Difference between revisions of "NASA GSFC DISC Web Coverage Service for OMI NO2"
From Earth Science Information Partners (ESIP)
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==Purpose== | ==Purpose== | ||
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Access to satellite data using queries over a continuous space-time-parameter domain. | Access to satellite data using queries over a continuous space-time-parameter domain. | ||
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Version 0.1.a | Version 0.1.a | ||
| − | Prepared by: | + | Prepared by:<br> |
| − | Stefan Falke | + | Stefan Falke<br> |
Washington University and | Washington University and | ||
Northrop Grumman IT - TASC | Northrop Grumman IT - TASC | ||
| − | Wenli Yang | + | Wenli Yang<br> |
NASA GSFC | NASA GSFC | ||
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created: February 26, 2007 | created: February 26, 2007 | ||
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Short name: GSFC DISC WCS | Short name: GSFC DISC WCS | ||
| − | Long name: Air quality user-access to | + | Long name: Air quality user-access to OMI NO2 data using a WCS |
==Use Case Definition== | ==Use Case Definition== | ||
| − | The | + | The purpose of this use case is to expose data stored in the NASA GSFC DISC via OGC services to increase the discovery, access, and use of these data holdings by air quality scientists, researchers, managers, and those in NASA’s partner organizations. |
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===Actors=== | ===Actors=== | ||
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===Preconditions=== | ===Preconditions=== | ||
| − | *1. | + | *1. OMI NO2 data are available through open interfaces |
*2. Data access service specifications, e.g. OGC Web Coverage Service (WCS), can be implemented by data provider or mediator | *2. Data access service specifications, e.g. OGC Web Coverage Service (WCS), can be implemented by data provider or mediator | ||
| − | *3. | + | *3. "Pre-processing", such as mosaicking and subsetting can be conducted to prepare the OMI NO2 data for WCS access. |
===Postconditions=== | ===Postconditions=== | ||
| − | *1. | + | *1. Access of OMI NO2 data in a numeric format (as opposed to image format) covering the spatial area, time range, and parameters that were specified in the query. |
===Normal Flow (Process Model)=== | ===Normal Flow (Process Model)=== | ||
| − | *1) The user | + | *1) The user discovers the OMI NO2 WCS |
*2) The user submits a WCS GetCoverage request that includes bounding box, time, and parameter filters | *2) The user submits a WCS GetCoverage request that includes bounding box, time, and parameter filters | ||
| − | *3) The | + | *3) The GSFC DISC provides the data that meets the query criteria. In the process, the data provider may need to execute swath mosaicking and data subsetting services. |
===Alternative Flows=== | ===Alternative Flows=== | ||
===Successful Outcomes=== | ===Successful Outcomes=== | ||
| − | *1.Operation succeeds and user obtains | + | *1.Operation succeeds and user obtains OMI NO2 data adhering to the requested spatial, temporal, and parameter filters. |
===Failure Outcomes=== | ===Failure Outcomes=== | ||
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===Participating Organizations/Projects=== | ===Participating Organizations/Projects=== | ||
| + | |||
| + | *NASA GSFC DISC | ||
| + | *Washington University in St. Louis | ||
| + | *NASA GIO | ||
===Technology A=== | ===Technology A=== | ||
| + | |||
| + | *OGC Web Coverage Service (WCS) | ||
====Description==== | ====Description==== | ||
Latest revision as of 12:51, February 27, 2007
Use Case AQ.SatelliteData.1.b
Purpose
Access to satellite data using queries over a continuous space-time-parameter domain.
Revision Information
Version 0.1.a
Prepared by:
Stefan Falke
Washington University and
Northrop Grumman IT - TASC
Wenli Yang
NASA GSFC
created: February 26, 2007
Revision History
Modified by <Modifier Name/Affil>, <Date/time>, <Brief Description>
Use Case Identification
Use Case Designation
AQ.SatelliteData.1.b
Use Case Name
Short name: GSFC DISC WCS
Long name: Air quality user-access to OMI NO2 data using a WCS
Use Case Definition
The purpose of this use case is to expose data stored in the NASA GSFC DISC via OGC services to increase the discovery, access, and use of these data holdings by air quality scientists, researchers, managers, and those in NASA’s partner organizations.
Actors
Primary Actors
Air quality analysts interested in using satellite data for assessing air pollution, comparing satellite and surface data, "ground-truthing" model results.
Other Actors
Preconditions
- 1. OMI NO2 data are available through open interfaces
- 2. Data access service specifications, e.g. OGC Web Coverage Service (WCS), can be implemented by data provider or mediator
- 3. "Pre-processing", such as mosaicking and subsetting can be conducted to prepare the OMI NO2 data for WCS access.
Postconditions
- 1. Access of OMI NO2 data in a numeric format (as opposed to image format) covering the spatial area, time range, and parameters that were specified in the query.
Normal Flow (Process Model)
- 1) The user discovers the OMI NO2 WCS
- 2) The user submits a WCS GetCoverage request that includes bounding box, time, and parameter filters
- 3) The GSFC DISC provides the data that meets the query criteria. In the process, the data provider may need to execute swath mosaicking and data subsetting services.
Alternative Flows
Successful Outcomes
- 1.Operation succeeds and user obtains OMI NO2 data adhering to the requested spatial, temporal, and parameter filters.
Failure Outcomes
- 1.
- 2.
Special Functional Requirements
None
Extension Points
Diagrams
Use Case Diagram
State Diagram (optional)
Activity Diagram (optional)
Other Diagrams (optional)
Non-Functional Requirements (optional)
Performance
Reliability
Scalability
Usability
Security
Other Non-functional Requirements
Selected Approach
Overall Technical Approach
Architecture
Participating Organizations/Projects
- NASA GSFC DISC
- Washington University in St. Louis
- NASA GIO
Technology A
- OGC Web Coverage Service (WCS)
