计算Netlogo中的黑白两点的距离

Question

我已经使用GIS扩展名在Netlogo上完成了地图表示，并使用.shp数据集加载了数据。现在我想获得距离b.w两点。

有什么方法可以获取我用蓝色表示的两个测站的距离b.w。距离需要通过道路来计算（例如红线和白线）

extensions [GIS]

globals [
  boundaries-gis1
Roads-gis2
  Fire_Stations-gis3
waypoints
    Buildings-gis4
]


to load

clear-all


  set Boundaries-gis1 gis:load-dataset "Boundaries.shp"
  set Roads-gis2 gis:load-dataset "Roads.shp"
  set Fire_Stations-gis3 gis:load-dataset "Fire_Stations.shp"
  set Buildings-gis4 gis:load-dataset "Buildings.shp"

  gis:set-world-envelope (gis:envelope-union-of (gis:envelope-of Boundaries-gis1)
                                                (gis:envelope-of Roads-gis2)
                                                 (gis:envelope-of Fire_Stations-gis3)
                                                 (gis:envelope-of Buildings-gis4)
                                                )


  gis:set-drawing-color red
  gis:draw Boundaries-gis1 2

  gis:set-drawing-color white
  gis:draw Roads-gis2 1

  gis:set-drawing-color blue
  gis:draw Fire_Stations-gis3 5

  gis:set-drawing-color pink
  gis:draw Buildings-gis4 2







  end