noncon formity

AREAL FEATURE
A topographic feature, such as sand, swamp, vegetation, etc., which extends over an area. It is represented on the published map or chart by a solid or screened color, by a prepared pattern of symbols, or by a delimiting line

APHYLACTIC MAP PROJECTION
A map projection which is neither conformal nor equal area. Also called ARBITRARY MAP PROJECTION.

AZIMUTHAL CHART
A chart on an azimuthal map projection. Also called ZENITHAL CHART

AZIMUTHAL EQUIDISTANT CHART
A chart on the azimuthal equidistant map projection. azimuthal equidistant map projecti

AZIMUTHAL MAP PROJECTION
A map projection on which the azimuths or directions of all lines radiating from a central point or pole are the same as the azimuths or directions of the corresponding lines on the ellipsoid. This classification includes the gnomonic, stereographic, orthographic, and the azimuthal equidistant map projections. Also called ZENITHAL MAP PROJECTION.
