JamesHovet
commented
1 year ago Looks like there's something in that dataset that is giving gis:create-turtles-inside-polygon a hard time. The good news for you @EwoutH is that since you want the turtles you are creating to be in the center of the polygon, the old fashioned way of creating turtles from polygons (before I created gis:create-turtles-inside-polygon) still works for you! Try this for your setup-spots function:
to setup-spots
;; For each parking space, determine the centroid, convert to x,y coordinates (list with 2 elements),
;; and create a turtle in the center of that polygon
foreach gis:feature-list-of parking-dataset [ this-vector-feature ->
let center gis:centroid-of this-vector-feature
let loc gis:location-of center
if length loc >= 2 [
create-spots 1 [
setxy item 0 loc item 1 loc
set AMENITY gis:property-value this-vector-feature "AMENITY"
]
]
]
end
EwoutH
I'm using the
gis:create-turtles-inside-polygonfunction with the GIS Extension of NetLogo 6.3.0. I follow the example listed in the docs, with a few lines of code added to place each agent in the center of that polygon. That also prevents all agents outside my world envelope from being created.However, it fails with a weird error:
Extension exception: Index 0 out of bounds for length 0. I tried about everything, but it just keeps failing. Could it be my data source?@JamesHovet, since you wrote this function, do you have any idea what's going on? Or @LaCuneta?
Here are my model and data: NetLogo-GIS-test.zip
Model code
```NetLogo extensions [gis] globals [parking-dataset projection] breed [spots spot] spots-own [AMENITY] to setup clear-all load draw setup-spots end to load set projection "WGS_84_Geographic" set parking-dataset gis:load-dataset "export2.geojson" gis:set-world-envelope (list 5.671533 5.684606 52.026888 52.019735) end to setup-spots ;; For each parking space, determine the centroid, convert to x,y coordinates (list with 2 elements), ;; and create a turtle in the center of that polygon foreach gis:feature-list-of parking-dataset [ this-vector-feature -> let center gis:centroid-of this-vector-feature let loc gis:location-of center if length loc >= 2 [ gis:create-turtles-inside-polygon this-vector-feature spots 1;; [setxy item 0 loc item 1 loc] ] ] end to draw gis:set-drawing-color red gis:fill parking-dataset 0 end to clear clear-all end ```Full error
> Extension exception: Index 0 out of bounds for length 0 > error while observer running GIS:CREATE-TURTLES-INSIDE-POLYGON > called by (anonymous command: [ this-vector-feature -> let center gis:centroid-of this-vector-feature let loc gis:location-of center if length loc >= 2 [ gis:create-turtles-inside-polygon this-vector-feature spots 1 ] ]) > called by procedure SETUP-SPOTS > called by procedure SETUP > called by Button 'setup' > > org.nlogo.nvm.WrappedExtensionException: Extension exception: Index 0 out of bounds for length 0 > at org.nlogo.nvm.AnonymousCommand.perform(AnonymousProcedure.scala:212) > at org.nlogo.nvm.AnonymousCommand.perform(AnonymousProcedure.scala:184) > at org.nlogo.prim.etc._foreach.perform(_foreach.scala:38) > at org.nlogo.nvm.Context.stepConcurrent(Context.java:107) > at org.nlogo.nvm.ConcurrentJob.step(ConcurrentJob.scala:65) > at org.nlogo.job.JobThread.runPrimaryJobs(JobThread.scala:133) > at org.nlogo.job.JobThread.$anonfun$run$1(JobThread.scala:68) > at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23) > at scala.util.control.Exception$Catch.apply(Exception.scala:228) > at org.nlogo.api.Exceptions$.handling(Exceptions.scala:41) > at org.nlogo.job.JobThread.run(JobThread.scala:66) > Caused by: org.nlogo.api.ExtensionException: Index 0 out of bounds for length 0 > at com.vividsolutions.jts.geom.GeometryCollection.getGeometryN(GeometryCollection.java:138) > at org.myworldgis.netlogo.VectorFeature.getRandomTriangleWeightedByArea(VectorFeature.java:347) > at org.myworldgis.netlogo.VectorFeature.getRandomPointInsidePolygon(VectorFeature.java:359) > at org.myworldgis.netlogo.CreateTurtlesInsidePolygon$TurtlesInsidePolygon.performInternal(CreateTurtlesInsidePolygon.java:63) > at org.myworldgis.netlogo.CreateTurtlesInsidePolygon$TurtlesInsidePolygonAutomatic.performInternal(CreateTurtlesInsidePolygon.java:83) > at org.myworldgis.netlogo.GISExtension$Command.perform(GISExtension.java:61) > at org.nlogo.prim._extern.perform(_extern.java:36) > at org.nlogo.nvm.Context.runExclusive(Context.java:133) > at org.nlogo.nvm.AnonymousCommand.perform(AnonymousProcedure.scala:206) > ... 10 more > > NetLogo 6.3.0 > main: org.nlogo.app.AppFrame > thread: JobThread > OpenJDK 64-Bit Server VM 17.0.3 (BellSoft; 17.0.3+7-LTS) > operating system: Windows 11 10.0 (amd64 processor) > Scala version 2.12.16 > JOGL: (3D View not initialized) > OpenGL Graphics: (3D View not initialized) > model: GIS_test > > 01:17:21.163 RuntimeErrorEvent (org.nlogo.app.App$$anon$4 (org.nlogo.window.GUIWorkspace)) AWT-EventQueue-0 > 01:17:21.147 JobRemovedEvent (org.nlogo.app.App$$anon$4 (org.nlogo.window.GUIWorkspace)) JobThread > 01:17:21.147 OutputEvent (org.nlogo.app.App$$anon$4 (org.nlogo.window.GUIWorkspace)) AWT-EventQueue-0 > 01:17:21.139 PeriodicUpdateEvent (org.nlogo.app.App$$anon$4 (org.nlogo.window.GUIWorkspace)) AWT-EventQueue-0 > 01:17:21.139 TickStateChangeEvent (org.nlogo.app.App$$anon$4 (org.nlogo.window.GUIWorkspace)) JobThread > 01:17:21.139 OutputEvent (org.nlogo.app.App$$anon$4 (org.nlogo.window.GUIWorkspace)) AWT-EventQueue-0 > 01:17:21.139 AddJobEvent (org.nlogo.window.ButtonWidget) AWT-EventQueue-0 > 01:17:21.089 InputBoxLoseFocusEvent (org.nlogo.window.ButtonWidget) AWT-EventQueue-0 > 01:17:21.038 PeriodicUpdateEvent (org.nlogo.app.App$$anon$4 (org.nlogo.window.GUIWorkspace)) AWT-EventQueue-0 > 01:17:20.823 PeriodicUpdateEvent (org.nlogo.app.App$$anon$4 (org.nlogo.window.GUIWorkspace)) AWT-EventQueue-0