Difference between revisions of "AQ Community Metadata Discussion"
From Earth Science Information Partners (ESIP)
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* issue: same parameter can come in different units (e.g. surface ozone in ug/m3 or ppb) - "units" is a separate facet, so it is possible to make selection if two variants of the same data are on offer | * issue: same parameter can come in different units (e.g. surface ozone in ug/m3 or ppb) - "units" is a separate facet, so it is possible to make selection if two variants of the same data are on offer | ||
* rerlation to CF standard_name: parameter name should be extract from standard_name describing the physical quantitiy without its representation | * rerlation to CF standard_name: parameter name should be extract from standard_name describing the physical quantitiy without its representation | ||
| + | |||
| + | == Units == | ||
== Platform == | == Platform == | ||
| − | * predefined values: satellite, surface | + | * predefined values: satellite, surface station, sonde, aircraft, model, emission (/!\ CHANGED) -- check common data model; climate community |
| + | * Lorenzo: look at evolution of standard where these problems are dealt with (platform and geometry); can we adopt their language | ||
| + | |||
| + | == new facet: Geometry or FeatureType == | ||
| + | |||
| + | * see also CF featureType; climate science markup language (CSML 3 writeup) | ||
| + | * time series (=point), vertical profile, layer, column, multi-dimensional (=gridded), trajectory | ||
| + | |||
| + | == DataType == | ||
| + | |||
| + | * unclear | ||
| + | |||
== Instrument == | == Instrument == | ||
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* describes processing of data along any dimension. See cell_methods attributes in CF convention and follow same syntax. See [http://cf-pcmdi.llnl.gov/documents/cf-conventions/1.1/ch07s03.html] | * describes processing of data along any dimension. See cell_methods attributes in CF convention and follow same syntax. See [http://cf-pcmdi.llnl.gov/documents/cf-conventions/1.1/ch07s03.html] | ||
| + | |||
| + | == Originator == | ||
| + | |||
| + | * only lists originator short name | ||
| + | |||
| + | == Data Distributor == | ||
| + | |||
| + | * only lists distributor short name | ||
| + | |||
| + | == Space == | ||
| + | |||
| + | * bounding box | ||
| + | |||
| + | == resurrect facet: vertical (rename to "vertical_extent"?) == | ||
| + | |||
| + | * range with fixed keywords: surface, troposphere, stratosphere, mesosphere, whole atmosphere | ||
| + | |||
| + | == Time == | ||
| + | |||
| + | * min-max; allows for "now" | ||
Revision as of 04:33, August 25, 2011
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| Workshops | Air Quality Data Network
Dataset
- generally: data from one provider, one (satellite) instrument or one model.
- Need to further clarify granularity for model data. For example: "MACC" or "MACC forecast" and "MACC reanalysis"
Parameter
- relatively clear (= "variable name", "field name" or "layer name")
- issue: same parameter can come in different units (e.g. surface ozone in ug/m3 or ppb) - "units" is a separate facet, so it is possible to make selection if two variants of the same data are on offer
- rerlation to CF standard_name: parameter name should be extract from standard_name describing the physical quantitiy without its representation
Units
Platform
- predefined values: satellite, surface station, sonde, aircraft, model, emission (/!\ CHANGED) -- check common data model; climate community
- Lorenzo: look at evolution of standard where these problems are dealt with (platform and geometry); can we adopt their language
new facet: Geometry or FeatureType
- see also CF featureType; climate science markup language (CSML 3 writeup)
- time series (=point), vertical profile, layer, column, multi-dimensional (=gridded), trajectory
DataType
- unclear
Instrument
- new tag for method should be added
- instrument tag may not be available in some services and will get lost in aggregation
- present agreement on "coarse resolution catalogue" would not allow mapping of intrument and method as it will not go down to the level of individual stations
- use "instrument" also for "modelname" (rename facet to "instrument_modelname"?)
Domain
- remove this facet
Topic Category
- comes from ISO
Time Resolution
- rename to "Sample_Length"
- Tim Dye to sort this out...
new facet: Periodicity
- add "irregular" as value
new facet: Time zone
new facet: Time definition
new facet: cell_methods
- describes processing of data along any dimension. See cell_methods attributes in CF convention and follow same syntax. See [1]
Originator
- only lists originator short name
Data Distributor
- only lists distributor short name
Space
- bounding box
resurrect facet: vertical (rename to "vertical_extent"?)
- range with fixed keywords: surface, troposphere, stratosphere, mesosphere, whole atmosphere
Time
- min-max; allows for "now"
