GMT6 modern mode - access Sandwell-Smith gravity remotely

Q&A
1

Hello all,

Just installed GMT version 6, and a very impressive job indeed! Well done to all the developers.

A quick query regarding remote access of datasets. Is it possible to apply the same methodology as discussed in the examples from the paper, e.g.:
gmt grdimage @earth_relief_01m - by specifying the full URL and not downloading the entire file?

I noticed recently that on the FTP site for the gravity data, there is now an option for grav_28.1.nc in addition to the standard .img files. Presently, I have used img2grd from the full file downloaded to create a region of interest.

Sorry for the basic query re: version 6, spent a long time in classic GMT mode!

Lester

2

Hi,

I’m afraid it’s not possible to remotely read sub-regions of a netcdf grid. It probably can be done for some other formats via GDAL but for nc I know there are limitations on Windows driver that don’t let it work well.

3

Depending on the outcome of certain NSF and NASA proposals this may become much simpler down the road.