16-1.Paths 路径
- d3.geoPath - create a new geographic path generator.创建一个地理路径生成器
- path - project and render the specified feature.投影和渲染指定特征
- path.area - compute the projected planar area of a given feature.计算给定特征的平面投影
- path.bounds - compute the projected planar bounding box of a given feature.计算给定特征的投影平面边界框
- path.centroid - compute the projected planar centroid of a given feature.计算给定特征的平面投影的质心
- path.measure - compute the projected planar length of a given feature.计算给定特征的平面投影的长度
- path.projection - set the geographic projection.设置地理投影
- path.context - set the render context.设置渲染文本
- path.pointRadius - set the radius to display point features.设置显示点特征的半径
