Result from Aggregation GeoBounds differ slightly from coordinates

superdaminou commented 10 months ago

Elasticsearch Version

8.4.1

Installed Plugins

No response

Java Version

bundled

OS Version

Windows 11 Professionnal Version 22H2 22621.2428

Problem Description

While trying to create an aggregation on a geo_point (same for geo_shape of type Point) the geobound aggregation doesn't return the correct value for a single point.

As a user with

an index with a geo_shape mapping
a single document
with a geo_point with following coordinates: [30.0, 10.0].

When i use the aggregation geo_bounds

Expected:

{
...
"aggregations": {
        "viewport": {
            "bounds": {
                "top_left": {
                    "lat": 10,
                    "lon": 30
                },
                "bottom_right": {
                    "lat": 10,
                    "lon": 30
                }
            }
        }
    }
}

Actual:

{
....
"aggregations": {
        "viewport": {
            "bounds": {
                "top_left": {
                    "lat": 9.999999990686774,
                    "lon": 29.999999972060323
                },
                "bottom_right": {
                    "lat": 9.999999990686774,
                    "lon": 29.999999972060323
                }
            }
        }
    }
  }

Steps to Reproduce

All of this is repoduced with the following docker image: docker.elastic.co/elasticsearch/elasticsearch:8.4.1. Same behaviour with docker.elastic.co/elasticsearch/elasticsearch:8.10.4

Create an index with geo_shape attribute

curl -XPUT localhost:9200/aggregation_test
{
"mappings": {
"properties": {
  "location": {
    "type": "geo_point"
  }
}
}

Insert a single POINT with simple coordinates

curl -XPUT localhost:9200/aggregation_test/_doc/1
{
"location" : {
"type" : "Point",
"coordinates" : 
  [30.0, 10.0 ]
}
}

Trying to aggregate with geo_bounds

curl -XPOST localhost:9200/aggregation_test/_search?size=0
{
"aggs": {
"viewport": {
  "geo_bounds": {
    "field": "location"
  }
}
}
}

Logs (if relevant)

No response

elasticsearchmachine commented 10 months ago

Pinging @elastic/es-analytics-geo (Team:Analytics)

iverase commented 1 month ago

This is actually expected and somewhat documented here https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-geo-bounding-box-query.html#_notes_on_precision. I think the only action to take here is to improve documentation so I will relabel this issue to docs.

elasticsearchmachine commented 1 month ago

Pinging @elastic/es-docs (Team:Docs)

elasticsearchmachine commented 1 month ago

Pinging @elastic/es-analytical-engine (Team:Analytics)

elastic / elasticsearch