There appears to be an issue/feature in matplotlib triangulation which causes it to miss large numbers of points where then data are far from the origin. Example data set and matplotlib script attached. Attached image is using matplotlib version 1.5.1. Apparently not an issue in 1.3.1
Workaround for the contour plugin is to translate the data to the origin before contouring. Not sure when this will work and when not.
There appears to be an issue/feature in matplotlib triangulation which causes it to miss large numbers of points where then data are far from the origin. Example data set and matplotlib script attached. Attached image is using matplotlib version 1.5.1. Apparently not an issue in 1.3.1
Workaround for the contour plugin is to translate the data to the origin before contouring. Not sure when this will work and when not.
Reported in https://github.com/matplotlib/matplotlib/issues/8842
tricont.zip![tricont](https://user-images.githubusercontent.com/631058/27842438-3383bb4e-615e-11e7-9267-1158f5e8cdbb.png)