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Geo Centroid Aggregation Usage
editGeo Centroid Aggregation Usage
editA metric aggregation that computes the weighted centroid from all coordinate values for a Geo-point datatype field.
Be sure to read the Elasticsearch documentation on Geo Centroid Aggregation
Fluent DSL example
edita => a .GeoCentroid("centroid", gb => gb .Field(p => p.LocationPoint) )
Object Initializer syntax example
editnew GeoCentroidAggregation("centroid", Infer.Field<Project>(p => p.LocationPoint))
Example json output.
{ "centroid": { "geo_centroid": { "field": "locationPoint" } } }
Handling Responses
editresponse.ShouldBeValid(); var centroid = response.Aggregations.GeoCentroid("centroid"); centroid.Should().NotBeNull(); centroid.Count.Should().BeGreaterThan(0); centroid.Location.Should().NotBeNull(); centroid.Location.Latitude.Should().NotBe(0); centroid.Location.Longitude.Should().NotBe(0);
Geo Centroid Sub Aggregation
editThe geo_centroid
aggregation is more interesting when combined as a sub-aggregation to other bucket aggregations
Fluent DSL example
edita => a .Terms("projects", t => t .Field(p => p.Name) .Aggregations(sa => sa .GeoCentroid("centroid", gb => gb .Field(p => p.LocationPoint) ) ) )
Object Initializer syntax example
editnew TermsAggregation("projects") { Field = Infer.Field<Project>(p => p.Name), Aggregations = new GeoCentroidAggregation("centroid", Infer.Field<Project>(p => p.LocationPoint)) }
Example json output.
{ "projects": { "terms": { "field": "name" }, "aggs": { "centroid": { "geo_centroid": { "field": "locationPoint" } } } } }
Handling Responses
editresponse.ShouldBeValid(); var projects = response.Aggregations.Terms("projects"); foreach (var bucket in projects.Buckets) { var centroid = bucket.GeoCentroid("centroid"); centroid.Should().NotBeNull(); centroid.Count.Should().BeGreaterThan(0); centroid.Location.Should().NotBeNull(); centroid.Location.Latitude.Should().NotBe(0); centroid.Location.Longitude.Should().NotBe(0); }
Fluent DSL example
edita => a .GeoCentroid("centroid", gb => gb .Field(p => p.LocationPoint) )
Object Initializer syntax example
editnew GeoCentroidAggregation("centroid", Infer.Field<Project>(p => p.LocationPoint))
Example json output.
{ "centroid": { "geo_centroid": { "field": "locationPoint" } } }
Handling Responses
editresponse.ShouldBeValid(); var centroid = response.Aggregations.GeoCentroid("centroid"); centroid.Should().NotBeNull(); centroid.Count.Should().Be(0);