Creating Profile Lines (Cross Sections)

The Slice command produces profile data that can be plotted using GRAPHER, GRAPHER for Windows, or any XY plotting package The profile is generated by taking a vertical slice through a surface along a boundary line. The surface is based on a grid [.GRD] file or USGS DEM file and the boundary line is from a blanking [.BLN] file.

The Slice command produces an ASCII data file or a blanking [.BLN] file containing Z values.

Profile lines represent a slice taken through the surface of a grid [.GRD] file. The profile line is defined in a blanking [.BLN] file line that traverses the grid file. The Slice command produces profile data that can be plotted using GRAPHER or GRAPHER for Windows. The profile is generated by taking a vertical slice through a surface along a boundary line. The surface is based on a grid [.GRD] file or USGS DEM file and the boundary line is from a Golden Software Blanking [.BLN].

The ASCII data file consists of five columns of data. When profile data is written to the ASCII file, a new row of data is generated for each point where the boundary line intersects the grid lines (the rows or columns) in the data file. The columns in the data file are arranged as follows:

Column 1: X coordinate of the boundary line and grid line (row or column) intersection

Column 2: Y coordinate of the boundary line and grid line (row or column) intersection

Column 3: Z value at the boundary line and grid line (row or column) intersection

Column 4: Accumulated horizontal distance along the boundary line

Column 5: Boundary number, used when more than one boundary line is contained in the file.

To produce a profile from the data file generated in slice, you can use this file in GRAPHER or GRAPHER for Windows. When you plot the data, Column 3 (the Z value) is plotted as the Y coordinate. You can plot the Z value versus either Column 1, Column 2 or Column 4.

Using Column 1 as the X coordinate in GRAPHER produces a profile line projected onto the X-Z plane in Surfer. Using Column 2 as the X coordinate in GRAPHER produces a profile line as it would project on the Y-Z plane in Surfer. Using Column 4 as the X coordinate in GRAPHER produces a profile line that shows the true accumulated distance along the boundary line.

Файл гашения, созданный командойSlice, содержит три столбца данных. Они используются в основном версией программы дляDOS (когда нужно нарисовать линии границ на поверхности), а в версии дляWindowsимеют ограниченное применение.

• Столбец А содержит координаты Xкаждой точки, где граничная линия пересекает линии сетки.

• Столбец В содержит координаты Y.

• Столбец С - координаты Z.

Creating Cross Section Data

To create a data file containing cross section data:

1. Choose the Slice command from the Grid menu. In the Open Grid dialog box, specify the grid [.GRD] file or DEM file to use, and click OK.

2. In the Open File dialog box, specify the blanking [.BLN] file to use when producing the profile data. Click OK and the Grid Slice dialog box is displayed.

3. If you want to produce a [.BLN] file, click the Browse button in the Output BLN File group. Specify the name for a blanking [.BLN] file to produce during the slice operation. The name then appears in the Output BLN File group box.

4. Click the Browse button in the Output DAT File group box and specify the name for an ASCII data file where you want to write the cross section data. The name then appears in the Output DAT File group box.

* The Clip outside grid checkbox limits the output profile line to the limits of the grid file. If your blanking [.BLN] file line extends beyond the limits of the grid, the points outside the grid are not included in the slice data file when the checkbox is active.

* The Clip blanked areas checkbox eliminates data from areas that are blanked in the grid file. If blanked nodes exist in the grid file used for the slice operation, you can eliminate the blanked areas from the output data file when the checkbox is active.

5. Click OK and a data file (and [.BLN] file if specified) is created containing the cross section data. If you want to produce a cross section or profile line, you can use Golden Software's GRAPHER or GRAPHER for Windows programs to produce the XY plots of your data.