[GPlates-discuss] How to check the min and max velocities in GPlates?

Thu Jan 28 19:52:46 AEDT 2016

Nan,

> This what I got:
> ******************************
> gmtinfo velocity_200Ma.xy
> velocity_00.xy: N = 684	<-180/170>	<-90/90>	<101/926> <-
> 1125.54425857/1351.60786166>	<-1087.64611672/1091.5579678> <-
> 1080.04121402/1782.10260855>
> ******************************

seems that the (European) overnight discussions with John, Sabin & Bruce have helped you to solve the issues. Let us know whether this has all worked out fine so in case others want to replicate this.

Best,
Christian

> -----Original Message-----
> From: gplates-discuss-bounces at mailman.sydney.edu.au [mailto:gplates-
> discuss-bounces at mailman.sydney.edu.au] On Behalf Of Sabin Zahirovic
> Sent: Thursday, 28 January 2016 11:34 AM
> To: GPlates general discussion mailing list <gplates-
> discuss at mailman.sydney.edu.au>
> Subject: Re: [GPlates-discuss] How to check the min and max velocities in
> GPlates?
> 
> Hi Nan,
> 
> GPlates should be able to export the lon, lat, plate id of mesh node, vel
> magnitude, and vel azimuth.
> 
> You can use AWK to extract by the particular Plate ID, and then use gmt
> gmtinfo (thanks for that update, good to know of the name change) to get
> the min/max of that plate¹s velocities.
> 
> The high velocities may actually be a problem in the plate motion model.
> That¹s because the rotations are all cut off at 200 Ma, and GPlates
> cannot properly figure out the stage rotations and therefore velocities
> for
> 201-200 Ma. You should be able to see that even visually with the
> velocity arrows in GPlates. Say if you want velocities at 190 Ma, GPlates
> interpolates the stage rotations, and therefore velocities, for 191 to
> 190 Ma. If this is the case, start your model run and velocity export at
> 199 Ma from GPlates.
> 
> Cheers,
> Sabin
> 
> 
> --
> 
> DR SABIN ZAHIROVIC | Postdoctoral Research Associate School of
> Geosciences | Faculty of Science
> 
> 
> 
> THE UNIVERSITY OF SYDNEY
> Rm 403, Madsen Building F09 | The University of Sydney | NSW | 2006 M +61
> 416 775 589 P +61 2 9351 3625 E sabin.zahirovic at sydney.edu.au | W
> http://www.earthbyte.org <http://www.earthbyte.org/> | R
> http://www.researchgate.net/profile/Sabin_Zahirovic
> F https://www.facebook.com/earthbyte | T
> https://twitter.com/EarthByteGroup
> 
> CRICOS 00026A
> This email plus any attachments to it are confidential. Any unauthorised
> use is strictly prohibited. If you receive this email in error, please
> delete it and any attachments.
> 
> 
> 
> 
> On 28/01/2016, 2:21 PM, "gplates-discuss-bounces at mailman.sydney.edu.au on
> behalf of Nan Zhang" <gplates-discuss-bounces at mailman.sydney.edu.au on
> behalf of nan.zhang at curtin.edu.au> wrote:
> 
> >Hi Christian,
> >
> >After I open the Kinematics tool (attached snapshot), I clicked the
> >"velocity magnitude" and did get any response.
> >
> >When you mentioned "chose GMT (*.xy) as output and then batch process
> >the output files with GMT's "gmt gmtinfo" (formerly minmax).", what is
> >the exact command line for "batch the output files with gmtinfo", given
> >my file name velocity_200Ma.xy?
> >
> >I am trying to find the max velocity magnitude for different time
> >frames, because when I put Seton's model to the velocity .gpml file for
> >ASPECT, ASPECT returns me the max velocity at 200Ma is 28 m/yr?
> >
> >Bests,
> >Nan
> >
> >
> >
> >-----Original Message-----
> >From: gplates-discuss-bounces at mailman.sydney.edu.au
> >[mailto:gplates-discuss-bounces at mailman.sydney.edu.au] On Behalf Of
> >Christian.Heine at shell.com
> >Sent: Wednesday, 27 January 2016 10:54 PM
> >To: gplates-discuss at mailman.sydney.edu.au
> >Subject: Re: [GPlates-discuss] How to check the min and max velocities
> >in GPlates?
> >
> >Nan,
> >
> >in GPlates: Go to Utilities -> Kinematics tool (or CTRL+k). This is the
> >only place in the GUI where you can directly look at/query velocity
> >information. However, that tool only allows you to use a single feature.
> >If you want to do this for more features and in a more extensive way,
> >you'd have to use the data mining capabilities and Python to code up
