Grid Defined By User - GPS TrackMaker Reference Manual

9.16 Grid Defined by User

This option is available only in GPS TrackMaker Professional® .
Introduction
Central meridian (Longitude Origin)
The central meridian or Longitude origin is the first parameter to be defined. The value must be typed in
geographical coordinates, being limited between -180º and 180º. The central meridian will determine the zero
origin of the X-axis or Easting of the system of the user's coordinate.
False Easting
After choosing the central meridian, the second step is to choose the false origin of X-axis. The false origin is
represented in meters and it corresponds to the initial value of the X-axis (Easting) on the central meridian. So, if
the chosen value was 50000 meters, this will be the initial value of the X coordinate (or Easting) on the central
meridian. Negative values are supported.
The Grid defined by User allows the creation of a metric coordinates system,
similar to a UTM zone, but with coordinate values defined by the User. Like the
UTM system, the User Grid will extend from the 84N parallel to the 80S but it
will have only one zone with a maximum width of 36 degrees, that is to say, a
maximum of 18 degrees for each side of the central meridian. The definition of
the parameters is done in Tools > Options > User Grid . To enable choose
Coordinates > User Grid option in the list of rectangular grids.
Parameters
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