Changes between Initial Version and Version 7 of Ticket #174


Ignore:
Timestamp:
05/13/14 16:47:50 (10 years ago)
Author:
Norm Olsen
Comment:

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  • Ticket #174

    • Property Resolution → fixed
    • Property Status new → closed

  • Ticket #174 – Description

    initial v7  
    44
    55Seems that since the coordinates are outside the coverage of the entire NTv2 file, the performance penalty should not be so large.
     6
     7Added overall file extents to the main NTv2 transformation object.  Now the CStestNTv2 function can see if the point in question is within the overall coverage of the file rather quickly.  Sub-grids are examined only in the case where the query point is within the coverage of the overall file.
     8
     9This is especially helpful in the case of NAD83, where most of the US48 geography is not covered by the Canadian NTv2 data file.
     10
     11Fix incorporation produced revision 2444.