> >workflows yourself (or even extend this using the Qt interface to build
> >a GUI widget).
> >
> >The way Bruce and I suggested earlier will allow you to do a batch
> >analysis of velocity data outside of GPlates. I'd say this is probably
> >the fastest and easiest option to get this done. In case that doesn't
> >answer your questions you maybe have to explain in more detail of what
> >you are trying to achieve.
> >
> >Christian (not Christina ;-)
> >
> >
> >
> >> -----Original Message-----
> >> From: gplates-discuss-bounces at mailman.sydney.edu.au [mailto:gplates-
> >> discuss-bounces at mailman.sydney.edu.au] On Behalf Of Nan Zhang
> >> Sent: Wednesday, 27 January 2016 2:50 PM
> >> To: GPlates general discussion mailing list
> >> Subject: Re: [GPlates-discuss] How to check the min and max
> >> velocities in GPlates?
> >>
> >> Hi Sabin, I read through your paper. It is a good paper, while it
> >> does address my issue. My question is how to find a tool in GPlates
> >> interface, to do a statistics for the loaded velocity field (the max,
> >> min, and mean velocity magnitude). Besides Christina's suggestion
> >> early on, is there a direct tool in GPlates?
> >>
> >>
> >>
> >>
> >>
> >> ________________________________
> >>
> >> From: gplates-discuss-bounces at mailman.sydney.edu.au <gplates-discuss-
> >> bounces at mailman.sydney.edu.au> on behalf of Sabin Zahirovic
> >> <sabin.zahirovic at sydney.edu.au>
> >> Sent: Wednesday, 27 January 2016 4:28 PM
> >> To: GPlates general discussion mailing list
> >> Subject: Re: [GPlates-discuss] How to check the min and max
> >> velocities in GPlates?
> >>
> >> Hi Nan,
> >>
> >> Please check this paper that talks about all of these things:
> >> http://www.earthbyte.org/tectonic-speed-limits-from-plate-kinematic-
> >> reconstructions/
> >>
> >> <http://www.earthbyte.org/tectonic-speed-limits-from-plate-kinematic-
> >> reconstructions>
> >> Tectonic speed limits from plate kinematic reconstructions ...
> >> <http://www.earthbyte.org/tectonic-speed-limits-from-plate-kinematic-
> >> reconstructions>
> >> www.earthbyte.org
> >> Citation Zahirovic, S., Müller, R. D., Seton, M., & Flament, N.
> (2015).
> >> Tectonic speed limits from plate kinematic reconstructions. Earth and
> >> Planetary Science ...
> >>
> >> http://www.sciencedirect.com/science/article/pii/S0012821X15001235
> >>
> >> Hope that helps!
> >>
> >> Cheers,
> >> Sabin
> >>
> >>
> >> --
> >>
> >> DR SABIN ZAHIROVIC | Postdoctoral Research Associate School of
> >> Geosciences | Faculty of Science
> >>
> >>
> >> THE UNIVERSITY OF SYDNEY
> >> Rm 403, Madsen Building F09 | The University of Sydney | NSW | 2006 M
> >> +61
> >> 416 775 589 P +61 2 9351 3625 E sabin.zahirovic at sydney.edu.au | W
> >> http://www.earthbyte.org <http://www.earthbyte.org/>  | R
> >> http://www.researchgate.net/profile/Sabin_Zahirovic
> >> <http://www.researchgate.net/profile/Sabin_Zahirovic>
> >> F https://www.facebook.com/earthbyte | T
> >> https://twitter.com/EarthByteGroup
> >>
> >> CRICOS 00026A
> >> This email plus any attachments to it are confidential. Any
> >> unauthorised use is strictly prohibited. If you receive this email in
> >> error, please delete it and any attachments.
> >>
> >> From: <gplates-discuss-bounces at mailman.sydney.edu.au> on behalf of
> >> Nan Zhang <nan.zhang at curtin.edu.au>
> >> Reply-To: GPlates general discussion mailing list <gplates-
> >> discuss at mailman.sydney.edu.au>
> >> Date: Wednesday, 27 January 2016 at 7:13 PM
> >> To: "gplates-discuss at mailman.sydney.edu.au" <gplates-
> >> discuss at mailman.sydney.edu.au>
> >> Subject: [GPlates-discuss] How to check the min and max velocities in
> >> GPlates?
> >>
> >>
> >>
> >> Hi all,
> >>
> >>
> >>
> >> I loaded Seton et al., 2012 data to generate some plate velocity
> >>files  from 200Ma to the present day. One thing I want to check is the
> >>minimum and maximum velocity magnitudes. Who can give me some
> >>instruction?
> >>
> >>
> >>
> >> Bests,
> >>
> >> Nan
> >
> >_______________________________________________
> >GPlates-discuss mailing list
> >GPlates-discuss at mailman.sydney.edu.au
> >http://mailman.sydney.edu.au/mailman/listinfo/gplates-discuss
> 
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