2-11-grdcontour等值线

05 Jul 2018

To contour the file hawaii_grav.grd every 25 mGal on a Mercator map at 0.5 inch/degree, annotate every 50 mGal (using fontsize = 10), using 1 degree tickmarks, and draw 30 minute gridlines:

用法:

grdcontour hawaii_grav.grd −Jm0.5i −C25 −A50+f10 −B1g30m > hawaii_grav.ps