判断一个点是否在一组经纬度包围圈内

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判断一个点是否在一组经纬度包围圈内

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将判断点经纬度塞入Point2D.Double中，将包围圈放入点集之中。
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public static  boolean isInPolygon(ArrayList bound, double pointlng, double pointLat) 
	{
		Point2D.Double point = new Point2D.Double(pointlng, pointLat);
		List pointList = new ArrayList();
		for (int i = 0; i < bound.size(); i++) {
			pointList.add(new Point2D.Double(bound.get(i).lng, bound.get(i).lat));
		}
		return check(point, pointList);
	}

将点集中的数据组成不规则几何图形，使用封装好的方法判断点是否在几何图形内部。

public static boolean check(Point2D.Double _point, List polygon)
{
	java.awt.geom.GeneralPath peneralPath = new java.awt.geom.GeneralPath();
	
	Point2D.Double first = polygon.get(0);
	peneralPath.moveTo(first.x, first.y);
	polygon.remove(0);
	
	for(Point2D.Double d : polygon)
	{
		peneralPath.lineTo(d.x, d.y);
	}
	
	peneralPath.lineTo(first.x, first.y);
	peneralPath.closePath();
	
	return peneralPath.contains(_point);
}