步行路线规划可以根据起终点获取驾车步行规划数据，并可以通过Polyline绘制出步行路线，效果图：

let option: WalkingRoutePlanOption = {
from: PlanNode.withLocation(fromArr),
to: PlanNode.withLocation(toArr)
}
RoutePlanSearch.newInstance().walkingSearch(option)
.then((res: WalkingRouteResult) => {
  let resultLine: Array<LatLng> = []
  if (typeof res.routeLines === "undefined") {
    return
  }
  let line = res.routeLines[0]
  let steps = line.steps
  for (let i = 0; i < steps.length; i++) {
    let step = steps[i]
    let llAry: LatLng[] = parseGeoStr2LLArray(step.pathString)
    llAry.forEach(element => {
      resultLine.push(element)
    })
  }

  let polyline: Polyline = new Polyline({
    points: resultLine,
    fillcolor: '#6af',
    width: 10,
    join: SysEnum.LineJoinType.ROUND,
    cap: SysEnum.LineCapType.ROUND,
    isThined: true,
    isGeodesic: false,
    zIndex: 1
  });
  this.map?.addOverlay(polyline);
})