Spectra Precision ProMark Field Software - Manual (Page 18)

English
12
4. Choose the World Geodetic System or the country where
your field operations will take place.
5. In the field just underneath, choose the datum used
6. In the field just underneath, choose the projection used.
7. Choose the vertical datum in the last field. The default
possible choices are:
– Ellipsoid: Each altitude or height value is simply
determined with respect to the selected ellipsoid
(second field above).
– EGM84: Each altitude or height value is still initially
determined with respect to the selected ellipsoid but a
correction is applied to that value. The correction is
read from the EGM84 geoid (Earth Geoid Model 1984,
a global geoid model) and is specific to the computed
horizontal position.
– MN75: Each altitude or height value is still initially
determined with respect to the selected ellipsoid but a
correction is applied to that value. The correction is
read from the MN75 geoid model (a Romanian model).
Other geoid models may be downloaded to the receiver via
the ProMark Field CD from the Spectra Precision website.
Once downloaded, they are made available as possible
choices in the
Vertical Datum field.
NOTE: If none of the available horizontal systems and
vertical datums are suitable, then you can create a
specific coordinate system by tapping
New on the
coordinate system selection screen. To create a new
coordinate system, see Defining a User System on
page 14.
8. Tap OK. If you chose to save the job in csv format, this
terminates the job creation procedure right away. The
software will close the currently open job and open the
new one instead.
But if you chose to save the job as an shp file, ProMark
Field will then give you the option of defining attributes for
each point, line or polygon you will collect: