Maintain true relationships of area, although shape may be distorted. Also called Equivalent. Uses - Useful for thematic mapping where the spatial distribution of phenomena is important. Distortion is parallel to the standard lines. Used as standard base map by many U.S. agencies.
Distortion is parallel to the stan dard small circles.
Sinusoidal - conventionally uses standard central meridian and equator, along which there is no distortion. Can use constant interval for the paralle ls, so useful for displaying longitudinal relationships. Mollweide's - looks more realistic at the poles than sinusoidal. Therefore shapes are modified accordingly. Goode's homolosine - an example to demonstrate that combinations of projections can be made to combine advantages.