设易景瓦片级别变量:el,列号:ex,行号:ey
设天地图经纬度瓦片级别变量:tl,列号:tx,行号:ty
tl = el + 2
tx = ex + (1 << (el + 1))
ty = (1 << level) – ey – 1
JAVA代码示例
天地图转易景瓦片:
Tran( col, row,level)
{
el = level – 2;
ex = col – Math.pow(2, el + 1);
ey = Math.pow(2, el) – row – 1;
}