The data repository contains the mapping shapefiles of geological units, data pertaining to the thickness measurements of the vent-proximal deposits, and Excel sheets that allow to reproduction of the spatter rampart deposits investigation south of Ascraeus Mons, Mars. The mapping and thickness measurements were conducted based on the CTX stereo-pair images P02_001774_1848, centered at 4.86°N, 254.60°E, and B01_009949_1844, centered at 4.46°N, 254.62°E, from which the digital elevation model was produced using MarsSI system (Mars System of Information) designed by Quantin-Nataf et al. (2018).