https://ctech.com/studio_help/file-format-details/lpdv-lithology-point-data-value-file-format/index.htmlLPDV Lithology Point Data Value File Format The LPDV lithology file format is the most general, free-form format to represent lithology information. To understand the rationale for its existence, you must understand that when creating lithologic models (smooth or block) with lithologic modeling, the internal kriging operations require lithologic data in point format. Therefore all other lithology file formats (.PGF and .LSDV) are converted to points based on the PGF Refine Distance. LPDV files are not refined since we use the point data directly.Hugoen-us