code: def lonlat_point(self, lon, lat):
          
          self._set_query(self.spatial_query, longitude=lon, latitude=lat)
          return self
docs: Add a latitude/longitude point to the query.
  
          This adds a request for a (`lon`, `lat`) point. This modifies the query
          in-place, but returns `self` so that multiple queries can be chained together on
          one line.
  
          This replaces any existing spatial queries that have been set.
  
          Parameters
          ----------
          lon: float
              The longitude to request
          lat : float
              The latitude to request
  
          Returns
          -------
          self : DataQuery
              Returns self for chaining calls