The 50k series

Based on: HRSC data

Editors: Alberz J, Jaumann R, Neukum G (TU, DLR, FUB)

Date: 2005-2007

References 

https://astrogeology.usgs.gov/search/map/Research/ISPRS/ISPRS_465_J_Albertz

"Each map sheet has been generated automatically using the software PIMap" (Source)