public RCRange getRCRangeFromMercator(int level, int row1, int col1)
{
int PIC_SIZE = 256;
BdCoodOffsetProvider p = BdCoodOffsetProvider.getInstance();
System.Drawing.Point new_leftTop, new_leftBottom, new_rightTop, new_rightBottom;
//calc pixel offset of left bottom point in the tile
new_leftTop = getNewPixelOffsetOfLeftTop(level, row1, col1);
new_rightBottom = getNewPixelOffsetOfLeftTop(level, row1 + 1, col1 + 1);
new_rightBottom.X = new_rightBottom.X - 1;
new_rightBottom.Y = new_rightBottom.Y + 1;
new_leftBottom = getNewPixelOffsetOfLeftTop(level, row1 + 1, col1);
new_leftBottom.X = new_leftBottom.X;
new_leftBottom.Y = new_leftBottom.Y + 1;
new_rightTop = getNewPixelOffsetOfLeftTop(level, row1, col1 + 1);
new_rightTop.X = new_rightTop.X - 1;
new_rightTop.Y = new_rightTop.Y;
int maxY = new_leftTop.Y > new_rightTop.Y ? new_leftTop.Y + 5 : new_rightTop.Y + 5;
int minY = new_rightBottom.Y < new_leftBottom.Y ? new_rightBottom.Y - 5 : new_leftBottom.Y - 5;
int maxX = new_rightBottom.X > new_rightTop.X ? new_rightBottom.X + 5 : new_rightTop.X + 5;
int minX = new_leftTop.X < new_leftBottom.X ? new_leftTop.X - 5 : new_leftBottom.X - 5;
return(new RCRange()
{
MaxCol = maxX / PIC_SIZE, MaxRow = maxY / PIC_SIZE, MinCol = minX / PIC_SIZE, MinRow = minY / PIC_SIZE
});
}
public System.Drawing.Point getNewPixelOffsetOfLeftTop(int level, int row1, int col1)
{
BdCoodOffsetProvider p = BdCoodOffsetProvider.getInstance();
System.Drawing.Point org_leftBottom = getMetersFromRowCol(row1, col1, level);
LatLng lpt = MetersToLatLon(org_leftBottom);
LatLng testPoint = p.doAdjust(lpt, level);
LatLng meters = BdCoodOffsetProvider.BaiduGPS2BaiduMercator(new LatLng(testPoint.latitude, testPoint.longitude));
double resolution = GetResolutionForLevel(level);
System.Drawing.Point new_leftBottom = new System.Drawing.Point((int)(meters.longitude / resolution), (int)(meters.latitude / resolution));
return(new_leftBottom);
}
public RCRange getBaiduRCRangeFromGPS(Envelope area, int level)
{
int PIC_SIZE = 256;
double resolution = GetResolutionForLevel(level);
BdCoodOffsetProvider p = BdCoodOffsetProvider.getInstance();
LatLng leftTopLpt = new LatLng(area.YMax, area.XMin);
LatLng testPoint = p.doAdjust(leftTopLpt, level);
LatLng meters = BdCoodOffsetProvider.BaiduGPS2BaiduMercator(new LatLng(testPoint.latitude, testPoint.longitude));
System.Drawing.Point new_leftTop = new System.Drawing.Point((int)(meters.longitude / resolution), (int)(meters.latitude / resolution));
LatLng rightBottomLpt = new LatLng(area.YMin, area.XMax);
testPoint = p.doAdjust(rightBottomLpt, level);
meters = BdCoodOffsetProvider.BaiduGPS2BaiduMercator(new LatLng(testPoint.latitude, testPoint.longitude));
System.Drawing.Point new_rightBottom = new System.Drawing.Point((int)(meters.longitude / resolution), (int)(meters.latitude / resolution));
return(new RCRange()
{
MaxCol = (new_rightBottom.X + 5) / PIC_SIZE, MaxRow = (new_leftTop.Y + 5) / PIC_SIZE, MinCol = (new_leftTop.X - 5) / PIC_SIZE, MinRow = (new_rightBottom.Y - 5) / PIC_SIZE
});
}