diff --git a/examples/gallery/embellishments/colorbars_multiple.py b/examples/gallery/embellishments/colorbars_multiple.py new file mode 100644 index 00000000000..e8781d29ba6 --- /dev/null +++ b/examples/gallery/embellishments/colorbars_multiple.py @@ -0,0 +1,43 @@ +""" +Multiple colormaps +------------------ +This gallery example shows how to create multiple colormaps for different subplots. To +better understand how GMT modern mode maintains several levels of colormaps, +please refer to :gmt-docs:`cookbook/features.html#gmt-modern-mode-hierarchical-levels` +for details. +""" +import pygmt + +fig = pygmt.Figure() + +# Load Earth relief data for the entire globe and a subset region +grid_globe = pygmt.datasets.load_earth_relief(resolution="01d") +subset_region = [-14, 30, 35, 60] +grid_subset = pygmt.datasets.load_earth_relief(resolution="10m", region=subset_region) + +# Define a 1-row, 2-column subplot layout. The overall figure dimensions is set +# to be 15 cm wide and 8 cm high. Each subplot is automatically labelled. +# The space between the subplots is set to be 0.5 cm. +with fig.subplot( + nrows=1, ncols=2, figsize=("15c", "8c"), autolabel=True, margins="0.5c" +): + # Activate the first panel so that the colormap created by the makecpt + # method is a panel-level CPT + with fig.set_panel(panel=0): + pygmt.makecpt(cmap="geo", series=[-8000, 8000]) + # "R?" means Winkel Tripel projection with map width automatically + # determined from the subplot width. + fig.grdimage(grid=grid_globe, projection="R?", region="g", frame=True) + fig.colorbar(frame=["a4000f2000", "x+lElevation", "y+lm"]) + # Activate the second panel so that the colormap created by the makecpt + # method is a panel-level CPT + with fig.set_panel(panel=1): + pygmt.makecpt(cmap="globe", series=[-6000, 3000]) + # "M?" means Mercator projection with map width also automatically + # determined from the subplot width. + fig.grdimage( + grid=grid_subset, projection="M?", region=subset_region, frame=True + ) + fig.colorbar(frame=["a2000f1000", "x+lElevation", "y+lm"]) + +fig.show()