[GRASS-user] Estimating import time for large data file

[Rich Shepard]

On Fri, 29 May 2020, Moritz Lennert wrote:

> Importing such a large file can take a lot of time because of the cleaning in 
> order to get it into GRASS GIS' topological format.

Moritz,

I assumed it would taka a while, but it seemed to be stuck. Perhaps because
that polygon was large, complex, and needed a lot of cleaning.

> I think it really depends on the specific file in terms of geometry
> complexity and cleanliness, so difficult to pre-determine. I regularly
> launch large import jobs overnight.

Then that's what I'll do tonight: I'll start it running in screen before I
log off and let it do it's thing for as long as it wants.

> You should see an information about its progress in the different cleaning
> steps (note that some cleaning is repeated).

I was using the GUI because I needed to create a new location and have
forgotten how to create a new location and mapset from the command line.

> If you are sure you do not want to do any polygon cleaning during import, you 
> can use the -c flag. But you will have to handle the result with care.

Actually, I much prefer to let GRASS clean as it goes.

Thanks very much for the knowledge.

Stay well,

Rich