Mars Crater CTX Images with Dual Degradation Labels

33,901 grayscale CTX image patches (1024×1024 PNG) of Mars craters, each carrying two independent degradation labels: Liu et al. class (A=fresh -> C=heavily degraded) and Robbins & Hynek preservation state (1=most degraded -> 4=pristine; note the opposite direction). labels.csv provides: crater_id lon (longitude) lat (latitude) diameter liu_label robbins_state source_tile All images are keyed to images/<crater_id>.png. Note: liu_label values are random-forest predictions, not manual annotations. Treat as noisy. Sources & attribution. Crater imagery is derived from the Murray Lab Global CTX Mosaic of Mars (Dickson, Ehlmann, Kerber & Fassett 2024, Earth and Space Science, DOI:10.1029/2024EA003555; acknowledging Caltech, Malin Space Science Systems, and JPL). The liu_label degradation classes are from Liu et al. (CC-BY-4.0; DOI:10.5281/zenodo.11514787). The robbins_state values are from the Robbins & Hynek (2012) Mars crater database (DOI:10.1029/2011JE003966).