1、首先，确保你已经引入了Turf.js库。你可以通过在HTML文件中添加以下代码来引入

<script src="https://cdn.jsdelivr.net/npm/@turf/turf@6.5.0/turf.min.js"></script>

2、使用turf.buffer实现几何对象按照设定距离扩充

    let originalCoordinates = [[ -0.13236090490727292, 51.50456971900687],[-0.11407896826176511,  51.506760740677095,],[ -0.10206267187504636, 51.4987977430076,],[-0.10901495764164792, 51.486449673535816],[-0.12034460852055417,  51.49778222716637],[ -0.13236090490727292, 51.50456971900687]];// 将坐标数组转换为Turf.js的多边形对象var originalPolygon = turf.polygon([originalCoordinates]);// 定义外扩距离var expandDistance = 0.1;// 使用Turf.js的buffer方法来扩大多边形的边界expandedPolygon = turf.buffer(originalPolygon, expandDistance, { units: 'kilometers' });console.log(expandedPolygon.geometry);

效果图如下