[seek-dev] ecogrid query

Thu Jul 22 10:43:29 PDT 2004

This is the approach we are taking here at LNO for our local data 
holdings - mostly remote sensing imagery - a combined metacat for 
metadata/SRB for data objects solution. Hope to have it in place this fall.

James

David Stockwell wrote:

>>
>>
>> Another option is to load EML metadata describing
>> the data into the KNB metacat, and then point that at the data objects
>> in the SRB. 
> 
> 
> This sounds like a good option. The metadata is a used in the Global 
> Ecosystems CDs and
> would be best to accommodate it.  An example is listed below.  Who do I 
> call now?
> 
> file title  : Olson World Ecosystems Version 1.3A
> data type   : byte
> file type   : binary
> columns     : 720
> rows        : 360
> ref. system : lat/long
> ref. units  : deg
> unit dist.  : 1.0000000
> min. X      : -180.0000000
> max. X      : 180.0000000
> min. Y      : -90.0000000
> max. Y      : 90.0000000
> pos'n error : unknown
> resolution  : 0.5000000
> min. value  : 0
> max. value  : 29
> value units : classes
> value error : unknown
> flag value  : none
> flag def'n  : none
> legend cats : 30
> category  0 : 0 OCEAN/SEA Oceans, Seas (including Black Sea)
> category  1 :  1 CONIFOR  Conifer Forest
> category  2 :  2 BRODLFOR Broadleaf Forest: temperate, subtropical drought
> category  3 :  3 MIXEDFOR Mixed Forest: conifer/broadleaf; so. Boreal
> category  4 :  4 GRASSHRB Grassland +/- Shrub or Tree
> category  5 :  5 TROPICFR Tropical/subtr. Forest: montane, seasonal, 
> rainforest
> category  6 :  6 SCRUBWDS Scrub +/- Woodland &/or fields (evergreen/decid.)
> category  7 :  7 SEMIDTUN Semidesert shrub/steppe; Tundra (polar, alpine)
> category  8 :  8 FLDWDSAV Field/Woods complex &/or Savanna, tallgrass
> category  9 :  9 NORTAIGA Northern Boreal Taiga woodland/tundra
> category 10 : 10 FORFDREV Forest/Field; Dry Evergreen broadleaf woods
> category 11 : 11 WETLAND  Wetlands: mires (bog/fen); marsh/swamp +/- 
> mangrove
> category 12 : 12 DESERTS  Desert: bare/alpine; sandy; salt/soda
> category 13 : 13 SHRBTRST Shrub/Tree: succulent/thorn
> category 14 : 14 CROPSETL Crop/Settlement (irrigated or not)
> category 15 : 15 CONIFRFC Conifer snowy Rainforest, coastal     category 
> 16 : 16          not used
> category 17 : 17          not used
> category 18 : 18          not used
> category 19 : 19 MANGROVE Mangrove/wet forest/thicket + tidal flat
> category 20 : 20 WALANCST Water (~51-90%) & Land, Coast/hinterland 
> complexes
> category 21 : 21          not used
> category 22 : 22          not used
> category 23 : 23 ISLFRING Island or Fringe land (91-99% water)
> category 24 : 24 LANDWATR Land/Water (~21-50%) complexes       category 
> 25 : 25 ICE      Ice: Glaciers & emerging rocks near fringe
> category 26 : 26 POLARDES Polar Desert
> category 27 : 27 WTNDMHTH Wooded Tundra Margin; Heath/moorland
> category 28 : 28          not used
> category 29 : 29 INLDWATR Inland Water bodies (including Caspian Sea)
> comment     : 14 Major Ecosystem classes and 8 fringe classes, plus Ocean
> lineage     : Derived from WE1.4D by aggregating classes to .5-degree
> completeness: .5-degree coverage complete for land areas, based on WE1.4D
> consistency : All values represent spatial dominance at .5-degree
> 
> 
> 
> 
> Arcot Rajasekar wrote:
> 
>> Matt
>>     I like the approach of a separate metadata respository wityh links
>> to an object repository. But if the metadata is not in EML then we may
>> have to do some other metadata repository possibly MCAT.
>>
>>  thanks
>> raja
>>
>> On Thu, 22 Jul 2004, Matt Jones wrote:
>>
>>  
>>
>>> Hi David,
>>>
>>> You can query using the existing ecogrid interfaces, but only against
>>> the metadata that is available for the data source.  By default, SRB
>>> doesn't have much contextual metadata.  I've talked with Raja about
>>> modifying SRB to accept an EML description of the data and load that
>>> into the extended metadata for the dataset, but that hasn't been done
>>> yet as far as I know.  Another option is to load EML metadata describing
>>> the data into the KNB metacat, and then point that at the data objects
>>> in the SRB.  Then, searching the EcoGrid will find metadata records in
>>> one system that point at data objects in abother system.  But you'd be
>>> able to search the much more comprehensive EML metadata.
>>>
>>> If you have metadata you want to query, you can use the QueryBuilder to
>>> construct a query, but it is intended as a developer's tool for testing,
>>> not an end-user tool.  Steve Tekell is designing and implementing a
>>> web-based query app for EcoGrid targeted at scientists.  When finished,
>>> it will be installed as part of the SEEK web site.  Until then, Rod's
>>> tool and the commandline client are your options for submitting a query.
>>>  There is an extremely simple query tool prototype in Kepler, but right
>>> now it only searches the KNB Ecogrid node.
>>>
>>> Matt
>>>
>>> David Stockwell wrote:
>>>   
>>>
>>>> Hi,
>>>> We are at the point now where we would like to query
>>>> the metadata on our datasets to return a list of those of interest,
>>>> for further processing.  Could anyone suggest how we might
>>>> use the ecogrid to say, query for all datasets that concern climate?
>>>> Is this something I can use the QueryBuilder for Rod?
>>>> Cheers
>>>>
>>>> _______________________________________________
>>>> seek-dev mailing list
>>>> seek-dev at ecoinformatics.org
>>>> http://www.ecoinformatics.org/mailman/listinfo/seek-dev
>>>>     
>>>
>>>   
> 
> 
> 

-- 
James W. Brunt
Associate Director for Information Management
Long Term Ecological Research Network Office
Department of Biology
University of New Mexico
Albuquerque, NM 87131-1091
505 272 7085
jbrunt at lternet.edu