Mapbox控件 用法 安装 npm install mapbox-gl-controls 包括样式 < link href =" mapbox-gl-controls/theme.css " rel =" stylesheet " > 标尺控制 import RulerControl from 'mapbox-gl-controls/lib/ruler' ; map . addControl ( new RulerControl ( ) , 'top-right' ) ; map . on ( 'ruler.on' , ( ) => console . log ( 'ruler: