map.apps Bundle APIs 4.20.0
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    Interface TransformerStrategy

    A transformer strategy is an interface used by the CoordinateTransformer to forward the transformation to a specific implementation.

    In your manifest.json:

    "components": [{
    "name": "MyCustomTransformerStrategy",
    "provides": "coordinatetransformer.CustomTransformerStrategy"
    }]

    In your code (MyCustomTransformerStrategy.ts):

    export default class MyCustomTransformerStrategy implements TransformerStrategy {
    transform(
    geometry: Items<Geometry>,
    sourceSRS: SpatialReference,
    targetSRS: SpatialReference
    ): Items<Geometry> | Promise<Items<Geometry>> {
    // pseudo code
    return transformation(sourceSRS, targetSRS).transform(geometry);
    }
    }
    interface TransformerStrategy {
        transform(
            geometry: Items<Geometry>,
            sourceSRS: SpatialReference,
            targetSRS: SpatialReference,
        ): Items<Geometry> | Promise<Items<Geometry>>;
    }
    Index

    Methods

    Methods

    • Transforms a geometry.

      Parameters

      • geometry: Items<Geometry>

        input geometry

      • sourceSRS: SpatialReference

        source spatial reference system

      • targetSRS: SpatialReference

        target spatial reference system

      Returns Items<Geometry> | Promise<Items<Geometry>>

      The transformed geometry (if input was an array, output will be an array of transformed geometries). The types of the geometries must stay the same.