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Leica Viva Series Technical Reference Manual - PRISM-Surveying ...

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Description of fields<br />

Field Option Description<br />

Distance type The type of distances and offsets to be accepted as<br />

input or displayed in the fields, and used in the calculation.<br />

Grid Distances are calculated as the trigonometric<br />

distance between the position of two points. The<br />

distance field is Horiz distance.<br />

Ground Distances are horizontal distances between two<br />

points at the mean elevation parallel to the ellipsoid<br />

of the active coordinate system. The distance field is<br />

Horiz dist (ground).<br />

Ellipsoid Distances are reduced to the ellipsoid. They are<br />

calculated as the shortest distance between the two<br />

points on the ellipsoid. A scale factor is applied. The<br />

�distance field is Horiz dist (ell).<br />

In the attached coordinate system, a projection,<br />

an ellipsoid and a transformation have to<br />

be defined to calculate grid, ground and ellipsoid<br />

coordinates.<br />

Use offsets Yes or No Activates the use of offsets in the COGO calculations.<br />

Editable fields for the offsets are available in the<br />

Input screen of any COGO calculation method.<br />

<strong>Viva</strong> <strong>Series</strong>, COGO 807

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