Grid spacing or resolution recommendations for use in Surfer

There is no grid spacing or number of nodes to fit all data sets. The grid spacing to choose will depend entirely on the spatial distribution of the data and your personal preference. The grid spacing or grid resolution can be viewed much like image resolution. If your map covers a large area or will be displayed on a large scale, a higher resolution may be needed to obtain desirable results.

The default grid resolution is 100 grid lines in the longest direction. Increasing this may help if you have very dense data or data points very close together. 

Some examples:

  1. If you have LiDAR data or data that is already spaced out on a grid (or near-grid) pattern, you should use the Nearest Neighbor gridding method, and set the grid Spacing equal to the spacing of the data points in the X and Y directions.
  2. If your data is very dense in some areas but sparse in other areas, use the spacing between the dense data points as the spacing for the grid nodes, otherwise their values and variations will be simplified and glossed over.


Updated November 2021

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