Package org.deegree.crs.transformations

A Transformation can be defined as an mathematical operation which transforms some values into other values using a specified function.

See:
Description

Class Summary

Transformation

The Transformation class supplies the most basic method interface for any given transformation.

Package org.deegree.crs.transformations Description

A Transformation can be defined as an mathematical operation which transforms some values into other values using a specified function. In geographic terms this means, that some incoming coordinate in a specified crs, must be transformed into a coordinate valid for some other crs. In general two different transformations can be distinguished:

1. The helmert transformation allows coordinate transformation with a datum shift by going to euclidean space and normalizing to WGS84
2. Polynomial transformations use a polynomial to approximate a function which directly transforms coordinates from one crs into another.

To accommodate these transformation the deegree crs package defines different transformation packages:

• coordinate, which defines classes for chaining transformations (e.g. transformation steps). The resulting concatenated transformation will define a function which transforms coordinates between two different coordinate systems
• helmert, which transforms coordinates from one euclidean R^3 space into another
• polynomial, which transforms coordinates direct between two different coordinate system using a polynomial function

The TransformFactory tries to create the appropriate transformation(s) to maps coordinates from one coordinate systems into another.

Version:

$Revision: 17229 $, $Date: 2007-03-20 10:15:15 +0100 (Di, 20 Mrz 2007)$

Author:

Rutger Bezema, last edited by: $Author: rbezema $