10. Tips
//For Client
rc = map.getBounds();
mapArea = rc.getSouthWest() +","+rc.getNorthEast();
var url = "http://hoge/fuga.php?ll="+mapArea+"&cache="+(new Date()).getTime();
var httpObj = createHttpRequest();
httpObj.open("GET",url,true);
httpObj.send(null);
//For Server
$sql = "SELECT * FROM hoge
where ((lat BETWEEN $swlat and $nelat) and (lng BETWEEN $swlng and
$nelng))";
NE(lat,lng)
SW(lat,lng)