Hey All,
I'm running in to an error that seems like a bug in
TABMAPHeaderBlock::Coordsys2Int.
I am using exclusivly lat/long coordinates (mostly in the US). The default
m_nCoordOriginQuadrant (1) leads to a coordinate being converted with:
dTempX = (double)((dX*m_XScale + m_XDispl)+0.5);
...
nX = (GInt32) dTempX;
If the coordinate is <0 this leads it being increased by one in the least
significant digit. This happens because it is adding .5 regardless of dX
being less than 0 and then the conversion to int truncates.
It seems to me that we need to make one of the following changes:
dTempX = (double)((dX*m_XScale + m_XDispl)+(dX<0 ? -0.5 : 0.5));
or
nX = (GInt32) floor(dTempX);
Am I crazy? I was really surprised to find such a basic bug after using
this library for years.
Any ideas?
Ned.
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