Presentation on theme: "Chart-o-Mat ICG-WIGOS TT on Metadata Management of Station Metadata at Deutscher Wetterdienst (DWD) Rainer März Section Administration of Observing Networks."— Presentation transcript:
Chart-o-Mat ICG-WIGOS TT on Metadata Management of Station Metadata at Deutscher Wetterdienst (DWD) Rainer März Section Administration of Observing Networks
Geneva, March 11, 2013 Principles for Metadata at DWD Metadata is stored together with observing data in one database Project MIRAKEL started around 1995 for CDC + GPCC All conditions are valid for a specific time-range (from – until) Integration of Metadata from other organisations Flexible Import/Export for future needs Semi-automatic update and quality checking procedures All applications should benefit from the data (and use it)
Geneva, March 11, 2013 Amount of station Metadata Overview of the contents [count of largest categories in thousands]: WMO Main Stations (GSN, RBSN, RBCN ….) Airports (with ICAO loc.ind.) reporting METAR/SPECI German additional stations (voluntary, federal states) Related partners (roads, renewable energy ….) Voluntary observing ships and other marine vessels Additional GPCC stations of all countries Currently counting over all:
Geneva, March 11, 2013 Storage of Metadata / groups of tables Tables for metadata divided into : Basic Information meta tables; allowed values Joined Information intersection tables with validity dates (begin / end) Tables for observation data use the same unique station ID ! Staff Measuring condidions Station Pub9VolA Equipment
Geneva, March 11, 2013 Storage of Metadata / classes of information Main aspects of meta data storage: Main station table (name, start_date, end_date, status) IDs (WMO / ICAO / IATA / GPCC / Nat.Numbers …) Geographical (Lat./Lon., elevation, country, region, area etc.) Equipment Staff Operation and Production (programmes for encoding reports) Visits (Maintenance, Administrative) Representation (measuring conditions)
Geneva, March 11, 2013 Managing the Metadata Access and permits managed by database-roles 4 accounts with full access - Admin 10+ accounts to maintain general station changes (add, move, close) Approx. 100 accounts allow a restricted write-access Approx accounts have only read-permits (all users) Personalized data like bank accounts with restricted roles
Geneva, March 11, 2013 Updating and completing the Metadata Weekly import of Pub9VolA of WMO and semi-automatic changes Regional Network Groups report national changes to Offenbach and edit their local entries (persons, sensors, visits, history) Import of bilateral exchanged data with individual loading- procedures comparision with other sources when necessary (flagging of suspicious/unknown/inconsistent) GPCC maintains meta-data for non-WMO stations of other NMCs
Geneva, March 11, 2013 Typical trouble with metadata No information about changes at a station Inconsistency between dependent sources (i.e. elevation…) Lack of syncronization with Offline-procedures Especially Lat./Lon. different various formats (dez.,°,min/sec) 4 sources / 5 different values ;-) …. Which is the best Representation of a complicated history for a time-series standard exchange format + automated process is necessary!
Geneva, March 11, 2013 Stations operated by Deutscher Wetterdienst 4 Regional Oberserving Network Groups Hamburg, Potsdam, Offenbach, Munich 65 Stations with professional Observers, 35 occupied UTC, 30 only daytime 48 measuring radioactivity (air+precipitation) 28 RBSN Stations 11 Climate Reference (traditional equipment) 4 GSN-Stations (GCOS) 1 GUAN Station 1 GAW Station 114 Automated Weather Stations with full equipment 17 Weather Radar Stations 9 Aerological Stations (4 autolaunchers, 1 ozone) 4 Wind Profilers +34 Stations of Bundeswehr Geoinfo Service
Geneva, March 11, 2013 Additional Stations operated by DWD and Partners 1781 Voluntary Stations (climate; wind; precip), 1365 reporting online (24/1 reports per day) Ship-based: 740 Voluntary Observing Ships (VOS) 19 Ship (AWS) (24 reports/day) Last but not least …: 1292 Phenological Stations (observing plants) 1500 Partner stations (approx) (motorways, fed.states, wind-energy, (nuclear) power-plants, university, military)
Geneva, March 11, 2013 All 1018 GSN stations in WMO GCOS Basic Meta Data and availability of FM12/FM94 observations received in Offenbach Example
Geneva, March 11, 2013 Example Precip-Station and the surrounding presented in a tool of GPCC called Mirakel-Live There is still a lot of research necessary!
Geneva, March 11, 2013 Outlook WCDMP / Data rescue needs support CDC) national projects currently in progress: -> KliDaDigi for land stations -> HISTOR for ship logbooks Lots of undigitalized metadata from all German Stations +Electronical archives of BUFR since 1970s may be loaded Work for many years!
Geneva, March 11, 2013 QUESTIONS AND COMMENTS ? Thank you for your attention !