Okular incorrectly displays figures 7 and 13 in http://www.mdpi.com/2072-4292/10/5/804/pdf. The map plots are empty, i.e. coastlines and grids are ok, but data is not displayed.
Confirmed for Okular 1.3.2, poppler 0.52. Looks like a poppler bug because qpdfview behavior is similar.
Can this be a Splash backend issue? I can confirm the problem with Okular 1.4.70 and poppler 0.63. However, I do see the missing data when I switch to the poppler Arthur backend.
Do you mean this plot? https://i.imgur.com/5TomM2P.png What is missing?
Created attachment 113745 [details] Figure 7, empty plots
Created attachment 113746 [details] Figure 7, expected plots
No that plot is fine, Figures 7 and 13 are empty (see attachments).
It's a poppler bug: https://bugs.freedesktop.org/show_bug.cgi?id=107112
Nice, thanks for looking into this!