2010-08-27: Virtual Workshop WCS Implementation
Introduction
Who is this workshop for? Anyone interested in:
- Making their data more widely accessible
- Using standard tools and catalogs instead of custom-made
- Need help adding a standard interface to data
Participants in this workshop may have varied backgrounds on web services (from novice to expert). The varied experience will allow participants to form mentor relationships.
Problem: Data is distributed, in different formats and can't be accessed by common tools within the AQ Community
Solution: Create a standard interface to the data using OGC Web Coverage Service
In-depth Details (programmers?)
Case studies of how Data Systems Implemented WCS:
- DataFed
- DLR
- Giovanni/NASA
- RSIG
- Airnow
- Univ. of New Mexico
How-To
Questions about WCS
What WCS questions/issues have you encountered? If you know the answer to these questions please respond below the question with ** and add your name.
Questions from Steve Ludewig, Sonoma Tech
- The WCS protocol – how can/should it be extended for air quality
- How should we handle different or even multiple parameter requests? (separate arguments? Lists as arguments?)
- Duration codes?
- Parameter occurrence codes (POC)?
- Time_Sequence: Ours currently is a single date/time -- should it accommodate a time range (performance is a concern)? What time standard? (UTC?)
- Use of an API key for authentication.
- Output (payload) formats
- Field naming
Implementation of WCS
- NetCDF -> WCS
- Minnesota Maps WCS
Testing Services
- WCS Service Tester - Tests DescribeCoverage and GetCapabilities
- OGC Test Engine
- Previous Service Interop Tests
Outcome
List your server here if you have a WCS implementation.
- Available services
- DataFed - Passed GetCap/DescribeCoverage
- Base URL http://webapps.datafed.net/AERONETd.ogc
- Tested Coverage: COVERAGE=AOT_1020
- RSIG - Passed
- Base URL http://badger.epa.gov/rsig/rsigserver
- Tested Coverage: COVERAGE=airnow.pm25
- DLR - Passed GetCapabilities/DescribeCoverage
- Base URL http://wdc.dlr.de/cgi-bin/gome2_o3_w.cgi
- Tested Coverage: coverage=GOME2_O3
Participants
Next to your name add if you are looking for guidance or have implemented a successful WCS and could provide guidance
Next Workshop
We will continue the discussion on WCS in telecon/webex form in 6 weeks. In hopes that the information gained from this session can be implemented/tested and we can move forward with a set of interoperable web services.