Function getCentroid

topojson/bin/process_geodata.mjs:120–139

(feature)

}

function getCentroid(feature) {
    const { type } = feature.geometry;
    const projection = geoIdentity();
    const geoPathGenerator = geoPath(projection);

    if (type === 'MultiPolygon') {
        let maxArea = -Infinity;

        for (const coordinates of feature.geometry.coordinates) {
            const polygon = { type: 'Polygon', coordinates };
            const area = geoPathGenerator.area(polygon);
            if (area > maxArea) {
                maxArea = area;
                feature = polygon;
            }
        }
    }

    return geoPathGenerator.centroid(feature).map((coord) => +coord.toFixed(2));
}

async function createCountriesLayer({ bounds, filter, name, resolution, source }) {
    const inputFilePath = `${outputDirGeojson}/${unFilename}_${resolution}m/${source}.geojson`;