r"""
Mercator projection
===================

The Mercator projection takes its name from the Flemish cartographer Gheert
Cremer, better known as Gerardus Mercator, who presented it in 1569. The
projection is a cylindrical and conformal, with no distortion along the
equator. A major navigational feature of the projection is that a line of
constant azimuth is straight. Such a line is called a rhumb line or loxodrome.
Thus, to sail from one point to another one only had to connect the points with
a straight line, determine the azimuth of the line, and keep this constant
course for the entire voyage. The Mercator projection has been used extensively
for world maps in which the distortion towards the polar regions grows
rather large.

**m**\ [*lon0*/\ [*lat0*/]]\ *scale* or **M**\ [*lon0*/\ [*lat0*/]]\ *width*

- **m** or **M**: Sets the projection type.
- *lon0*: Sets the central meridian [Optional].
- *lat0*: Sets the standard parallel [Optional]. When supplied, *lon0* must be
  supplied as well.
- *scale* or *width*: Sets the map size.
"""

# %%
import pygmt
from pygmt.params import Axis

fig = pygmt.Figure()
fig.coast(
    region=[0, 360, -80, 80],
    projection="M0/0/12c",
    frame=Axis(annot=True, tick=True, grid=True),
    land="gray80",
    water="steelblue",
)
fig.show()

# sphinx_gallery_tags = ["conformal"]