GeoCalc Projection Tab
The GeoCalc Projection tab allows Global
Mapper users administrative control of geodetic parameters through Geographic
Calculator*. Once
enabled, Global Mapper will access the Geographic
Calculator datasource (GeoCalc Library) for data re projection and
coordinate transformations.
On GeoCalc Projectiontab, options are available to perform a Projection change or Coordinate
Transformation (including Vertical), using the Geographic Calculator datasource.
By default, this tab will display the current Coordinate System, Datum,
Units, Vertical Reference and Vertical Units. Changing these values will
initiate a Projection change or a Coordinate Transformation.
To save any changes made to the data's Projection, or to perform a Coordinate
System/Datum Transformation, hit the Apply
button after configuring the Coordinate System, Datum, Units, and Vertical
Reference.
Load Projection From File... this
may be used to load a coordinate system contained with in a Projection
(.prj), .txt or Esri aux.xml file format.
Save Projections To File... this
may be used to save coordinate systems to a Projection (.prj), .txt or
Esri aux.xml file format.
Coord Transforms: When a coordinate
transformation is performed, the transformation from Geographic Calculator
will populate in this window. Double-clicking on the transformation line
will bring the details of the transformation up in the Geographic Calculator
datasource window.
For
more information on any of the Coordinate Systems, Units or Datums available
hit the blue 'I' button next to that field. This will bring up a description
from the Geographic Calculator datasource (See below).