Hi Ruben,
My guess is that the OMArc calculations are based on a spherical model of the earth, and Geo works on an ellipsoidal model (and is more accurate). That's probably why the difference is greater as you move away from the equator, since the models diverge the same way.
I've used the Geo class to create points for an arc, which I then sent to an OMPoly for rendering.
Hope this helps,
-- Don
On Dec 15, 2010, at 12:45 PM, Ruben DF <rdocasalf_at_yahoo.es> wrote:
> Hi,
>
> I'm having some troubles with OMArc component. Imagine I have 2 points drawn on the map (A and B, for example) and I want to get the arc between both of them (common case). First of all, center of both points is calculated by means of midPoint method (from Geo class). Afterwards, having center point, I can calculate the distance and azimuth between one of the points (A for example) and the center (with distanceKM and azimuth methods respectively from Geo class) The problem is related to generate the OMArc, since this appears slighlty moved, I mean, It seems that the azimuth between center and A does not match up (this effect is higher when I zoom the map in) and because of this, there is a short distance (several meters) between point A and one of the end of the arc.
>
> Any ideas?? any help will be appreciate.
> Thanks in advance
>
> Regards
> Ruben
>
>
>
--
[To unsubscribe to this list send an email to "majdart_at_bbn.com"
with the following text in the BODY of the message "unsubscribe openmap-users"]
Received on Thu Dec 16 2010 - 20:53:54 EST