A cross section is the non-empty intersection of a solid body in three-dimensional space with a plane. In Geology we are usually interested in some transversal cut (not as a map). The problem is that the cut itself is not what defines the identity of different kinds of cross sections.
For instance, a seismic image and a geological cross section are both an intersection of a plane with a 3d body, but they are completely different things. A seismic image is an image, the geological cross section is a diagram.
We have to remove the cross section concept from diagram and move the children that are diagrams to the "diagram" class and the children that are images to "image".
A cross section is the non-empty intersection of a solid body in three-dimensional space with a plane. In Geology we are usually interested in some transversal cut (not as a map). The problem is that the cut itself is not what defines the identity of different kinds of cross sections. For instance, a seismic image and a geological cross section are both an intersection of a plane with a 3d body, but they are completely different things. A seismic image is an image, the geological cross section is a diagram. We have to remove the cross section concept from diagram and move the children that are diagrams to the "diagram" class and the children that are images to "image".