Color patterns on maps
Glat = gmt("grdmath -Rd -I1 -r Y COSD 2 POW =")
Glon = gmt("grdmath -Rd -I1 -r X =")
lat_cpt = makecpt(color="white,blue", range=(0,1), continuous=true, no_bg=true)
lon_cpt = makecpt(cmap=:rainbow, range=(-180,180))
grdimage(Glat, cmap=lat_cpt, frame=:none, interp=:l, proj=:sinu,
figsize=16, y_off=18)
coast!(area=5000, clip=:land)
grdimage!(Glon, cmap=lon_cpt, interp=:l)
coast!(clip=:end)
coast!(area=5000, shore=:thinnest)
text!(text_record([0 20], "16TH INTERNATIONAL"),
font=(32,"Helvetica-Bold","red=thinner"))
text!(text_record([0 -10], "GMT CONFERENCE"),
font=(32,"Helvetica-Bold","red=thinner"))
text!(text_record([0 -30], "Honolulu, Hawaii, April 1, 2019"),
font=(18,"Helvetica-Bold","green=thinner"))
# Then show example of color patterns and placing a PostScript image
coast!(area=5000, land=(pattern=86, bg=:yellow, fg=:red, dpi=100),
water=(pattern="@circuit.png", dpi=100), frame=:none, y_off=-8)
text!(text_record([0 30], "SILLY USES OF"),
font=(32,"Helvetica-Bold","lightgreen=thinner"))
text!(text_record([0 -30], "COLOR PATTERNS"),
font=(32,"Helvetica-Bold","magenta=thinner"))
psimage!("@GMT_covertext.eps", D="jCM+w3i")
# Finally repeat 1st plot but exchange the patterns
grdimage!(Glon, cmap=lon_cpt, frame=:none, interp=:l, y_off=-8)
coast!(area=5000, clip=:land)
grdimage!(Glat, cmap=lat_cpt, interp=:l)
coast!(clip=:end)
coast!(area=5000, shore=:thinnest)
text!(text_record([0 20], "15TH INTERNATIONAL"),
font=(32,"Helvetica-Bold","red=thinner"))
text!(text_record([0 -10], "GMT CONFERENCE"),
font=(32,"Helvetica-Bold","red=thinner"))
text!(text_record([0 -30], "Honolulu, Hawaii, April 1, 2018"),
font=(18,"Helvetica-Bold","green=thinner"), show=true)
See also GMT ex17