Good morning,
while debugging https://github.com/hbeni/therionsurface2survex/issues/1
i stumbled upon a format question i did not give tought until yesterday.
With the "grid" command you specify coordinate origin and size of a
surface grid:
grid <origin x> <origin y> <x spacing> <y spacing> <x count> <y count>
Until now i assumed that:
a) these data has to be all positive.
But i'm not sure... origin may surely get negative (like in wgs89 and
for example western and southern of the 0-meridian/equator)
And also stepsize - might it get negative too (esp. with flipped grids
maybe)?
b) the spacing might only be integer numbers, not floats
Is this true? I just got an example with not-round stepsize.
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