"""
三、墨卡托下经纬度的添加
在官网上提供了墨卡托下添加经纬度标签的样例。
来源：https://cloud.tencent.com/developer/article/1790266
20221215
"""
import matplotlib.pyplot as plt
import numpy as np
import cartopy.crs as ccrs
import cartopy.feature as cf
from cartopy.mpl.gridliner import LONGITUDE_FORMATTER, LATITUDE_FORMATTER


plt.rcParams['font.sans-serif'] = ['SimHei']
fig = plt.figure(figsize=(2, 2), dpi=400)
ax = fig.add_axes([0, 0, 1, 1], projection=ccrs.LambertConformal(central_longitude=110))
ax.spines['geo'].set_linewidth(0.5)  # 调节边框粗细
ax.set_extent([100, 150, 5, 55], crs=ccrs.PlateCarree())
ax.set_title('cartopy.feature', fontsize=5)
################################################################
ax.add_feature(cf.BORDERS.with_scale('10m'), lw=0.4)
ax.add_feature(cf.STATES.with_scale('110m'))
ax.add_feature(cf.COASTLINE.with_scale('10m'), lw=0.4)
ax.add_feature(cf.LAKES.with_scale('110m'))
ax.add_feature(cf.LAND.with_scale('110m'))
ax.add_feature(cf.OCEAN.with_scale('110m'))
ax.add_feature(cf.RIVERS.with_scale('110m'), lw=0.4)
################################################################
# LAKES_border = cf.NaturalEarthFeature('physical', 'lakes', '10m', edgecolor='black', facecolor='never')
# ax.add_feature(LAKES_border, linewidth=0.1)

# gl = ax.gridlines(draw_labels=True, linestyle=":", linewidth=0.3, x_inline=False, y_inline=False, color='k')
# gl.top_labels = False  # 关闭上部经纬标签
# gl.right_labels = False
# gl.xformatter = LONGITUDE_FORMATTER  # 使横坐标转化为经纬度格式
# gl.yformatter = LATITUDE_FORMATTER
# gl.xlocator = mticker.FixedLocator(np.arange(80, 140, 10))
# gl.ylocator = mticker.FixedLocator(np.arange(10, 60, 10))
# gl.xlabel_style = {'size': 4}  # 修改经纬度字体大小
# gl.ylabel_style = {'size': 4}


fig_name = "./img/Feature_COASTLINE_10m.png"
plt.savefig(fig_name,
            dpi=512,  # 分辨率，每英寸的点数 512
            bbox_inches='tight',
            pad_inches=0.1,  # (默认: 0.1)所保存图形周围的填充量
            transparent=True,
            facecolor='auto',  # 默认 auto
            edgecolor='r',  # 默认 auto
            # papertype='letter',  # 3.6之后不支持了。纸张大小，仅支持postscript输出。取值范围为:
                             # {'letter', 'legal', 'executive', 'ledger', 'a0' - 'a10', 'b0' - 'b10'}。默认值为None。
            orientation='portrait')  # {‘landscape,’ ‘portrait’}: 目前只有后端支持