Turf是一个JavaScript的模块化的GIS引擎，它执行地理空间与GeoJSON数据处理任务,可以在服务器或在浏览器上运行。
Node.js示例代码：
// find all the snakes within 1 mile of a wombatvar turf = require('turf');var fs = require('fs');var wombats = fs.readFileSync('./wombats.geojson');var snakes = fs.readFileSync('./snakes.geojson');var oneMileRing = turf.buffer(wombats, 1, 'miles');var snakesNearWombats = turf.within(snakes, oneMileRing);console.log(snakesNearWombats);安装方法：
npm install turf
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