class LandDocument(DocType):

    city = fields.StringField()
    latitude = fields.FloatField()
    longitude = fields.FloatField()

    location = fields.GeoPoint()

    def find_near_by(self, distance=5000):
        return self.search().filter(
            'geo_distance', distance=f'{distance}m', location={
                'lat': self.latitude,
                'lon': self.longitude
             }
         )