center

Takes a Feature or FeatureCollection and returns the absolute center point of all features.
取一个Feature或FeatureCollection，并返回所有Feature的绝对中心点。

参数

参数	类型	描述
geojson	GeoJSON	GeoJSON to be centered
options	Object	可选参数：见下文

options选项

属性	类型	默认值	描述
properties	Object	{}	an Object that is used as the

返回

Feature <Point> - a Point feature at the absolute center point of all input features

示例

var features = turf.featureCollection([
  turf.point( [-97.522259, 35.4691]),
  turf.point( [-97.502754, 35.463455]),
  turf.point( [-97.508269, 35.463245])
]);

var center = turf.center(features);