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https://issues.apache.org/jira/browse/LUCENE-7906?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ignacio Vera updated LUCENE-7906:
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Attachment: test-degenerate_point.patch
I think I found an issue with degenerate geopoints. If the degenerate Geopoint
lays on the boundary of a shape, the relationships between the objects are not
symetrical:
The bounding box thinks it contains the degenerated point.
The degenerated point thinks it intersects the shape.
Not sure what is the right answer:
If the answer is WITHIN/CONTAINS: Method intersects(Plane plane, ....) should
always return false.
If the answer is OVERLAPS/OVERLAPS: Method intersects(GeoShape geoShape) should
pass a plane for a degenerated GeoPoint. In this case I think we should
consider creating a Geoshape containing a point and the plane.
Thanks,
I.
> Spatial relationship between Geoshapes
> --------------------------------------
>
> Key: LUCENE-7906
> URL: https://issues.apache.org/jira/browse/LUCENE-7906
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/spatial3d
> Reporter: Ignacio Vera
> Assignee: Karl Wright
> Attachments: LUCENE-7906-AreaShape.patch, LUCENE-7906.patch,
> test-degenerate_point.patch
>
>
> Hi,
> Working with geosahpes and trying to resolve spatial relationships between
> them I came accross a big limitation when trying to solve the relationship
> between two geopolygons. This object does not expose the internal structure.
> In particular at some point, it is necessary to check if one polygon
> intersects the edges of the other polygon which currently is not possible as
> edges are not exposed.
> To be able to perform such operation it can be several options. The ones I
> can think of are:
> 1) Expose the edges of the polygon ( and probably the notable points for the
> edges) adding getters in the GeoPolygon interface. Easy to implement and
> leave users the responsability of coding the spatial relationship.
> 2) Extends GeoPolygon interface to extends geoarea and leave the object make
> the spatial relationship.
> 3) Extends GeoShape interface so all shapes can infer the spatial
> relationship with other GeoShapes.
> I might be bias as my interest is in 2d Shapes in the unit sphere and there
> might be some cases which what I propose cannot be implemented or are againts
> the aim of the library.
> What do you think?
> Cheers,
> Ignacio
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