VGG data in 3D to Matlab

Added by Jan 5 months ago

Hi,

I would like to get the XYZ data for

https://portal.gplates.org/portal/vertical_gravity_gradient/

so that I could see it and work with it in Matlab.

I have the .1 data, how should I process it in GMT in order to obtain the .grd file (transfer to Matlab is no problem then)?

Thank you.

Jan


Replies (2)

RE: VGG data in 3D to Matlab - Added by Jan 5 months ago

This is what I need (just 3D): https://portal.gplates.org/cesium/

+ is there any way how to get both VGG and oceanic litosphere age data?

RE: VGG data in 3D to Matlab - Added by Sabin 5 months ago

Hi Jan,

To get the VGG data, go to the TOPEX site:
http://topex.ucsd.edu/grav_outreach/index.html

Download the data from their FTP site: ftp://topex.ucsd.edu/pub/global_grav_1min/
I believe the dataset you need is: ftp://topex.ucsd.edu/pub/global_grav_1min/curv.img.24.1

To use it in GMT, have a look at their Readme for example cases: ftp://topex.ucsd.edu/pub/global_grav_1min/README_V24.txt

For the age of oceanic crust, download it from here:
ftp://ftp.earthbyte.org/Data_Collections/Muller_etal_2016_AREPS/Muller_etal_2016_AREPS_Agegrids/

I forget what formats Matlab is friendly with, but I'm sure a bit of file conversion magic will sort that out. Hope that helps!

Cheers,
Sabin


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