gmt get -Dgshhg and -Ddcw

[seisman]

Description of the desired feature

Perhaps gmt get can support following commands:

gmt get -Ddcw
gmt get -Dgshhg

Ideally it should be possible to specify the resolution for GSHHG data.

[stale]

This issue has been automatically marked as stale because it has not had activity in the last 90 days. It will be closed if no further activity occurs within 7 days. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had activity in the last 90 days. It will be closed if no further activity occurs within 7 days. Thank you for your contributions.