Definition

A PROJECTION having the central GEOGRAPHIC MERIDIAN repre­sented by a straight line, along which the spacing for lines representing the GEOGRAPHIC PARALLELS is proportional to the distances apart of the PARALLELS; the PARALLELS are represented by arcs of circles which are not concentric, but whose centres lie on the line representing the CENTRAL MERI­DIAN, and whose radii are determined by the lengths of the elements of cones which are tangent along the PARALLELS. All MERIDIANS except the central one are curved. This PROJECTION is neither CONFORMAL nor EQUAL AREA but it has been widely used for MAPS of small areas because of the ease with which it can be con­structed.