CPC Subgroup
G09B 29/12 Relief maps (relief models G09B25/06)
Full Title
Maps; Plans; Charts; Diagrams, e.g. route diagram (star maps G09B27/04; devices for holding or supporting maps A47B97/02; for computing purposes G06G1/14, G09B1/16; display boards G09F) > Relief maps (relief models G09B25/06)