描述了S57标准国际电子海图的数据格式的详细说明-S57 standard describes the data format of international electronic chart

小比例尺S-57格式电子海图数据，非常高兴能和大家分享，期待与大家一起讨论。-Small-scale S-57 format for electronic chart data, very pleased to share with you and look forward to discuss with you.