Hello, I have a matrix 1.5 million rows long..

wald:

 coordinates  V3
1  (-124.996, 42.0458) 150
2  (-124.987, 42.0458) 150
3  (-124.979, 42.0458) 150
4  (-124.971, 42.0458) 150
5  (-124.963, 42.0458) 150
6  (-124.954, 42.0458) 150
7  (-124.946, 42.0458) 150
8  (-124.938, 42.0458) 150
9  (-124.929, 42.0458) 150
10 (-124.921, 42.0458) 150
>


I would like to coerce this into a grid object so that I can overlay points
onto it.  How exactly could I accomplish that?  Thank you!!

Mehdi Khan

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