用于计算Eclipse有效厚度的属性，首先判断是否为油层，然后根据油层的净厚度叠加求取有效厚度，赋值给其中一个层，这样可以在3D图中显示。-Eclipse used to calculate the effective thickness of the attributes, first determine whether the oil, then the net thickness of oil layer thickness of overlay to strike effectively

基于ArcGIS For silverlight API开发的3D地形显示器源码-ArcGIS For silverlight API developed 3D terrain display source