| 1 | var coordEach = require('@turf/meta').coordEach;
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| 2 |
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| 3 | /**
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| 4 | * Takes a set of features, calculates the bbox of all input features, and returns a bounding box.
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| 5 | *
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| 6 | * @name bbox
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| 7 | * @param {FeatureCollection|Feature<any>} geojson input features
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| 8 | * @returns {Array<number>} bbox extent in [minX, minY, maxX, maxY] order
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| 9 | * @example
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| 10 | * var line = {
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| 11 | * "type": "Feature",
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| 12 | * "properties": {},
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| 13 | * "geometry": {
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| 14 | * "type": "LineString",
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| 15 | * "coordinates": [[-74, 40], [-78, 42], [-82, 35]]
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| 16 | * }
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| 17 | * }
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| 18 | * var bbox = turf.bbox(line);
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| 19 | *
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| 20 | * //addToMap
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| 21 | * var bboxPolygon = turf.bboxPolygon(bbox);
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| 22 | * var addToMap = [line, bboxPolygon]
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| 23 | */
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| 24 | module.exports = function (geojson) {
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| 25 | var bbox = [Infinity, Infinity, -Infinity, -Infinity];
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| 26 | coordEach(geojson, function (coord) {
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| 27 | if (bbox[0] > coord[0]) bbox[0] = coord[0];
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| 28 | if (bbox[1] > coord[1]) bbox[1] = coord[1];
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| 29 | if (bbox[2] < coord[0]) bbox[2] = coord[0];
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| 30 | if (bbox[3] < coord[1]) bbox[3] = coord[1];
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| 31 | });
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| 32 | return bbox;
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| 33 | };
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