API: merge_duckdb

Merge all pixel-level parquet tables for one flightline.

Parameters

flightline_dir : Path Directory containing the flightline's parquet outputs. out_name : str, optional Custom name for the merged parquet. If None, defaults to: _merged_pixel_extraction.parquet original_glob : str, optional Glob used to locate original reflectance parquet tables. corrected_glob : str, optional Glob used to locate corrected reflectance parquet tables. resampled_glob : str, optional Glob used to locate resampled sensor parquet tables. write_feather : bool, optional If True, writes a Feather copy of the merged table alongside the parquet. emit_qa_panel : bool, default True If True, renders the standard QA panel (_qa.png) after merging. ray_cpus : int, optional CPU budget forwarded to Ray validation of Parquet shards. Defaults to None which allows the Ray helper to choose the configured default. merge_memory_limit_gb : float or str, optional Upper bound on DuckDB's memory usage. Floats are interpreted as GiB. Provide None to leave the default DuckDB behaviour unchanged. merge_threads : int, optional Number of threads DuckDB should use for the merge. None keeps the engine default (usually os.cpu_count()). merge_row_group_size : int or None, optional Target number of rows per Parquet row group in the merged output. If None, DuckDB will auto-determine the optimal size (better streaming performance). merge_temp_directory : Path, optional Directory where DuckDB should spill temporary data. Defaults to a .duckdb_tmp subdirectory inside flightline_dir.

Returns

Path Path to the merged parquet file.