Defining a New Horizontal Datum

Programming with JViews Maps > Ellipsoid and Geodetic Datums > Geodetic Datums > Defining a New Horizontal Datum

Defining a New Horizontal Datum

JViews Maps supports the definition of three-parameter datums, that is datums defined by the shift on three axes. This kind of datum is represented by the IlvHorizontalShiftDatum class.

A horizontal shift datum is defined by the following elements:

Its name

The name should be set to null in case it is not defined.

The area of definition

This is a String describing the area of use of the datum.

A default ellipsoid

Although the datums can be used with different ellipsoids, they were designed to work with this specific ellipsoid.

The three-axis shift parameters (expressed in meters)

To define a new horizontal shift datum, initialize a new instance with the three parameters, as follows:

IlvHorizontalDatum datum =
   new IlvHorizontalShiftDatum("European 1979","Mean for europe",
      IlvEllipsoidCollection.GetKernelCollection().getEllipsoid("intl"),
         86, -98, -119)

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