Changes between Version 10 and Version 11 of markhDataModelDrafting


Ignore:
Timestamp:
01/23/14 00:51:17 (6 years ago)
Author:
markh
Comment:

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  • markhDataModelDrafting

    v10 v11  
    4040 * climatology
    4141  * valid for: ''dimension coordinate'', ''auxiliary coordinate''
    42 
    43 
     42 * bounds
     43  * valid for: ''dimension coordinate'', ''auxiliary coordinate''
     44 * cell_measures
     45  * valid for: ''field''
     46 * cell_methods
     47  * valid for: ''field''
     48 * climatology
     49  * valid for: ''dimension coordinate'', ''auxiliary coordinate''
     50 * Conventions
     51  * valid for: ''field''
     52 * featureType
     53  * valid for: ''field''
     54  * This attribute has associated conventions which provide a way of packing multiple fields of the same kind of discrete sampling geometry (timeseries, trajectories, etc.) into a single CF-netCDF data variable, in order to save space, since a multidimensional representation with common coordinate variables is typically very wasteful in such cases. This is a kind of compression. The data model regards each instance of the feature type as an independent field construct. The featureType attribute is a property of each of these field constructs.
    4455
    4556 * The attributes
     
    5566 * of data variables specify how missing data is indicated in the data array. This data model supports the idea of missing data, but does not depend on any particular method of indicating it.
    5667 * These attribute names are not part of the data model and should not be used except in CF-NetCDF.
    57  * ''question: is this the case for coords too, auxiliary coords may contain missing data, I believe?''
     68
     69  ''question: is this the case for coords too, auxiliary coords may contain missing data, I believe?''
    5870
    5971 * The attributes
     
    6779 * These attribute names are not part of the data model and should not be used except in CF-NetCDF.
    6880
    69  * The attribute:
    70   * featureType
    71  * and associated conventions provide a way of packing multiple fields of the same kind of discrete sampling geometry (timeseries, trajectories, etc.) into a single CF-netCDF data variable, in order to save space, since a multidimensional representation with common coordinate variables is typically very wasteful in such cases. This is a kind of compression. The data model regards each instance of the feature type as an independent field construct. The featureType attribute is a property of each of these field constructs.
    72 
    73 ~~The attributes:
    74  * bounds
    75  * cell_measures
    76  * cell_methods
    77  * climatology
    78  * Conventions
    79  * coordinates
    80  * formula_terms
    81  * grid_mapping
    82 have various special or structural functions in the CF-netCDF file format. Their functions and the relationships they indicate are reflected in the structure of this data model.  These attributes do not correspond to properties in the data model and should not be used ouside the context of CF-NetCDF. ~~
     81 * The attributes:
     82  * coordinates
     83  * formula_terms
     84  * grid_mapping
     85 * have various special or structural functions in the CF-netCDF file format. Their functions and the relationships they indicate are reflected in the structure of this data model, but not using these names. 
     86 * These attributes do not correspond to properties in the data model and should not be used ouside the context of CF-NetCDF. ~~
    8387
    8488
    8589The CF data model allows field, dimension and auxiliary coordinate constructs to have other properties not defined by CF, provided they do not conflict with CF. Since they are not part of the CF standard, the data model does not provide any interpretation of them.
    86 ''Question: can cell_measures, cell_methods use non-conflicting attributes?''
    8790
     91  ''Question: can cell_measures, cell_methods use non-conflicting attributes?''
     92
     93
     94#####################################################################################################
    8895
    8996=== !CellMeasure ===