Hi Steve,
ok, got it: 1 / 0.3048 ~ 3,2808, which is also mentioned here:
http://www.metric-conversions.org/length/feet-to-meters.htm
So, I think it is plausible that the factor is a constant.
I'd prefer to use something like
// length should be in units of 16 feet
return (int) (l * 0.3048) / 16;
And maybe this also gives the precise default value
for short-arc-removal:
16 * 0.3048 = 4,8768
Gerd
GerdP wrote
> Hi Steve,
>
> in mkgmap.jar (RouteArc) we use
> private static int convertMeters(double l) {
> // XXX: really a constant factor?
> // this factor derived by looking at a variety
> // of arcs in an IMG of Berlin; 1/4 of
> // what used to be here
> double factor = 3.28 / 16;
> return (int) (l * factor);
> }
>
> In the display tool we use
> // length should be in units of 16 feet
> item.addText("length %d (%dm)", len, (int)(len * 16 /
> 3.25));
>
> I guess it should always be either 3.28 or 3.25?
> On the other hand, if the length is
> somehow related to the unit foot, why
> do I not see something like 0.3048?
>
> Gerd
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