Changes between Version 185 and Version 186 of WKTRaster/SpecificationWorking03


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Timestamp:
11/29/11 14:46:41 (13 years ago)
Author:
pracine
Comment:

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  • WKTRaster/SpecificationWorking03

    v185 v186  
    535535 * Idem for the raster_overview table.
    536536
    537 PostGIS is using the typmod feature of PostgreSQL to 'store' metadata about a table and then display them in the geometry_column view. Unfortunately the typmod is limited to XXX byte and there is too much information to 'store' about a raster table to use typmod. PostGIS raster will therefore use another approch consisting in 'store' metadata about a raster table as constraint on the table. A set of constraint will be applied to a raster table and those constraint will be read and displayed by the raster_column view.
     537PostGIS is using the typmod feature of PostgreSQL to 'store' metadata about a table and then display them in the geometry_column view. Unfortunately the typmod is limited to XXX bytes and there is too much information to 'store' about a raster table to use typmod. PostGIS raster will therefore use another approach consisting in 'storing' metadata about a raster table as constraint on the table. A set of constraint will be applied to a raster table and those constraint will be read and displayed by the raster_column view.
    538538
    539539The major changes concerning the raster_column table are as follow: