function Demo_TW()
{
$p = array(282745, 2641869);
print_r($p);
echo "cs2cs法:\n";
$p1 = cs2cs_t67to97($p[0], $p[1], 0);
print_r($p1);
echo "cs2cs法 invert:\n";
$pp = cs2cs_t97to67($p1[0], $p1[1], 0);
print_r($pp);
echo "平面四參數轉換:\n";
$p1 = t67to97($p[0], $p[1]);
print_r($p1);
echo "平面四參數轉換 Invert:\n";
$p2 = t97to67($p1[0], $p1[1]);
print_r($p2);
echo "使用平面四參數轉換:\n";
$q = proj_67toge($p);
print_r($q);
echo "使用 cs2cs:\n";
$q1 = proj_67toge2($p);
print_r($q);
}
function proj_geto67($p)
{
$pp = array(deg2dms($p[0]) . "E", deg2dms($p[1]) . "N");
// print_r($pp);
$proj = "proj +proj=tmerc +ellps=aust_SA +lon_0=121 +x_0=250000 +k=0.9999";
$k = addslashes("{$pp['0']} {$pp['1']}");
$cmd = "echo {$k} | {$proj}";
// echo $cmd ."\n";
$ret = shell_exec("echo {$k} | {$proj}");
list($x, $y) = preg_split("/\\s+/", $ret);
return t97to67($x, $y);
}
