[CIG-SHORT] problem about setting the spatial database

[Matthew Knepley]

On Mon, Mar 12, 2018 at 9:48 AM, tu xiang <tuxiang2016 at outlook.com> wrote:

> Dear Charles,
> Yes, it is better to write a script to generate the database. However, I
> do not know the process of writting the script because I do not know how to
> use the actual fault coordinates to set up the desired pattern.
> For example,
> If the nucleation zone is a circular area,  do I need to discretize the
> circular area into a grid of (x,y) coordinates and write the coordinates
> into the database? The value of the rest area of the fault which is outside
> the circular area will default to be zero?  Will the values of slip\stress
> from zero to the circular area change linearly?
> looking forward to your reply
>

If you use the SimpleGrid, you could get either linear interpolation or
nearest point. If you want exactly a circle, the best bet is to
make your own grid, sampling densely around the circle rim, and more
sparsely elsewhere, and using nearest point interpolation.

However, it would shock me if the precise interpolation you use around your
circle influenced the physical results. If that was true,
the form of earthquakes could be used to determine the precise shapes of
ruptures. It seems more likely that dissipation acts to
remove information about the precise rupture shape.

  Thanks,

    Matt


> Best regards,
> Tu Xiang
>
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