Bathymetry of Lake Trasimeno

The bathymetry of Lake Trasimeno was carried out in several survey campaigns from 2004 to 2012 by means of multifax digital echo sounder during the carrying out of the geophysical surveys carried out in Lake Trasimeno for the realisation of Geological Sheet No. 310 “Passignano sul Trasimeno”. The depths are indicated with isobates every 25 cm in absolute altitudes in meters above sea level or as depths referring to the hydrometric zero of Lake Trasimeno which is placed at an altitude of 257.33 m above sea level.为编制第310号地质图《特拉西梅诺湖畔帕西尼亚诺》（"Passignano sul Trasimeno"），研究团队在特拉西梅诺湖开展地球物理勘探期间，于2004年至2012年间借助多频数字回声测深仪（multifax digital echo sounder）完成了多轮测量航次，获取了该湖的水深测绘数据。 本次水深数据采用两类基准进行标注：其一为以米为单位的海平面以上绝对高程，相邻等深线（isobates）的高程间隔为25厘米；其二是以特拉西梅诺湖水文零点为基准的水深值，该水文零点的海拔高度为257.33米。