Geo-Radius Query

A query that matches documents with geo point within the radius of provided geo point.

Proto definition:

message GeoRadiusQuery {
    string field = 1; // Field in the document to query
    google.type.LatLng center = 2; // target center geo point to calculate distance
    string radius = 3; // distance radius  like "12 km". supports m, km and mi, default to m
}