# ValueError in python basemap?

So, this is my first time using a python basemap and yesterday I had a script that worked on a large dataset of about 30,000 points. When I came back today it stopped working and started giving me error values ββwhen I added a new dataset. I don't know what might be causing this, but I am getting a value error?

```
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
<ipython-input-5-16fa79cd74a5> in <module>()
12 longitude = np.array(df[(df['FLOAT'] == x)]['LONGITUDE'])
13 latitude = np.array(df[df['FLOAT'] == x]['LATITUDE'])
---> 14 m.plot(longitude,latitude, latlon=True)
15 parallels = np.arange(-90.,90.,10.)
16
C:\Anaconda\lib\site-packages\mpl_toolkits\basemap\__init__.pyc in with_transform(self, x, y, *args, **kwargs)
534 if self.projection in _cylproj or self.projection in _pseudocyl:
535 if x.ndim == 1:
--> 536 x = self.shiftdata(x)
537 elif x.ndim == 0:
538 if x > 180:
C:\Anaconda\lib\site-packages\mpl_toolkits\basemap\__init__.pyc in shiftdata(self, lonsin, datain, lon_0)
4775 thresh = 360.-londiff_sort[-2]
4776 itemindex = len(lonsin)-np.where(londiff>=thresh)[0]
-> 4777 if itemindex:
4778 # check to see if cyclic (wraparound) point included
4779 # if so, remove it.
ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()
```

Who has the key? Maybe there is a data value in the array that is not working correctly?

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1 answer

This is caused by basemap error # 214 .

At the time of writing (2016-03-17) this bug is still open, so you need to find a workaround:

- Sorting data before plotting. Of course, this may not be desirable if you need to draw actual line segments.
- Divide the data into subsections like you did.

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