[gdal-dev] Extra Decimal places added to ASCII gdal_translate mosaic

[Jonathan Moules]

>
> TIFF stores floating point values as IEEE754 floats. Talking about
> significant
> figures doesn't make much sense. You could test using Float64 with the hope
> that 50.597 can be exactly represented as a Float64. Otherwise you'll have
> to
> do the rounding when reading back from TIFF.
>


Hi Even,
Thanks for the information. I don't pretend to understand the fine details
of floats, but it does seem counter intuitive that a simple 2 or 3 decimal
places can't be accurately represented.

I tried the Float64 but the values are identical (16 significant figures)
even though the filesize is predictably larger.

I guess I'll have to make do, but it does introduce the problem of False
Precision.

Thanks all,
Jonathan

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