Description
If you add topography to geo_model in gempy then you can generate nicely looking geological map by using gempy function
plot_2d.
This process is described in details in the gempy manual:
https://docs.gempy.org/tutorials/ch1_fundamentals/ch1_3b_cross_sections.html#sphx-glr-tutorials-ch1-fundamentals-ch1-3b-cross-sections-py
However, there is s a subtle error in the process of constructing of the resulting map. This error is so subtle it's even made its way into the manual mentioned above.
Section 1 looks nice.
But If you look closer on section 2 on the resulting map from the manual you'll see that geology that is presented on the section differs from the geology under the trace of section 2 on the map. The same issue with section 3.
The problem here lies not in the section but in how this geological map is compiled. It's relief is drawn correctly. It's data points are placed on the correct positions. But the lithology and contacts are flipped along diagonal axis. That's why section1 looks correct.