Function pruneProperties

topojson/bin/process_geodata.mjs:74–118

(topojson)

}

function pruneProperties(topojson) {
    for (const layer in topojson.objects) {
        switch (layer) {
            case 'countries':
                topojson.objects[layer].geometries = topojson.objects[layer].geometries.map((geometry) => {
                    const { properties } = geometry;
                    if (properties) {
                        geometry.id = properties.iso3cd;
                        geometry.properties = {
                            ct: properties.ct
                        };
                    }

                    return geometry;
                });
                break;
            case 'subunits':
                topojson.objects[layer].geometries = topojson.objects[layer].geometries.map((geometry) => {
                    const { properties } = geometry;
                    if (properties) {
                        geometry.id = properties.postal;
                        geometry.properties = {
                            ct: properties.ct,
                            gu: properties.gu_a3
                        };
                    }

                    return geometry;
                });

                break;
            default:
                topojson.objects[layer].geometries = topojson.objects[layer].geometries.map((geometry) => {
                    delete geometry.id;
                    delete geometry.properties;

                    return geometry;
                });

                break;
        }
    }

    return topojson;
}

function getCentroid(feature) {
    const { type } = feature.geometry;