It is a calculation of the outline.
It is not a correct calculation, and there is an error.
you confirm it, and please use it.....
private function GetPolygonArea (polygon : Polygon):Number
{
var nVer : int = polygon.getOuterVertexCount();
var sz : Number =0;
var s : Number =0;
var x : Number =0;
var y0 : Number =0;
var y1 : Number =0;
var Maplatlng:LatLng;
if (nVer>=3){
for (var i:int=0; i<nVer; i++){
Maplatlng = polygon.getOuterVertex(i);
x = Maplatlng.lng();
if (i>0){
Maplatlng = polygon.getOuterVertex(i-1);
y0 = Maplatlng.lat();
}
else{
Maplatlng = polygon.getOuterVertex(nVer-1);
y0 = Maplatlng.lat();
};
if (i<(nVer-1)){
Maplatlng = polygon.getOuterVertex(i+1);
y1 = Maplatlng.lat();
}
else{
Maplatlng = polygon.getOuterVertex(0);
y1 = Maplatlng.lat();
};
s = x * (y0-y1);
sz+=s;
};
//경위도시 1도의 m값을 곱한다(대략 면적 환산)
Maplatlng = polygon.getOuterVertex(0);
var Maplatlng1:LatLng = new
com.google.maps.LatLng(Maplatlng.lat()+1, Maplatlng.lng()+1);
var TempDISTANCE:Number =
Maplatlng.distanceFrom(Maplatlng1) / Math.sqrt(2);
return Math.abs((sz/2.0) * Math.pow(TempDISTANCE, 2));
};
return 0.0;
}
exc.
http://groups.google.com/group/google-maps-api-for-flash/web/example-google-map-application-for-flash
http://cafe.naver.com/gisapplication/21
On 7월28일, 오전8시48분, laxmidi1994 <[email protected]> wrote:
> Hi,
>
> How do I calculate the area of my irregularly shaped overlay?
>
> I've got a upon which map that I put an overlay. I'd like to be able
> to tell the user that overlay A is X sq. meters.
>
> Any suggestions?
>
> Thank you.
>
> -Laxmidi
--
You received this message because you are subscribed to the Google Groups
"Google Maps API For Flash" 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-maps-api-for-flash?hl=en.
