nav cut z_level [nofd] [ver] [ext] ;# cut the navigation file at a certain level The navigation file will be cutted a level z_level. The new created dataset will be present in active after operation. Default is that present field data SP and 2Dline are generated in the new dataset and line structure is kept. arguments: z_level - value of cut level. Must be present directly after nav cut.
nofd – no field data is generated, but line structure is kept if field data SP and 2Dline are present in the navigation file.
ver – interpolation is done only if the line to be cut is completely vertical. This will prevent cutting nonvertical lines if the cell structure is incorrect. A correct cell structure has one vertical line per cell.
ext – extrapolation is performed when necessary at start and stop of the line if the cut level is outside the line. In that case a curve called extrapolationcurve shall be present in workspace. The extrapolation curve has entry on X and output on Y coordinates. |