@seasketch/geoprocessing/dist/src/helpers/zeroGeometry.js

Geoprocessing and reporting framework for SeaSketch 2.0

// Zero polygon geometry is generated by functions like clipToGeography in place of creating a null geometry
// because libraries like turf and @types/geojson don't really support null geometries completely
// using a zero polygon geometry allows us to still calculate metrics like area and overlap
// without having to worry about null geometries.  This should work out unless we do planning
// on null island
/**
 * Returns a zero polygon geometry (three [0,0] coordinates)
 * @param sketch
 */
export function zeroPolygon() {
    return {
        type: "Polygon",
        coordinates: [[[0, 0]], [[0, 0]], [[0, 0]]],
    };
}
/**
 * Given sketch, returns the mutated sketch with a zero polygon geometry (three [0,0] coordinates)
 * @param sketch
 */
export function zeroSketch(sketch) {
    return {
        ...sketch,
        geometry: zeroPolygon(),
    };
}
/**
 * Given sketch array, returns the mutated sketches with a zero polygon geometry (three [0,0] coordinates)
 * @param sketch
 */
export function zeroSketchArray(sketches) {
    return sketches.map((sketch) => zeroSketch(sketch));
}
/**
 * Given sketch collection, returns the mutated collection with all child sketches switched to have zero polygon geometry (three [0,0] coordinates)
 * @param sketchCollection
 */
export function zeroSketchCollection(sketchCollection) {
    return {
        ...sketchCollection,
        features: sketchCollection.features.map((sketch) => zeroSketch(sketch)),
    };
}
//# sourceMappingURL=zeroGeometry.js.map