Premstaller Geotechnik CPTu and SCPTu soundings — curated Parquet for the conic library

Curated CPTu and SCPTu subsets of the Premstaller Geotechnik cone penetration test dataset (Oberhollenzer et al., 2021), prepared as analysis-ready Parquet files for the conic library. The original combined CSV was filtered by test type into two files — piezocone (CPTu) and seismic piezocone (SCPTu) — retaining measured inputs and supplied stresses. Derived/normalized columns from the source were omitted, as they are meant to be recomputed. Empty cells were parsed as nulls; one concatenated profile (original ID 576) was repaired by removing two non-advancing rows; a dense per-file key (Sorted ID) was assigned while preserving the source identifier (Original ID); and basin/valley labels were kept as a title-cased Location column. Files are sorted by sounding and depth and stored as zstd-compressed Parquet. This curated derivative is released under CC BY 4.0. Changes are limited to filtering, splitting, cleaning, re-keying, and format conversion. Original dataset: Oberhollenzer, S., Premstaller, M., Marte, R., Tschuchnigg, F., Erharter, G.H., Marcher, T. (2021). Cone penetration test dataset Premstaller Geotechnik. Data in Brief, 34, 106618. https://doi.org/10.1016/j.dib.2020.106618