Training dataset — ICESat-2 ATL08 v7 with 33-feature stack over central Chile

77,501 ICESat-2 ATL08 v7 ground-classified footprints over central Chile (Mataquito + Maule basins) enriched with 33 geomorphometric, hydrological, and Sentinel-1/2 features. EGM2008 orthometric heights, regression target h_te_ortho − FABDEM. Apache Parquet. Companion to Parra Ortiz (2026). Full README, file inventory, and integrity hashes are in README.md and MD5SUMS.txt below.