Bug #981

GMT5.3 rotconverter behavior

Added by Chenjian over 3 years ago. Updated over 3 years ago.

Status:ClosedStart date:2016-10-17
Priority:NormalDue date:
Assignee:Paul% Done:

100%

Category:-
Target version:Candidate for next bugfix release
Affected version:5.x-svn Platform:Linux

Description

Hi,

5.3 rotconverter's behavior is different from 5.2.2.

For example, using 5.2.2 the following line works:

rotconverter BAL-EUR EUR-NAM

It doesn't for 5.3 any more (

rotconverter EUR-NAM
works though).

Sincerely, Chenjian

History

#1 Updated by Paul over 3 years ago

Aren't you missing an operator? You need a plus or minus between those two rotations.

#2 Updated by Chenjian over 3 years ago

Hi Paul,
Thanks for your reply. So here to calculate rotations for Baltica relative to a fixed North America using the plate circuit Baltica-Europe-NorthAmerica, based on a rotations database, as the last example shown in the rotconverter doc, it can be

gmt rotconverter BAL-EUR EUR-NAM
. I also tried 
gmt rotconverter BAL-EUR + EUR-NAM
in 5.3, but still this
rotconverter: Error: Could not find rotations for the plate pair BAL - EUR
pops out. In 5.2.2, it works since there is indeed rotation data between BAL-EUR, although for younger times BAL and EUR are fixed to each other.
Sincerely, Chenjian

#3 Updated by Joaquim over 3 years ago

Just a side note to clarify that there are not (yet) GMT5.3 and there was never (nor will be) a GMT5.2.2 versions.

#4 Updated by Paul over 3 years ago

  • Status changed from New to In Progress
  • Assignee set to Paul

Just to confirm that the BAL-EUR is in the Gplates table but it is a null rotation:

302  0.0    0.0    0.0    0.0  301 !BAL-EUR Baltic Shield-Northern European Craton
302 231.0    0.0    0.0    0.0  301 !BAL-EUR

and I think rotconverter (now) skips null rotations. I will have a look. Meantime you just ignore using BAL-EUR since it would do nothing.

#5 Updated by Paul over 3 years ago

  • Status changed from In Progress to Resolved
  • Target version set to Candidate for next bugfix release
  • % Done changed from 0 to 100

We now allow null-rotations to be loaded again. In r17215.

#6 Updated by Joaquim over 3 years ago

  • Status changed from Resolved to Closed

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