Package org.apache.sis.referencing.operation

Relationship between any two Coordinate Reference Systems (CRS).

See: Description

Class Summary

Class	Description
AbstractCoordinateOperation	Describes the operation for transforming coordinates in the source CRS to coordinates in the target CRS.
DefaultConversion	A parameterized mathematical operation that converts coordinates to another CRS without any change of datum.
DefaultCoordinateOperationFactory	Creates operations capable to transform coordinates from a given source CRS to a given target CRS.
DefaultFormula	Specification of the coordinate operation method formula.
DefaultOperationMethod	Describes the algorithm and parameters used to perform a coordinate operation.
DefaultPassThroughOperation	Specifies that a subset of a coordinate tuple is subject to a specific coordinate operation.
DefaultTransformation	A parameterized mathematical operation that transforms coordinates to another CRS with a change of datum.

Exception Summary

Exception	Description
MismatchedDatumException	Thrown when the source and target CRS of a conversion use different datum.

Package org.apache.sis.referencing.operation Description

Relationship between any two Coordinate Reference Systems (CRS). An explanation for this package is provided in the OpenGIS® javadoc. The remaining discussion on this page is specific to the Apache SIS implementation.

This package provides an ISO 19111 Coordinate Operation implementation and support classes. The actual transform work is performed by the following sub-packages, but most users will not need to deal with them directly:

• org.apache.sis.referencing.operation.projection — map projections,
• org.apache.sis.referencing.operation.transform — any transform other than map projections.

Apache SIS extensions

Some SIS implementations provide additional methods that are not part of OGC/ISO specifications:

• AbstractCoordinateOperation.getLinearAccuracy() — tries to convert the accuracy to metres,
• DefaultConversion.specialize(…) — changes a defining conversion into a complete conversion.

Apache SIS specific behavior

The following operations have a behavior in Apache SIS which may be different than the behavior found in other softwares. Those particularities apply only when the math transform is created directly. Users do not need to care about them when the coordinate operation is inferred by Apache SIS for a given pair of CRS.

• Longitude rotation (EPSG:9601) — the longitude offset may be specified in any units, but SIS unconditionally converts the value to degrees. Consequently the user is responsible for converting the longitude axis of source and target CRS to degrees before this operation is applied.

Since:

0.6

Defined in the sis-referencing module