Abstract
Recent advances in Sensor Web geospatial data capture, such as high-resolution in satellite imagery and Web-ready data processing and modeling technologies, have led to the generation of large numbers of datasets from real-time or near real-time observations and measurements. Finding which sensor or data complies with criteria such as specific times, locations, and scales has become a bottleneck for Sensor Web-based applications, especially remote-sensing observations. In this paper, an architecture for use of the integration Sensor Observation Service (SOS) with the Open Geospatial Consortium (OGC) Catalogue Service-Web profile (CSW) is put forward. The architecture consists of a distributed geospatial sensor observation service, a geospatial catalogue service based on the ebXML Registry Information Model (ebRIM), SOS search and registry middleware, and a geospatial sensor portal. The SOS search and registry middleware finds the potential SOS, generating data granule information and inserting the records into CSW. The contents and sequence of the services, the available observations, and the metadata of the observations registry are described. A prototype system is designed and implemented using the service middleware technology and a standard interface and protocol. The feasibility and the response time of registry and retrieval of observations are evaluated using a realistic Earth Observing-1 (EO-1) SOS scenario. Extracting information from SOS requires the same execution time as record generation for CSW. The average data retrieval response time in SOS+CSW mode is 17.6% of that of the SOS-alone mode. The proposed architecture has the more advantages of SOS search and observation data retrieval than the existing sensor Web enabled systems.
| Original language | English |
|---|---|
| Pages (from-to) | 360-372 |
| Number of pages | 13 |
| Journal | Computers and Geosciences |
| Volume | 35 |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 2009 |
| Externally published | Yes |
Funding
This work was supported by grants from the US NASA ESTO/AIST Sensor Web program “A General Framework and System Prototypes for the Self-Adaptive Earth Predictive Systems (SEPS)—Dynamically Coupling Sensor Web with Earth System Models” (No. NNX06AG04G, PI: Dr. Liping Di), China 863 program (No. 2007AA12Z230, PI: Dr. Nengcheng Chen) and the NSFC program (No. 40501059, PI: Dr. Nengcheng Chen). We sincerely thank our colleague, Dr. Barry Schlesinger, for proofreading the manuscript. The authors would like to thank Dr. Simon Cox and the anonymous reviewer for their valuable comments and insightful ideas.
| Funders | Funder number |
|---|---|
| National Aeronautics and Space Administration |
Keywords
- CSW
- Earth observation
- Registry
- Sensor Web
- Sensor observation service