Changes between Version 25 and Version 26 of WKTRaster/GDALDriverSpecificationWorking


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Timestamp:
Feb 17, 2011, 3:54:01 PM (13 years ago)
Author:
pracine
Comment:

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  • WKTRaster/GDALDriverSpecificationWorking

    v25 v26  
    121121=== Implementation ===
    122122
     123'''Pierre:''' Can't it not be as simple as the pseudo code below? In the best case the required blocks fits what is in the table and everything is optimized. If not it is slower. We don't have to know in advance whether the table is regularly tiled or not.
    123124
     125--------------------------------
    124126GDALRasterBand::IRasterIO(required tile metadata)
    125 
    126  '''Pierre:''' Can't it not be as simple as that? In the best case the required blocks fits what is in the table and everything is optimized. If not it is slower. We don't have to know in advance whether the table is regularly tiled or not.
    127127
    128128  Deduce a world coordinate rectangle which four corners are the center of the upper left, lower left, lower right, upper right pixels of the area requested.