将地理地块从matplotlib导入到plotly

Question

import mpl_toolkits
import mpl_toolkits.basemap

#
# specify the map boundaries and projection type
#
mymap = mpl_toolkits.basemap.Basemap(llcrnrlon= -120, llcrnrlat=22,
                                     urcrnrlon=-58, urcrnrlat=48,
                                     projection="tmerc", lon_0 = -95, lat_0 = 35,
                                     resolution = "l")
fig_map = plt.figure(6, figsize=(10, 8))

mymap.fillcontinents(color = "lightgray")
mymap.drawcoastlines(color = "gray", linewidth=1.2)
mymap.drawcountries(color = "gray", linewidth=2)
mymap.drawstates(color = "gray")

mymap.drawmapboundary()

plt.show()

matplotlib给了我这个漂亮的图：

​

​

现在，我想将这个导入到plot intyerative中

py.iplot_mpl(fig_map, filename='DataScience/data-visualization/geographic_map_plot_1')

/usr/local/lib/python2.7/dist-packages/plotly/matplotlylib/renderer.py:479: UserWarning:

I found a path object that I don't think is part of a bar chart. Ignoring.

我收到几个奇怪的错误，如下所示：

---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
<ipython-input-79-561cd71f8586> in <module>()
----> 1 py.iplot_mpl(fig_map, filename='DataScience/data-visualization/geographic_map_plot_1')

/usr/local/lib/python2.7/dist-packages/plotly/plotly/plotly.pyc in iplot_mpl(fig, resize, strip_style, update, **plot_options)
    257             "object. Run 'help(plotly.graph_objs.Figure)' for more info."
    258         )
--> 259     return iplot(fig, **plot_options)
    260 
    261 

/usr/local/lib/python2.7/dist-packages/plotly/plotly/plotly.pyc in iplot(figure_or_data, **plot_options)
    113     if 'auto_open' not in plot_options:
    114         plot_options['auto_open'] = False
--> 115     res = plot(figure_or_data, **plot_options)
    116     urlsplit = res.split('/')
    117     username, plot_id = urlsplit[-2][1:], urlsplit[-1]  # TODO: HACKY!

/usr/local/lib/python2.7/dist-packages/plotly/plotly/plotly.pyc in plot(figure_or_data, validate, **plot_options)
    185                                          "seeing this error:\n\n{0}"
    186                                          "".format(err))
--> 187         if not figure['data']:
    188             raise exceptions.PlotlyEmptyDataError(
    189                 "Empty data list found. Make sure that you populated the "

KeyError: 'data'

我还没有在地理地图上看到任何plotly的例子！所以，任何帮助都是非常感谢的！

Answer 1

不幸的是，Plotly还不支持底图转换。

也就是说，有一个变通方法：

http://nbviewer.ipython.org/github/etpinard/plotly-misc-nbs/blob/etienne/plotly-maps.ipynb

简而言之，您需要从底图对象中提取x-y坐标，将它们附加到Plotly trace对象并调用plotly.plotly.plot()。

如果您对Plotly有任何其他问题，请随时与我联系。