3.0.12 • Published 8 years ago
turf-center v3.0.12
turf-center
turf center module
turf.center(features)
Takes a FeatureCollection and returns the absolute center point of all features.
Parameters
parameter | type | description |
---|---|---|
features | FeatureCollection | input features |
Example
var features = {
"type": "FeatureCollection",
"features": [
{
"type": "Feature",
"properties": {},
"geometry": {
"type": "Point",
"coordinates": [-97.522259, 35.4691]
}
}, {
"type": "Feature",
"properties": {},
"geometry": {
"type": "Point",
"coordinates": [-97.502754, 35.463455]
}
}, {
"type": "Feature",
"properties": {},
"geometry": {
"type": "Point",
"coordinates": [-97.508269, 35.463245]
}
}, {
"type": "Feature",
"properties": {},
"geometry": {
"type": "Point",
"coordinates": [-97.516809, 35.465779]
}
}, {
"type": "Feature",
"properties": {},
"geometry": {
"type": "Point",
"coordinates": [-97.515372, 35.467072]
}
}, {
"type": "Feature",
"properties": {},
"geometry": {
"type": "Point",
"coordinates": [-97.509363, 35.463053]
}
}, {
"type": "Feature",
"properties": {},
"geometry": {
"type": "Point",
"coordinates": [-97.511123, 35.466601]
}
}, {
"type": "Feature",
"properties": {},
"geometry": {
"type": "Point",
"coordinates": [-97.518547, 35.469327]
}
}, {
"type": "Feature",
"properties": {},
"geometry": {
"type": "Point",
"coordinates": [-97.519706, 35.469659]
}
}, {
"type": "Feature",
"properties": {},
"geometry": {
"type": "Point",
"coordinates": [-97.517839, 35.466998]
}
}, {
"type": "Feature",
"properties": {},
"geometry": {
"type": "Point",
"coordinates": [-97.508678, 35.464942]
}
}, {
"type": "Feature",
"properties": {},
"geometry": {
"type": "Point",
"coordinates": [-97.514914, 35.463453]
}
}
]
};
var centerPt = turf.center(features);
centerPt.properties['marker-size'] = 'large';
centerPt.properties['marker-color'] = '#000';
var resultFeatures = features.features.concat(centerPt);
var result = {
"type": "FeatureCollection",
"features": resultFeatures
};
//=result
Returns Feature.<Point>
, a Point feature at the absolute center point of all input features
Installation
Requires nodejs.
$ npm install turf-center
Tests
$ npm test
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