Leica GPS1200+, Technical Reference Manual, Page: 799 / 1442

COGO 799
Description of fields
Field Option Description
<Distance
Type:> The type of distances and offsets to be accepted as
input or shown as output, and used in the calculation.
Grid Distances are calculated as the trigonometric
distance between the position of two points. The
distance field is
<HDist-Grid:> .
Ground Distances are horizontal distances between two
points at the mean elevation parallel to the ellipsoid of
the active coordinate system. The distance field is
<HDist-Grnd:> .
Ellipsoid Distances are reduced to the ellipsoid. They are
calculated as the shortest distance between the two
points on the ellipsoid. A scale factor is applied. The
distance field is
<HDist-Ell:> .
)
In the attached coordinate system, a projec-
tion, an ellipsoid and a transformation have to
be defined to calculate grid, ground and ellip-
soid coordinates.