| 1 | var geojsonCoords = require('geojson-coords'),
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| 2 | traverse = require('traverse'),
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| 3 | extent = require('extent');
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| 4 |
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| 5 | module.exports = function(_) {
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| 6 | return getExtent(_).bbox();
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| 7 | };
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| 8 |
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| 9 | module.exports.polygon = function(_) {
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| 10 | return getExtent(_).polygon();
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| 11 | };
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| 12 |
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| 13 | module.exports.bboxify = function(_) {
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| 14 | return traverse(_).map(function(value) {
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| 15 | if (value && typeof value.type === 'string') {
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| 16 | value.bbox = getExtent(value).bbox();
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| 17 | this.update(value);
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| 18 | }
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| 19 | });
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| 20 | };
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| 21 |
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| 22 | function getExtent(_) {
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| 23 | var bbox = [Infinity, Infinity, -Infinity, -Infinity],
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| 24 | ext = extent(),
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| 25 | coords = geojsonCoords(_);
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| 26 | for (var i = 0; i < coords.length; i++) ext.include(coords[i]);
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| 27 | return ext;
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| 28 | }
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