1. Markus Heene, DWD markus.heene@dwd.de
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Markus Heene, DWD

2. Agenda Welcome How to start Analysis of GISC Offenbach search queries
Use cases for a search query
Digression – geoportal.org
Navigation
Summary
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3. How to start Geo: Rep. of Korea and SYNOP Create use cases
Analyze search behavior of the user based on anonymous log files
Geo: Rep. of Korea and SYNOP
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4. Full Text Search Full Text Search Geographical Search Terms
Cities: Offenbach, Vienna, Ankara, …
Countries: Germany, Austria, Turkey, …
Domain Terms
Tsunami, Precipitation, Temperature, Space Weather, Gust
Station IDs
TTAAiiCCCC
Output formats
NETCDF
JPG
Language Mix & Typos
German “Temperatur” vs. English “Temperature”
German “Vereisungsgefahr”
CLIAMTE
Almost no usage of wildcards like ‘*’ , ‘?’ or logical operators like ‘AND’ & ‘OR’
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5. Extended/Advanced Search, Expert Search & SRU
Geographical search
Keyword search
Abstract search
Title search
Data Provider – used by external source for monitoring
Expert Search
TTAAii Heavily used internally
SRU
Always used as full text search
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6. Search Examples Background Use Case – Search for city “Pljevlja”
5 operational GISCs with 3 different full text search engines
Use Case – Search for city “Pljevlja”
A user issued a search for “Pljevlja” and was wondering why she can not find her SYNOP products
Reason: Metadata contains “Pljevlja, “ and “,” was not registered as word separator in our Oracle Text Search
If you issued a search for “Pljevlja” at the 5 operational GISCs you had the following results:
3 GISCs with 4 hits, 1 GISC with 1 hit, 1 GISC with 0 hits; while all 5 GISCs contain the 4 metadata records
Use Case – Search for city “Bar”
A user issued a search for “Bar”
1 GISC 12 hits, 1 GISC 9 hits, 2 GISCs 5 hits, 1 GISC 2 hits
Reason:
1 GISC contains 3 additional records, which are not synchronized
1 GISC contains template metadata for “Marble bar” AMMC records
In 1 GISC records for “Marble bar” AMMC are not available
Information: 3 GISCs use the WMO Baseline metadata where records for AMMC are available
Use Case – Wild card search
A user issues a wild card search
3 GISCs do not support wild card search (at least I could not find in the documentation)
1 GISC uses ‘*’ and ‘?’ as wildcards while another GISC use ‘%’ and ‘_’ as wildcards
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7. Quality of Metadata
Even the best full text search can find only search criteria which are in the metadata
Example: Geneva Precipitation
Expected result: Main synoptic hour with a station in Geneva
Result: All 5 operational GISCs: 0 hits
Explanation:
In case of synoptic observation the WMO Baseline Metadata contain no information about the measured parameters. A SYNOP metadata record does not contain “domain terms” like: sun duration, precipitation, cloud cover, …
The station name is “GENEVE-COINTRIN”
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8. Digression – geoportal.org
Search in geoportal.org for “Pljevlja”  Result: 5 hits but only 4 metadata records
Search in geoprotal.org for “Geneva AND Precipitation”  Result: 85 hits but if I check samples for WDCGG “urn:x-wmo:md:jp.go.jma.wis.dcpc-wdcgg::p.NWR440N02.O3.NOAA “ Geneva is not in the record present
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9. Navigation - CMA
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10. Navigation - JMA
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11. Summary GISC Offenbach Search Use Cases
Users prefer full text search with search criteria like cities, countries and domain terms
Extended / Advanced search is used esp. to limit to certain data provider
SRU is only used in full text search
Search Use Cases
Different full text search engines generate on the same metadata basis different results
WMO Baseline metadata do not contain domain terms e.g. case of SYNOP
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12. Q&A
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