Geo_shape: False positives when the polygon has aligned points

[franck.valentin (Franck)]

Hi,

I got false positives when searching intersections with a polygon that have aligned points:
For example, after indexing the following FeatureCollection (directly from Kibana):

    {
        "type": "FeatureCollection",
        "name": "testGeoJson_polygon1",
        "crs": {
            "type": "name",
            "properties": {
                "name": "urn:ogc:def:crs:OGC:1.3:CRS84"
            }
        },
        "features": [{
                "type": "Feature",
                "properties": {},
                "geometry": {
                    "type": "Polygon",
                    "coordinates": [[
    				[180.0, -36], 
    				[180, 90], 
    				[-180, 90], 
    				[-180, 79], 
    				[16, 58], 
    				[8, 13], 
    				[-180, 74], 
    				[-180, -85], 
    				[-180, -90], 
    				[180, -90], 
    				[180, -85], 
    				[26, 6], 
    				[33, 62], 
    				[180, -36]]]
                }
            }
        ]
    }

I get this result after filtering the data with a non intersecting box in the Atlantic ocean :

Note that filtering with a non intersecting box in the Indian ocean works correctly.

Now, the filtering is correct if I remove the point [-180, -85]. I've tried with other aligned points and got also incorrect results.
I couldn't see anywhere that geojson polygons with aligned points are invalid so I assume it's a bug from Elasticsearch/Lucene. Note also that I got the same error with ES6.2.3 and ES7.7

Is it really a bug or do I miss something?

Thanks!

[Ignacio_Vera]

Hi @franck.valentin,

I think it is a bug. Could you open an issue in the GitHub repository?

Thanks!

[franck.valentin (Franck)]

Hi Ignacio,

done: https://github.com/elastic/elasticsearch/issues/59386

Thanks!