Frames, ticks, titles, and labels
Setting the style of the map frames, ticks, etc, is handled by the
parameter that all plotting methods of
By default, PyGMT does not add a frame to your plot. For example, we can plot the coastlines of the world with a Mercator projection:
To add the default GMT frame to the plot, use
pygmt.Figure.basemap or any other plotting method:
Ticks and grid lines
The automatic frame (
frame="a") sets the default GMT
style frame and automatically determines tick labels from the plot region.
Add automatic grid lines to the plot by adding a
The figure title can be set by passing +ttitle to the
pygmt.Figure.basemap. Passing multiple arguments to
frame can be done by using a list, as show in the example below.
To use a title with multiple words, the title must be placed inside another
set of quotation marks. To prevent the quotation marks from appearing in the
figure title, the
frame parameter can be passed in single quotation marks
and the title can be passed in double quotation marks.
Axis labels can be set by passing x+llabel (or starting with y if
labeling the y-axis) to the
frame parameter of
pygmt.Figure.basemap. By default, all 4 map boundaries (or plot axes)
are plotted with both tick marks and axis labels. The axes are named as
W (west/left), S (south/bottom), N (north/top), and
E (east/right) sides of a figure. If an upper-case axis name is passed,
the axis is plotted with tick marks and axis labels. A lower case axis name
plots only the axis and tick marks.
The example below uses a Cartesian projection, as GMT does not allow axis labels to be set for geographic maps.
Total running time of the script: ( 0 minutes 8.785 seconds)