Find the Z value of known XY points in Surfer

Use Surfer's Point Sample tool to quickly find the Z value of XY points within the map:

Click Grids | Calculate | Point Sample.
In the Input Grid section, either select your grid-based map from the dropdown list, or click the Browse button to navigate to and select your grid file.
In the XY Data section, either select your post/classed post map from the dropdown list, or click the Browse button to navigate to and select the data file containing your x,y locations.
In the Data Columns section, verify the X and Y are set to the appropriate columns from the data file.
At the bottom of the dialog, choose what column of the data file to store the z values in.
Click OK and a worksheet is opened containing this updated data file.
Click File | Save or File | Save As to save the changes.

Updated November 2021

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