Can we grid one file with two different increments?

Q&A
#1

Good morning,
I using the GMT to plot a gradient map generated with a circular grid points centered on the epicenter, where points are more condense in the epicenter area and much discarded far from it.
Using xy2grd or surface I can’t find a proper way to grid since it’s not in a regular cell sizes.
Is there a way to specify two increments, one (small steps) in the center of map and another one much larger starting at a given distance or coordinates?

Here’s the surface command I’m using
surface $Gridzone input.txt -I5k -Goutput.grd -V -A0.9

Thank you very much

#2

No, that is not possible. Regular grids are just that, regular. Cannot have variable grid spacing.

And note also that xyz2grd is not an interpolator. It is a reformatter

#3

Thank you very much for your explanation