Thales-navigation Mobile Mapper Manuel d'utilisateur télécharger pdf (Page 113)

107

Coordinate Systems in MobileMapper Office

In MobileMapper Office, the definition of a coordinate sys-

tem can be split into two different sets of parameters: hori-

zontal system and height system.

The horizontal system may be one of two types:

- Geodetic type: the system relies on the definition of a

datum. A datum is an ellipsoid with possible linear and

angular shifts

- Grid type: the system relies on the definition of a datum

and a projection

The height system may be one of two types:

- Ellipsoid elevations: All elevations are calculated from

the datum defined in the coordinate system used

- Orthometric elevations: All elevations are calculated

from the available geoid model (EGM96 Worldwide

Geoid model)

A large number of geodetic and grid systems are available

for use. However, if none of these systems is suitable for

your jobs, you can create a new one, based on the informa-

tion you have to define this system. This is described on page

109.

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Thales-navigation Mobile Mapper Manuel d'utilisateur Page 113