Questions about the location coordinate units in spatial database files

PyLith
1

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Dear Pylith team,
I want to know how the units of location coordinates are defined. I noticed that sometimes it is in kilometers and sometimes in meters. I checked the instructions and did not find the relevant instructions.
Thanks in advance for your reply.

2

PyLith uses SI units (e.g., meters). As a convenience feature, you can set up a SimpleDB to use other units instead. This is done by adjusting the to-meters parameter. For example, in your spatial database you could have:

cs-data = cartesian {
  to-meters = 1000.0
  space-dim = 3
}

This would multiply all of your coordinate units by 1000.0, which would allow you to specify coordinates in km.

Cheers,
Charles

4

Dear Chales,
Thank you for your fast response.
If the unit wants to be set to meters, then do you still need a “to-meters = 1” statement？

5

Yes, I believe so. If you look at the examples, I believe they all have a statement like that.

Cheers,
Charles