Enhancement: provide a datum parameter

[wmheigl]

In borehole seismic applications, one often has velocity information over certain depth interval only and one is generally not interested in surface phenomena. It would be advantageous to have a datum parameter that allows to have the top of the computational grid not at z=0 but at some chosen depth, thus reducing the size of the computational grid and the computing time.

[andersp]

Thanks for your comment, @wmheigl. You can provide a topography file with negative elevation to remove that part of the computational domain. However, a free surface boundary condition will still be imposed on the top boundary, which probably is not what you want?

[wmheigl]

That is correct, Anders. For my needs I would need absorbing boundaries all around the model.

It’s great to see that you follow up the communities suggestions.

On Jan 13, 2022, at 11:10 AM, Anders Petersson @.***> wrote:

Thanks for your comment, @wmheigl https://github.com/wmheigl. You can provide a topography file with negative elevation to remove that part of the computational domain. However, a free surface boundary condition will still be imposed on the top boundary, which probably is not what you want?

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