Hi list.
If I understand the theoretical background for r.sun, then, horizon
maps are an option to speed up calculations. If this is true, this is
not necessary when working in smaller regions (where memory and
processing speed are simply enough).
In this case, r.sun's optional parameter "horizon_step" is only bound
to an optionally defined horizon map. Wouldn't it make sense, then, to
add another rule for this option, to warn a user that "horizon_step"
serves for the "horizon_basename" option? Something similar like the
error message in r.sun's main.c:
--%<---
607 }
608 else if (useHorizonData()) {
609 G_fatal_error(_("If you use the horizon option you must also
set the 'horizonstep' parameter."));
610 }
-->%---
Thanks for any explanations/comments in advance, Nikos
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