Gridlines and tick labels

These examples demonstrate how to quickly add longitude and latitude gridlines and tick labels on a non-rectangular projection.

As you can see on the first example, longitude labels may be drawn on left and right sides, and latitude labels may be drawn on bottom and top sides. Thanks to the dms keyword, minutes are used when appropriate to display fractions of degree.

In the second example, labels are still drawn at the map edges despite its complexity, and some others are also drawn within the map boundary.

In the third example, labels are drawn only on the left and bottom sides.

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import matplotlib.pyplot as plt

import cartopy.crs as ccrs
import cartopy.feature as cfeature


def main():

    rotated_crs = ccrs.RotatedPole(pole_longitude=120.0, pole_latitude=70.0)
    ax0 = plt.axes(projection=rotated_crs)
    ax0.set_extent([-6, 1, 47.5, 51.5], crs=ccrs.PlateCarree())
    ax0.add_feature(cfeature.LAND.with_scale('110m'))
    ax0.gridlines(draw_labels=True, dms=True, x_inline=False, y_inline=False)

    plt.figure(figsize=(6.9228, 3))
    ax1 = plt.axes(projection=ccrs.InterruptedGoodeHomolosine())
    ax1.coastlines(resolution='110m')
    ax1.gridlines(draw_labels=True)

    plt.figure(figsize=(7, 3))
    ax2 = plt.axes(projection=ccrs.PlateCarree())
    ax2.coastlines(resolution='110m')
    gl = ax2.gridlines(draw_labels=True)
    gl.top_labels = False
    gl.right_labels = False
    plt.show()


if __name__ == '__main__':
    main()