Creates an upload session to start uploading photo bytes. The method uses the upload URL of the returned UploadRef to upload the bytes for the Photo. In addition to the photo requirements shown in https://support.google.com/maps/answer/7012050?ref_topic=6275604, the photo must meet the following requirements: * Photo Sphere XMP metadata must be included in the photo metadata. See https://developers.google.com/streetview/spherical-metadata for the required fields. * The pixel size of the photo must meet the size requirements listed in https://support.google.com/maps/answer/7012050?ref_topic=6275604, and the photo must be a full 360 horizontally. After the upload completes, the method uses UploadRef with CreatePhoto to create the Photo object entry.
Request body
A generic empty message that you can re-use to avoid defining duplicated empty messages in your APIs. A typical example is to use it as the request or the response type of an API method. For instance: service Foo { rpc Bar(google.protobuf.Empty) returns (google.protobuf.Empty); }
Response
Successful response