$geoWithin query fail to retrieve point included in the queried polygon - mongodb

Question

I'm trying to query a document using its location with two polygons that are quite similar. Both includes the location of the document but one finds it and the other not. I thought that this was related to "big polygons" but I managed to reduce the polygons enough to rule out this possibility. See previous post. Any idea explaining such a difference?
Playground: https://mongoplayground.net/p/sTEtYD3HU8m:
Document:
{
"_id": {
"$oid": "63ef9379e671073bfb963145"
},
"geometry": {
"type": "Point",
"coordinates": [
2.834,
47.264
]
},
"_class": "org.example.springdatamongodbgeowithinissue.model.SamplingGeometry"
}
Is not in search results for this polygon:
{
"geometry": {
"$geoWithin": {
"$geometry": {
"type": "Polygon",
"coordinates": [
[
[
-16.1,
49.12
],
[
-16.1,
46.156
],
[
16.1,
46.156
],
[
16.1,
49.12
],
[
-16.1,
49.12
]
]
]
}
}
}
}

Answer 1

Still the same issue with Earth's curvature. Your area is long enough to take it into account:
zooming in and's clearly outside:
The map: https://jsfiddle.net/blex18/w9g4bzyk/1/
var map = new google.maps.Map(document.body, {zoom:5,center:{lat:47.264,lng:2.834}});
new google.maps.Polygon({geodesic:true,map:map,geodesic:true,
path:[
{lat:49.12,lng:-16.1},
{lat:46.156,lng:-16.1},
{lat:46.156,lng:16.1},
{lat:49.12,lng:16.1},
{lat:49.12,lng:-16.1}]});
new google.maps.Marker({
position: {lat:47.264,lng:2.834},
map,
title: "Here",
});