Changes between Version 3 and Version 4 of Grass7/TemporalExtension


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Timestamp:
Jul 6, 2011, 1:38:09 PM (13 years ago)
Author:
huhabla
Comment:

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  • Grass7/TemporalExtension

    v3 v4  
    5353The new spacetime datasets are handled like raster or vector maps. They are registered in mapset specific tables with creation and modification date and absolute/relative time stamp.
    5454
    55 === Raster spacetime datasets ===
     55=== Spacetime raster datasets ===
    5656
    57 The raster spacetime datasets store raster map specific attributes and metadata:
    58   * The spatial extent (e, w, n, s)
    59   * The temporal extent (start and end time or duration)
    60   * The data range (min and max)
     57The spacetime raster datasets have specific attribute which derived from the registered raster maps:
     58
     59  * The temporal type (absolute, relative)
     60  * The spatial extent computed from all registered raster maps (e, w, n, s)
     61  * The temporal extent computed from all registered raster maps  (start and end time or duration)
     62  * The data range computed from all registered raster maps (min and max)
     63  * The min and max NS resolution computed from all registered raster maps
     64  * The min and max EW resolution computed from all registered raster maps
    6165  * The raster datatype (CELL, FCELL, DCELL, MIXED)
     66  * temporal resolution
    6267
    6368All these table entries are computed or updated via trigger from all registered raster maps when maps are added or removed.
    … …  
    6570Table layout:
    6671
    67 The base spacetime tables are equal to the raster/vector and raster3d one.
     72The base and absolute/relative time spacetime tables are equal to the raster/vector and raster3d one.
    6873
    6974  * '''Spacetime metadata raster table'''
    7075    * '''id''' the name of the spacetime raster table
    71     * '''temporal type''' relative or absolute
    7276    * '''Raster register table name''' the name of the table storing the ids (names) of all registered raster maps
    7377    * '''spatial extent''' (4 columns: e, w, s,n) of all registered raster maps
    74     * '''temporal exten'''t of all registered raster maps
    75     * '''data range''' of all registered raster maps
     78    * '''data range''' min, max of all registered raster maps (2 columns)
     79    * '''Min Max resolution''' the min and max NS and EW resolution (4 columns)
    7680    * ...
    7781