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"""
Tick Labels
-----------
This example demonstrates adding tick labels to maps on rectangular
projections using special tick formatters.
"""
import matplotlib.pyplot as plt
import cartopy.crs as ccrs
from cartopy.mpl.ticker import LatitudeFormatter, LongitudeFormatter
def main():
fig = plt.figure(figsize=(8, 10))
# Label axes of a Plate Carree projection with a central longitude of 180:
ax1 = fig.add_subplot(2, 1, 1,
projection=ccrs.PlateCarree(central_longitude=180))
ax1.set_global()
ax1.coastlines()
ax1.set_xticks([0, 60, 120, 180, 240, 300, 360], crs=ccrs.PlateCarree())
ax1.set_yticks([-90, -60, -30, 0, 30, 60, 90], crs=ccrs.PlateCarree())
lon_formatter = LongitudeFormatter(zero_direction_label=True)
lat_formatter = LatitudeFormatter()
ax1.xaxis.set_major_formatter(lon_formatter)
ax1.yaxis.set_major_formatter(lat_formatter)
# Label axes of a Mercator projection without degree symbols in the labels
# and formatting labels to include 1 decimal place:
ax2 = fig.add_subplot(2, 1, 2, projection=ccrs.Mercator())
ax2.set_global()
ax2.coastlines()
ax2.set_xticks([-180, -120, -60, 0, 60, 120, 180], crs=ccrs.PlateCarree())
ax2.set_yticks([-78.5, -60, -25.5, 25.5, 60, 80], crs=ccrs.PlateCarree())
lon_formatter = LongitudeFormatter(number_format='.1f',
degree_symbol='',
dateline_direction_label=True)
lat_formatter = LatitudeFormatter(number_format='.1f',
degree_symbol='')
ax2.xaxis.set_major_formatter(lon_formatter)
ax2.yaxis.set_major_formatter(lat_formatter)
plt.show()
if __name__ == '__main__':
main()
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