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A closed boundary (or border) line defines the area inside within the grid window limits, to be the defined area of the grid. One can use a reference grid or a boundary line that can be digitized or automatically generated. Try various values for maximum gap and push Check boundary to see the result until pleased.
Automatic generated border line
The axes notation to the right indicates the distances in the grid and the maximum gap value.
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A reference grid can also be generated automatically. That is described in Determine the defined area 87401351.
The z values of the reference grid are zero. Then one can add the reference grid to any structure grid with the same grid size and get the intersecting surface result. Thus the reference grid serves as a mask grid.
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Result of several smoothing steps using the smoothing menu
Rotated grids (Geocap8)
Geocap8 supports display of rotated grids and cubes. Many commands related to gridding and grid handling also supports rotation. These include
- grp (gridding)
- grp sav
- grp ret
- bmo (gridding)
- zap
- mak fre
- mak p
- mak g
- pro
- gr3