Python底图仅在左下角绘制文本或注释

时间:2018-02-11 22:43:21

标签: python pandas matplotlib-basemap

问题是底图/ matplotlib总是在左下角绘制一个给定的文字......

我尝试了很多方法,但这不起作用:

# Set up plot
fig, ax = plt.subplots(figsize=(15,15))


m1 = Basemap(projection='merc',
             llcrnrlat=8.3,
             urcrnrlat=53.9,
             llcrnrlon=94.0,
             urcrnrlon=147.6,
             lat_ts=0,
             resolution='c')

m1.fillcontinents(color='#191919',lake_color='#000000') # dark grey land, black lakes
m1.drawmapboundary(fill_color='#000000')                # black background
m1.drawcountries(linewidth=0.1, color="w")              # thin white line for country borders
m1.drawstates(linewidth=0.1, color="w")


# Plot the data
mxy = m1(new_results["Longitude"].tolist(), new_results["Latitude"].tolist())
m1.scatter(mxy[0], mxy[1], s=300,c=np.divide(new_results["SumVolume"],100000000), lw=0, alpha=1, zorder=5,cmap='Reds')
ax.annotate("blablabla", (121.597366,25.105497),color='green')

#colorbar
plt.colorbar(label=r'24H Trading-Volume in MillionK$')
plt.clim(1, 21)
plt.title("Cryptocurrency capital movement - Asia")

剧情:

enter image description here

问题是什么?

    ax.annotate("blablabla", (121.597366,25.105497),color='green')

不像我想要的那样工作。坐标(121.597366,25.105497)是地图上的一个点。顺便说一下,哪个X,Y无关紧要。他总是把它写在左下角

1 个答案:

答案 0 :(得分:2)

由于我的评论已得到确认,我应该得出结论,问题的解决方法是关于坐标转换。问题部分的新代码是:

ax.annotate("blablabla", m1(121.597366,25.105497),color='green')