A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Ga Gb Gd Ge Gi Gl Gm Gn Go Gp Gr Gs Gu

geoid-ellipsoid separation

[geodesy] The distance from the surface of an ellipsoid to the surface of the geoid, measured along a line perpendicular to the ellipsoid. The separation is positive if the geoid lies above the ellipsoid, negative if it lies below.