color for missing data, move to matplotlib 3.1.0

[Reimar Bauer]

in matplotlib 3 we have sometime not white as color for missing data.

I have this for example with demodata Temperature and the attached flight_track

[Anveshan Lal]

@ReimarBauer Can I work on this issue?

[Reimar Bauer]

@funnelferry this is currently a placeholder issue, because this needs to be tracked down in an other component e.g. basemap, matplotlib and can only be done if you can reproduce this.

[Reimar Bauer]

in matplotlib 3 we have sometime not white as color for missing data.

I have this for example with demodata Temperature and the attached flight_track

[Reimar Bauer]

I have this behaviour on a fresh installation of 1.8.0 now.

[Reimar Bauer]

it seems to work with matplotlib==3.0.2

[Reimar Bauer]

matplotlib version pinned on conda-forge and build 1 created

[Reimar Bauer]

we should also check recent v3.1.0

[Reimar Bauer]

3.1.0 shows a traceback

Traceback (most recent call last):
File "/home/user/miniconda3/envs/mss180/lib/python3.7/site-packages/mslib/msui/mss_pyui.py", line 451, in create_new_view
view_window = topview.MSSTopViewWindow(model=self.active_flight_track)
File "/home/user/miniconda3/envs/mss180/lib/python3.7/site-packages/mslib/msui/topview.py", line 166, in init
self.setupUi(self)
File "/home/user/miniconda3/envs/mss180/lib/python3.7/site-packages/mslib/msui/qt5/ui_topview_window.py", line 21, in setupUi
self.mpl = MplTopViewWidget(self.centralwidget)
File "/home/user/miniconda3/envs/mss180/lib/python3.7/site-packages/mslib/msui/mpl_qtwidget.py", line 1181, in init
sideview=False, parent=parent, canvas=MplTopViewCanvas())
File "/home/user/miniconda3/envs/mss180/lib/python3.7/site-packages/mslib/msui/mpl_qtwidget.py", line 481, in init
self.navbar = NavigationToolbar(self.canvas, self, sideview)
File "/home/user/miniconda3/envs/mss180/lib/python3.7/site-packages/mslib/msui/mpl_qtwidget.py", line 235, in init
super(NavigationToolbar, self).init(canvas, parent, coordinates)
File "/home/user/miniconda3/envs/mss180/lib/python3.7/site-packages/matplotlib/backends/backend_qt5.py", line 685, in init
NavigationToolbar2.init(self, canvas)
File "/home/user/miniconda3/envs/mss180/lib/python3.7/site-packages/matplotlib/backend_bases.py", line 2627, in init
self._init_toolbar()
File "/home/user/miniconda3/envs/mss180/lib/python3.7/site-packages/mslib/msui/mpl_qtwidget.py", line 429, in _init_toolbar
self.buttons = {}
File "/home/user/miniconda3/envs/mss180/lib/python3.7/site-packages/matplotlib/cbook/deprecation.py", line 218, in set
return super().set(instance, value)
AttributeError: can't set attribute

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[Reimar Bauer]

in matplotlib 3 we have sometime not white as color for missing data.

I have this for example with demodata Temperature and the attached flight_track

[Joern Ungermann]

See issue #435

[Joern Ungermann]

The visualisation issue is seemingly located in the frontend. It is not only the missing data, but the data are also “coloured” wrong as if tinted by the viridis colourmap.

[Joern Ungermann]

Probably related to a simplification of PIL image handling. It seemingly uses the “asarray” method for conversion, which was rather recently introduced, but this does not work “as expected” for paletted images.

[Reimar Bauer]

Fixed display issue of PNG images in the client with current matplotlib

Matplotlib display current PNG images employing palette encoding according to the color numbers using the default colormap viridis. Trigger a conversion to RGBA before display to fix issues.

Fix issue #397

→ <<cset d015b3710f91>>