hello As far as I know, one of the objectives of mapserver is seamless data transfer. Can anyone can tell me what "seamless" means in terms of WebGIS ? regards -- Ahmet Temiz Jeoloji Müh. Planlama ve Zarar Azaltma Dairesi Başkanlığı Bilgi ve CBS grubu Eskişehir Yolu 10. km. Lodumlu / Ankara Tel : 0 312 2872680 / 1535