def wait_completion(self):
        self.tasks.join()
Convert XYZ to mapnik.Envelope
dataset/ETHPy150Open Storj/dataserv-client/dataserv_client/control/Thread.py/ThreadPool.wait_completion--crossover with--dataset/ETHPy150Open springmeyer/tilelite/tilelite.py/SphericalMercator.xyz_to_envelope