Hi Giorgio, It doesn't look like you are using the Google Web Toolkit (GWT),<http://code.google.com/webtoolkit>but straight JavaScript.
Searching the Maps group <http://groups.google.com/group/Google-Maps-API>might be of some help, but keep in mind that the Maps forum has some posting guidelines you should check out before posting a message there. On Mon, Oct 6, 2008 at 11:21 AM, atpco81 <[EMAIL PROTECTED]> wrote: > > Hi all, > > I'm a newbie and this could be a very simple question: > How could I draw a circle in a maps if I know its center and radius? > > I use JS and I do a circle using the distance from two different > points as, but I want to use a function like this example: > http://maps.forum.nu/gm_sensitive_circle2.html > I have been trying to work with this function but it doesn't work! > > function drawCircleFromRadius(){ > > if (circleLine) { > map.removeOverlay(circleLine); > } > var bounds = new GLatLngBounds(); > var circlePoints = Array(); > centerPoint= center.getPoint(); > map.setCenter(centerPoint); > > with (Math) { > circleRadius= (radius/1000); //km > var d = circleRadius/6378.8; // radians > var lat1 = (PI/180)* centerPoint.lat(); // radians > var lng1 = (PI/180)* centerPoint.lng(); // radians > > for (var a = 0 ; a < 361 ; a++ ) { > var tc = (PI/180)*a; > var y = > asin(sin(lat1)*cos(d)+cos(lat1)*sin(d)*cos(tc)); > var dlng = > atan2(sin(tc)*sin(d)*cos(lat1),cos(d)-sin(lat1)*sin(y)); > var x = ((lng1-dlng+PI) % (2*PI)) - PI ; // MOD > function > var point = new > GLatLng(parseFloat(y*(180/PI)),parseFloat(x*(180/ > PI))); > circlePoints.push(point); > bounds.extend(point); > } > > if (d < 1.5678565720686044) { > circle = new GPolygon(circlePoints, '#000000', 2, 1, > '#000000', > 0.25); > } > else { > circle = new GPolygon(circlePoints, '#000000', 2, > 1); > } > map.addOverlay(circle); > > map.setZoom(map.getBoundsZoomLevel(bounds)); > } > } > > Is it a problem of Google API version(I use the v.2.x)? > Have you got another examples ? > > Cheers > Giorgio > > > > -- Eric Z. Ayers - GWT Team - Atlanta, GA USA http://code.google.com/webtoolkit/ --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~----------~----~----~----~------~----~------~--~---
