Changes between Initial Version and Version 1 of rfc15_nodatabitmask


Ignore:
Timestamp:
Aug 4, 2007, 8:01:57 AM (17 years ago)
Author:
warmerdam
Comment:

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  • rfc15_nodatabitmask

    v1 v1  
     1= RFC 14: NoData Bitmasks =
     2
     3Author: Frank Warmerdam[[BR]]
     4Contact: warmerdam@pobox.com[[BR]]
     5Status: Development
     6
     7== Summary ==
     8
     9Some file formats support a concept of a bitmask to identify pixels that are not valid data.  This can be particularly valuable with byte image formats where a nodata pixel value can not be used because all pixel values have a valid meaning.  This RFC tries to formalize a way of recognising and accessing such nodata bitmasks through the GDAL API.
     10
     11== 
     12
     13{{{
     14    virtual CPLErr BitmaskIO( GDALRWFlag, int, int, int, int,
     15                              GByte *, int, int, GDALDataType,
     16                              int, int *, int, int, int );
     17}}}
     18
     19
     20== Implementation Plan ==
     21
     22This change will be implemented by Frank Warmerdam in trunk in time for the 1.5.0 release.
     23
     24== SWIG Implications ==
     25 
     26
     27== Testing ==