Patent ID: 11874855
Assignee: COMPUTER NETWORK INFORMATION CENTER, CHINESE ACADEMY OF SCIENCES
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 6:
7. A parallel data access method based on data stored by the method according to claim 1, comprising:
1) receiving, by a back-end data service, a retrieval request initiated by a client, and retrieving all data blocks related to reading and writing in the metadata base according to the data identifier dataid in the retrieval request and a spatial range to be read and written, each data block being provided with a grid number;
2) determining, by the back-end data service, a specific access path of each data block according to the data identifier dataid and the grid number of the data block, and returning the specific access path to the client;
3) after receiving, by the back-end data service, a data parallel reading and writing request initiated by the client, performing projection transformation and resampling operations on the retrieved remote-sensing image according to parameters in the data parallel reading and writing request, wherein the client constructs the data parallel reading and writing request based on all access paths returned in the step 2), and the parameters in the data parallel reading and writing request comprise boundary range, projection transformation and resampling; and
4) performing, by the back-end data service, data cutting according to the parameters in the data parallel reading and writing request, and feeding a processing result back to the client.