The documents describe the classification method used in the following publication:
Krukar, J., Muenzer, S., Lörch, L., Anacta, V.J.A., Fuest, S., and Schwering, A. (2018) Distinguishing Sketch Map Types: A Flexible Feature-based Classification. Spatial Cognition 2018 Conference.
Method-ver1-de.pdf: this is the exact file used for the classification described in the paper (in German).