ETOPO1 Custom grid extraction
https://www.ngdc.noaa.gov/mgg/global/ does not seem to have the option to download a custom grid in gmt netcdf format as it used to be. Is there a work around? I don't want to download the entire etopo1 grid with 383 MB. Thanks!
Nevermind, @earth_relief_rru.grd method worked.
gmt grd2cpt $topo_grd -Cglobe -L-500/7000 -T-500/7000/20 -Z > topo.cpt