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| How can I create dashed contour lines in the blanked areas of my map? |
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To view contours in blanked areas and have them be displayed with a different line style (dashed, gray, etc), you can follow these steps:
- Blank the grid file using the BLN file.
- Open the BLN file in the Surfer worksheet and change the value in cell B1 to either a 1 or a 0 (if it is 1, change it to a 0. If it is a 0, change it to a 1). Save and close the BLN file.
- Blank the original grid file again using the modified BLN file.
- Create two contour maps from the two blanked grid files.
- Use Map | Overlay Maps command to overlay them.
- Change the line style for the contour map that has contours in the area you want changed.
Please see attached for example.
If there is too large a gap between the two contour maps (where the blanked polygon line is), you may need to regrid the original grid file with higher resolution (more grid lines) and repeat the process above. Smaller grid cells (more grid lines) will reduce the space between contour maps. The example attached was created with 300 x 300 grid lines.
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