Filter Variants: Optimization metrics and filtered station observations for spring barley (Hordeum vulgare, DWD Plant ID 207) in Germany

Filter-variant optimization outputs of the PhenoPhaseR pipeline for spring barley (Hordeum vulgare L., DWD Plant ID 207), for Germany over 2014–2025. The intermediate station-filtering product: per-phase OPT_* optimisation metrics and the selected filtered station observations (SHP_*). No interpolated raster and no uncertainty layer. Pipeline Steps 5-6. Provenance: generated with PhenoPhaseR (software concept DOI 10.5281/zenodo.18743008). AGROVOC subject anchoring (crop species + family concepts, with Wikidata cross-links) is carried identically in the accompanying RO-Crate's schema:about.