[Proj] Re: how to compare 2 proj4 definitions? or: how to
sena at hurd.homeunix.org
Thu Mar 1 07:36:05 EST 2007
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Ed McNierney wrote:
> I made a mild effort at this task a few years ago and gave up. I had
May be you still have some sources which I can use to start from? Even
if it is not perfect, it will be easier for me and can save some resources.
> The chief difficulty is in determining whether two very similar
> parameter values are supposed to be identical. Is 0.9997 the same as
> 0.999721, just rounded, or is it supposed to be a different number?
May be there it makes sense to have possibility to specify the level of
exactness of comparision for every group of parameters?
Like user-configurable "epsilon" 0.001 degree for lat/lon, 0.01 meter
for x_0/y_0 with some good default values?
Any other ideas?
PS Sorry if my English cause misundersanding...
Best regards, Sergey Spiridonov
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