Allows discovery and management of the transformations used to convert coordinates between different datums.
The transformation catalog class provides a mechanism for discovering available DatumTransformation objects. You can retrieve the default transformation used internally to convert coordinates, and find other available transformations. An area of interest may be taken into account.
This class also allows you to set the location where Projection Engine data
files needed for some transformations are found on local storage. The
TransformationCatalog.projectionEngineDirectory property must be set at
process startup. Projection Engine data files are available in the
downloads area of developers.arcgis.com,
under the relevant SDK, in the Projection Engine Data section. The default
transformation used when reprojecting geometries is the most suitable
available transformation across the area covered by the input and output
spatial references. You can sometimes get a more suitable transformation for
work within a smaller area by specifying the extent of your specific work
area, using TransformationCatalog.getTransformation.
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
Static Properties
- projectionEngineDirectory ↔ Uri?
-
The directory of the Projection Engine files on the local file system.
getter/setter pair
Static Methods
-
getTransformation(
{required SpatialReference inputSpatialReference, required SpatialReference outputSpatialReference, Envelope? areaOfInterest, bool ignoreVertical = false}) → DatumTransformation? - Returns the best usable transformation used to transform between the input and output spatial references, taking into account the area of interest, if specified. Optionally disregards any vertical transformations.
-
getTransformationsBySuitability(
{required SpatialReference inputSpatialReference, required SpatialReference outputSpatialReference, Envelope? areaOfInterest, bool ignoreVertical = false}) → List< DatumTransformation> - Returns a collection of transformations suitable for projecting between the input and output spatial references, taking into account the area of interest, if specified. Optionally checks for suitable vertical transformations.