polylabel 0.1.11

A Rust implementation of the Polylabel algorithm
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40

function flatten(gj) {
    switch ((gj && gj.type) || null) {
        case 'FeatureCollection':
            gj.features = gj.features.reduce(function(mem, feature) {
                return mem.concat(flatten(feature));
            }, []);
            return gj;
        case 'Feature':
            if (!gj.geometry) return gj;
            return flatten(gj.geometry).map(function(geom) {
                return {
                    type: 'Feature',
                    properties: JSON.parse(JSON.stringify(gj.properties)),
                    geometry: geom
                };
            });
        case 'MultiPoint':
            return gj.coordinates.map(function(_) {
                return { type: 'Point', coordinates: _ };
            });
        case 'MultiPolygon':
            return gj.coordinates.map(function(_) {
                return { type: 'Polygon', coordinates: _ };
            });
        case 'MultiLineString':
            return gj.coordinates.map(function(_) {
                return { type: 'LineString', coordinates: _ };
            });
        case 'GeometryCollection':
            return gj.geometries.map(flatten).reduce(function(memo, geoms) {
                return memo.concat(geoms);
            }, []);
        case 'Point':
        case 'Polygon':
        case 'LineString':
            return [gj];
    }
}

module.exports = flatten;