[CIG-SHORT] Why Pylith sometimes cannot use linear interpolation?

[Charles Williams]

Hi Tu,

I think it is generally not so much that there aren’t enough points, but that the points don’t completely surround the region to interpolate.  That’s because PyLith only does interpolation (not extrapolation).  If any of the mesh points lie outside the points in your spatial database, PyLith won’t be able to interpolate to them.

Cheers,
Charles


> On 18/01/2019, at 7:31 AM, tu xiang <tuxiang2016 at outlook.com> wrote:
> 
> Dear Charles
> The old problem,When I use linear interpolation Pylith reports that it could not find final slip 
> at some point using spatial database. You told me that It should haven’t specified enough 
> points to interpolate the slip. I tried sparse mesh grid and dense spatial database, but it still
> reports errors. I read the examples provided by Pylith. I found that, the even the example 
> provide sparse spatial database, it can use linear interpolation. So, I do not think "It should haven’t specified enough 
> points to interpolate the slip. " is the reason.
> Do you think so?
> Best regards
> Tu
> 
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