If you would like to put marker on the vertical or horizontal point of
the circumference you can try the following:
// creating the circle
myCircle = new google.maps.Circle({
map: map,
center: new google.maps.LatLng(circleLat, circleLng),
radius: 8000 // 8 km
});
// eastern lat and lng will be:
easternLat = myCircle.getCenter().lat();
easternLng = myCircle.getBounds().getNorthEast().lng();
// northern lat and lng:
northernLat = myCircle.getBounds().getNorthEast().lat();
northernLng = myCircle.getCenter().lng();
// for southern and western coords algorithm is the same, but you only
need to replace getNorthEast() with getSouthWest()
On May 31, 5:15 pm, "ricco *" <[email protected]> wrote:
> Thanks a lot, this help me understand the underlying math.
>
> However, i think i need a formula to translate meters to pixel at given
> zoom.
>
> Cheers
> riccco
>
> 2010/5/31 Stephen Lead <[email protected]>
>
> > It's been a while since I had to do this, so double-check the values.
>
> > I think you can use SOHCAHTOA to calculate the coordinates of the new
> > point, by drawing right-angles from the new point and the existing point,
> > since you know the radius and the angle.
>
> > My dodgy diagram athttp://www.flickr.com/photos/passenger57/4655953942/might
> > help......
>
> > On 31 May 2010 18:49, rccc <[email protected]> wrote:
>
> >> Hello,
>
> >> I try to play with the new Circle class (http://code.google.com/apis/
> >> maps/documentation/javascript/reference.html#Circle<http://code.google.com/apis/maps/documentation/javascript/reference.h...>).
> >> The API says we
> >> have to set a center in LatLng and a radius parameter in meters in the
> >> constructor.
>
> >> But i would like to put a marker on the circumference line.
>
> >> How could i get/calculate the latlng of a point on this
> >> circumference ?
>
> >> thanks by advance for response :)
>
> >> riccco
>
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