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    Interface TransformServiceInterface

    Provide access to coordinate reference systems and to transforms between them.

    For convenience, this service provides a transform from WGS 84 to local Cartesian coordinates, as well as the inverse transform. The local coordinate system will be relocated occasionally. Subscribe to the related signals to get notified when that occurs and recompute all local coordinates.

    interface TransformServiceInterface {
        crsGlobal: ReferenceSystemInterface;
        crsLocal: ReferenceSystemInterface;
        globalToLocal: TransformInterface;
        localReferenceSystemReady: Promise<void>;
        localToGlobal: TransformInterface;
        onAfterLocalReferenceSystemChange: Signal<() => void>;
        onBeforeLocalReferenceSystemChange: Signal<() => void>;
        referenceSystems: ReferenceSystemInterface[];
        downloadProj4Definition(epsgName: string): Promise<void>;
        getReferenceSystem(name: string): ReferenceSystemInterface;
        getTransform(
            source: ReferenceSystemInterface,
            target: ReferenceSystemInterface,
        ): TransformInterface;
    }
    Index

    Properties

    crsGlobal crsLocal globalToLocal localReferenceSystemReady localToGlobal onAfterLocalReferenceSystemChange onBeforeLocalReferenceSystemChange referenceSystems

    Methods

    downloadProj4Definition getReferenceSystem getTransform

    Properties

    crsGlobal: ReferenceSystemInterface

    WGS 84 coordinate reference system (EPSG:4326)

    crsLocal: ReferenceSystemInterface

    Local working coordinate reference system (NAVVIS:LOCAL)

    globalToLocal: TransformInterface

    Transform from WGS 84 to the local working coordinate system

    localReferenceSystemReady: Promise<void>

    Promise that resolves when the local reference system has been set

    localToGlobal: TransformInterface

    Transform from local working coordinate system to WGS 84

    onAfterLocalReferenceSystemChange: Signal<() => void>

    Signal that is emitted after the local reference system has been changed

    onBeforeLocalReferenceSystemChange: Signal<() => void>

    Signal that is emitted before the local reference system is changed

    referenceSystems: ReferenceSystemInterface[]

    List of registered reference systems

    Methods

    • Download the Proj.4 definition for the provided EPSG coordinate reference system and add it to Proj4js' definitions.

      Parameters

      • epsgName: string

        Name of the system, e.g. "EPSG:31468".

      Returns Promise<void>

      Promise that resolves when the download has completed.

    • Get a coordinate reference system by name (e.g. "EPSG:4326" or "NAVVIS:LOCAL").

      Throws a .ReferenceSystemNotFoundException if the reference system cannot be found.

      Parameters

      • name: string

        Reference system name (AUTHORITY:ID)

      Returns ReferenceSystemInterface

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