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

Thu Jan 28 13:17:27 AEDT 2016

Hi Sabin
  Yes, Excel could provide results via max/min functions but one would need to manually limit which plates are shown and used in calculations. The advantage with a database query is that one can get results summarised for all plates in one go.

Bruce

Bruce Eglington
Murray Pyke Chair
Geological Sciences
University of Saskatchewan
114 Science Place
Saskatoon
SK S7N 5E2
Canada

email: bruce.eglington at usask.ca
tel: +1-306-966-5732

-----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: January-27-16 8:14 PM
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 Bruce,

Ah yes, that's also a really good idea! For anyone who doesn't have MS Access, you can even do it in MS Excel - just extract by Plate ID.

At the bottom of the plate speed column, enter a formula like "=MAX(cell_range)" to get the max value, and MIN for the minimum.

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, 1:00 PM, "gplates-discuss-bounces at mailman.sydney.edu.au on behalf of Eglington, Bruce" <gplates-discuss-bounces at mailman.sydney.edu.au
on behalf of bruce.eglington at usask.ca> wrote:

>Hi Sabin
>  It would be even easier in a database. For somebody using a Windows 
>machine the easiest would be Microsoft Access (which also happens to be 
>the format used for ESRI Personal Geodatabases). Just import the XY 
>data, including the plateid's, then run a simple query to provide min 
>and max velocity values for every plate or limit the plateid's as part 
>of the query.
>
>Bruce
>
>Bruce Eglington
>Murray Pyke Chair
>Geological Sciences
>University of Saskatchewan
>114 Science Place
>Saskatoon
>SK S7N 5E2
>Canada
>
>email: bruce.eglington at usask.ca
>tel: +1-306-966-5732
>
>
>
>-----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: January-27-16 5:10 PM
>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 guys!
>
>Nan, these have been really good questions - it¹ll be useful for other 
>people. Sorry I have to admit that I misunderstood your question on my 
>first reading, but thankfully Christian stepped in with some better 
>advice haha!
>
>What I have used in the past to extract the min and max velocities is 
>to first export the plate velocities from GPlates. Then I use GMTSELECT 
>to extract the velocities of the plate in question, and then I use 
>MINMAX (another GMT application) to give me the upper and lower bounds 
>on velocities. This would be harder to do on Windows, but easy on Linux 
>and Mac if you have GMT installed.
>
>I have written a short tutorial on how to install GMT on Mac OS X 
>easily
>here:
>https://geodynamix.wordpress.com/2016/01/12/easily-install-and-use-gene
>ric
>-
>mapping-tools-gmt-on-mac-os-x/
>
>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
>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, 1:54 AM, "gplates-discuss-bounces at mailman.sydney.edu.au 
>on behalf of Christian.Heine at shell.com"
><gplates-discuss-bounces at mailman.sydney.edu.au on behalf of 
>Christian.Heine at shell.com> wrote:
>
>>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
>>
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