# Class DefaultEngineeringCRS

Object
FormattableObject
AbstractIdentifiedObject
AbstractReferenceSystem
AbstractCRS
DefaultEngineeringCRS

All Implemented Interfaces:
  `Serializable`, `Formattable`, `Deprecable`, `LenientComparable`, `Printable`, `CoordinateReferenceSystem`, `EngineeringCRS`, `SingleCRS`, `IdentifiedObject`, `ReferenceSystem`

public class DefaultEngineeringCRS extends AbstractCRS implements EngineeringCRS
A 1-, 2- or 3-dimensional contextually local coordinate reference system. It can be divided into two broad categories:

- earth-fixed systems applied to engineering activities on or near the surface of the earth;
- CRSs on moving platforms such as road vehicles, vessels, aircraft, or spacecraft.

Used with datum type: Engineering.
Used with coordinate system types: Affine, Cartesian, Cylindrical, Linear. Polar, Spherical or User Defined.

## Immutability and thread safety

This class is immutable and thus thread-safe if the property values (not necessarily the map itself), the coordinate system and the datum instances given to the constructor are also immutable. Unless otherwise noted in the javadoc, this condition holds if all components were created using only SIS factories and static constants.

Since:
  0.4
See Also:
  - `DefaultEngineeringDatum`
  - `GeodeticAuthorityFactory​.createEngineeringCRS(String)`
  - Serialized Form

- ## Field Summary

  ### Fields inherited from class AbstractIdentifiedObject

  `DEPRECATED_KEY, DOMAINS_KEY, LOCALE_KEY`

  ### Fields inherited from interface IdentifiedObject

  `ALIAS_KEY, IDENTIFIERS_KEY, NAME_KEY, REMARKS_KEY`

  ### Fields inherited from interface ReferenceSystem

  `DOMAIN_OF_VALIDITY_KEY, SCOPE_KEY`

- ## Constructor Summary

  Constructors
  Modifier
  Constructor
  Description
  ``
  `DefaultEngineeringCRS(Map<String,?> properties, EngineeringDatum datum, DefaultDatumEnsemble<EngineeringDatum> ensemble, CoordinateSystem cs)`
  Creates a coordinate reference system from the given properties, datum and coordinate system.
  ``
  `DefaultEngineeringCRS(Map<String,?> properties, EngineeringDatum datum, CoordinateSystem cs)`
  Deprecated, for removal: This API element is subject to removal in a future version.
  A `DefaultDatumEnsemble` argument has been added.
  `protected`
  `DefaultEngineeringCRS(EngineeringCRS crs)`
  Constructs a new coordinate reference system with the same values as the specified one.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `static DefaultEngineeringCRS`
  `castOrCopy(EngineeringCRS object)`
  Returns a SIS coordinate reference system implementation with the same values as the given arbitrary implementation.
  `DefaultEngineeringCRS`
  `forConvention(AxesConvention convention)`
  Returns a CRS equivalent to this one but with axes rearranged according the given convention.
  `protected String`
  `formatTo(Formatter formatter)`
  Formats this CRS as a Well Known Text `EngineeringCRS[…]` element.
  `EngineeringDatum`
  `getDatum()`
  Returns the identification of the origin of this engineering (or local) CRS.
  `DefaultDatumEnsemble<EngineeringDatum>`
  `getDatumEnsemble()`
  Returns a collection of datums which, for low accuracy requirements, may be considered to be insignificantly different from each other.
  `Class<? extends EngineeringCRS>`
  `getInterface()`
  Returns the GeoAPI interface implemented by this class.

  ### Methods inherited from class AbstractCRS

  `castOrCopy, getCoordinateSystem`

  ### Methods inherited from class AbstractReferenceSystem

  `getDomainOfValidity, getScope`

  ### Methods inherited from class AbstractIdentifiedObject

  `castOrCopy, equals, formatTo, getAlias, getDescription, getDomains, getIdentifiers, getName, getRemarks, hashCode, isDeprecated, isHeuristicMatchForName`

  ### Methods inherited from class FormattableObject

  `print, toString, toString, toWKT`

  ### Methods inherited from class Object

  `clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

  ### Methods inherited from interface IdentifiedObject

  `getAlias, getIdentifiers, getName, getRemarks, toWKT`

  ### Methods inherited from interface ReferenceSystem

  `getDomainOfValidity, getScope`

  ### Methods inherited from interface SingleCRS

  `getCoordinateSystem`

- ## Constructor Details

  - ### DefaultEngineeringCRS

    public DefaultEngineeringCRS(Map<String,?> properties, EngineeringDatum datum, DefaultDatumEnsemble<EngineeringDatum> ensemble, CoordinateSystem cs)
    Creates a coordinate reference system from the given properties, datum and coordinate system. At least one of the `datum` and `ensemble` arguments shall be non-null. The properties given in argument follow the same rules as for the super-class constructor. The following table is a reminder of main (not all) properties:

    Recognized properties (non exhaustive list)
    Property name | Value type | Returned by
    --- | --- | ---
    "name" | `ReferenceIdentifier` or `String` | `AbstractIdentifiedObject.getName()`
    "alias" | `GenericName` or `CharSequence` (optionally as array) | `AbstractIdentifiedObject.getAlias()`
    "identifiers" | `ReferenceIdentifier` (optionally as array) | `AbstractIdentifiedObject.getIdentifiers()`
    "domains" | `DefaultObjectDomain` (optionally as array) | `AbstractIdentifiedObject.getDomains()`
    "remarks" | `InternationalString` or `String` | `AbstractIdentifiedObject.getRemarks()`

    Parameters:
      `properties` - the properties to be given to the coordinate reference system.
      `datum` - the datum, or `null` if the CRS is associated only to a datum ensemble.
      `ensemble` - collection of reference frames which for low accuracy requirements may be considered to be insignificantly different from each other, or `null` if there is no such ensemble.
      `cs` - the coordinate system.
    Since:
      1.5
    See Also:
      - `GeodeticObjectFactory​.createEngineeringCRS(Map, EngineeringDatum, DefaultDatumEnsemble, CoordinateSystem)`

  - ### DefaultEngineeringCRS

    @Deprecated(since="1.5", forRemoval=true) public DefaultEngineeringCRS(Map<String,?> properties, EngineeringDatum datum, CoordinateSystem cs)
    Deprecated, for removal: This API element is subject to removal in a future version.
    A `DefaultDatumEnsemble` argument has been added.

  - ### DefaultEngineeringCRS

    protected DefaultEngineeringCRS(EngineeringCRS crs)
    Constructs a new coordinate reference system with the same values as the specified one. This copy constructor provides a way to convert an arbitrary implementation into a SIS one or a user-defined one (as a subclass), usually in order to leverage some implementation-specific API.

    This constructor performs a shallow copy, i.e. the properties are not cloned.

    Parameters:
      `crs` - the coordinate reference system to copy.
    See Also:
      - `castOrCopy(EngineeringCRS)`

- ## Method Details

  - ### castOrCopy

    public static DefaultEngineeringCRS castOrCopy(EngineeringCRS object)
    Returns a SIS coordinate reference system implementation with the same values as the given arbitrary implementation. If the given object is `null`, then this method returns `null`. Otherwise if the given object is already a SIS implementation, then the given object is returned unchanged. Otherwise a new SIS implementation is created and initialized to the attribute values of the given object.
    Parameters:
      `object` - the object to get as a SIS implementation, or `null` if none.
    Returns:
      a SIS implementation containing the values of the given object (may be the given object itself), or `null` if the argument was null.

  - ### getInterface

    public Class<? extends EngineeringCRS> getInterface()
    Returns the GeoAPI interface implemented by this class. The SIS implementation returns `EngineeringCRS​.class`.

    #### Note for implementers

    Subclasses usually do not need to override this method since GeoAPI does not define `EngineeringCRS` sub-interface. Overriding possibility is left mostly for implementers who wish to extend GeoAPI with their own set of interfaces.
    Returns:
      `EngineeringCRS​.class` or a user-defined sub-interface.

  - ### getDatum

    public EngineeringDatum getDatum()
    Returns the identification of the origin of this engineering (or local) CRS. This property may be null if this CRS is related to an object identified only by a datum ensemble.
    Specified by:
      `getDatum` in interface `EngineeringCRS`
    Specified by:
      `getDatum` in interface `SingleCRS`
    Returns:
      the engineering datum, or `null` if this CRS is related to an object identified only by a datum ensemble.

  - ### getDatumEnsemble

    public DefaultDatumEnsemble<EngineeringDatum> getDatumEnsemble()
    Returns a collection of datums which, for low accuracy requirements, may be considered to be insignificantly different from each other. This property may be null if this CRS is related to an object identified only by a single datum.
    Warning: in a future SIS version, the return type may be changed to the `org​.opengis​.referencing​.datum​.DatumEnsemble` interface. This change is pending GeoAPI revision.
    Returns:
      the datum ensemble, or `null` if this CRS is related to an object identified only by a single datum.
    Since:
      1.5

  - ### forConvention

    public DefaultEngineeringCRS forConvention(AxesConvention convention)
    Returns a CRS equivalent to this one but with axes rearranged according the given convention. If this CRS is already compatible with the given convention, then this method returns `this`.
    Overrides:
      `forConvention` in class `AbstractCRS`
    Parameters:
      `convention` - the axes convention for which a coordinate reference system is desired.
    Returns:
      a coordinate reference system compatible with the given convention (may be `this`).
    See Also:
      - `AbstractCS​.forConvention(AxesConvention)`

  - ### formatTo

    protected String formatTo(Formatter formatter)
    Formats this CRS as a Well Known Text `EngineeringCRS[…]` element.
    Overrides:
      `formatTo` in class `AbstractCRS`
    Parameters:
      `formatter` - the formatter where to format the inner content of this WKT element.
    Returns:
      `"EngineeringCRS"` (WKT 2) or `"Local_CS"` (WKT 1).
    See Also:
      - `FormattableObject​.toWKT()`
      - `FormattableObject​.toString()`