5
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Bug introduced in 12.2.0 or earlier and persisting through 13.1.0

I am using v12.2.0-Win7-x64.

I have been experimenting with Geo* command syntaxes and came across something that is an obvious bug. I have left a Tooltip in the image below. The city of Amritsar is in India.

cities = TakeLargestBy[
  EntityValue[GeoEntities[Entity["Country", "Pakistan"], "City"], 
   "Population", "EntityAssociation"], Value @@@ # &, 20]

enter image description here

I would like to know if this is version dependent or if it can be replicated on other platforms/versions. Thanks for your help in advance.

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2
  • 1
    $\begingroup$ This bug is reproducible in 13.1 on Windows 10. $\endgroup$
    – user64494
    Commented Oct 16, 2022 at 16:53
  • $\begingroup$ TakeLargestBy[ EntityValue[GeoEntities[Entity["Country", "Russia"], "City"], "Population", "EntityAssociation"], Value @@@ # &, 10] performs an error "GeoEntities::timeout: A network operation for GeoEntities timed out. Please try again later." The same issue with "Ukraine". $\endgroup$
    – user64494
    Commented Oct 16, 2022 at 17:01

2 Answers 2

6
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Notice how the Amritsar region touches the border to Pakistan:

GeoGraphics[{Red, EdgeForm[Blue], 
 Polygon[Entity["City", {"Amritsar", "Punjab", "India"}]]}, 
 PlotRangePadding -> Scaled[.25]
]

enter image description here

For this reason I think we need to use the option "FullyContained" -> True in GeoEntities.

TakeLargest[
  EntityValue[
    GeoEntities[Entity["Country", "Pakistan"], "City", "FullyContained" -> True], 
    "Population", "EntityAssociation"], 20]

enter image description here


Notice similar behavior in GeoWithinQ:

GeoWithinQ[
  Entity["Country", "Pakistan"], 
  Entity["City", {"Amritsar", "Punjab", "India"}]
]
True
GeoWithinQ[
  Entity["Country", "Pakistan"], 
  Entity["City", {"Amritsar", "Punjab", "India"}], 
  "FullyContained" -> True
]
False
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3
  • $\begingroup$ Thanks @GregHurst. I learned something new. So it is not a bug? How do I know when to use this option? $\endgroup$
    – Syed
    Commented Oct 17, 2022 at 12:50
  • $\begingroup$ I'm not sure if it's a bug or not... With the same logic since India touches Pakistan one might think it should be returned in this call, which it's not: GeoEntities[Entity["Country", "Pakistan"], "Country"]. $\endgroup$
    – Greg Hurst
    Commented Oct 17, 2022 at 12:55
  • 1
    $\begingroup$ If I had to guess: this is probably a bug and the "FullyContained" option is mainly meant for features that can span multiple geographic regions, like lakes, rivers, etc. $\endgroup$
    – Greg Hurst
    Commented Oct 17, 2022 at 12:57
2
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Seems to be an issue with GeoEntities. EntityClass does not have this issue and can be used as a workaround.

EntityValue[
 EntityClass[
  "City", {EntityProperty["City", "Country"] -> Entity["Country", "Pakistan"], 
   EntityProperty["City", "Population"] -> TakeLargest[20]}],
 EntityProperty["City", "Population"], "EntityAssociation"]
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