It is possible to grid collinear data in Surfer 15 and newer. If you are receiving this message using Surfer 15 or a newer version, try using one of the following gridding methods:
- Inverse Distance
- Nearest Neighbor
- Moving Average
- Data Metrics
Surfer 14 and older versions cannot grid data if all of the points are collinear (all in a straight line).
To work around this in older versions, either add more data points not in the line, or change one of the values by a small amount (e.g. 0.001), save the changes, and grid the data.
Updated November, 2019
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