G_units_to_meters_factor() (in lib/gis/units.c, in 7.0) has:
case U_FEET:
return 3.28083989501312; /* 1 / (0.0254 * 12) */
break;
This is correct for the international foot but, AFAIK, most (but not
all) non-metric geographical data uses the US survey foot.
IMHO, we need both U_FEET and e.g. US_USFEET. Possibly also for miles.
Or even U_INTFEET and U_USFEET; calling one of them just "feet"
creates a risk of users selecting the "default" rather the correct
one.
--
Glynn Clements <[email protected]>
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