Follow

How is the default grid Spacing or # of Nodes calculated in the Grid Data dialog in Surfer?

The defaults for the Grid Line Geometry section, in the Grid Data dialog, are calculated as follows:
  1. 100 grid nodes are assigned to the longest direction.
  2. The grid spacing is calculated for that direction:
         (Maximum-Minimum) / (# of Nodes – 1)
  3. The same grid spacing is applied to the shorter direction.
  4. The # of Nodes for the shorter direction is calculated:
         ((Maximum-Minimum) / Spacing) + 1
  5. If the # of Nodes in the shorter direction is not greater than 4, then the minimum and maximum values in that direction will be adjusted so that there are at least 4 grid nodes. This means that for data sets where one direction has a vastly different range than the other direction, the grid extents may not exactly match the data extents.

 

Updated February 8, 2017

Was this article helpful?
0 out of 0 found this helpful
Have more questions? Submit a request

0 Comments

Please sign in to leave a comment.