#StackBounty: #tikz-pgf How to set the isolines in a contour plot and observable with non-Acroread previewer

Bounty: 100

I would like to add the isolines to the right plot generated by these lines

documentclass{article}
usepackage{pgfplots}
pgfplotsset{width=7cm,compat=1.15,
colormap={parula}{%
        rgb=(0.2081,0.1663,0.5292)rgb=(0.2116,0.1898,0.5777)rgb=(0.2123,0.2138,0.627)
        rgb=(0.2081,0.2386,0.6771)rgb=(0.1959,0.2645,0.7279)rgb=(0.1707,0.2919,0.7792)
        rgb=(0.1253,0.3242,0.8303)rgb=(0.0591,0.3598,0.8683)rgb=(0.0117,0.3875,0.882)
        rgb=(0.006,0.4086,0.8828) rgb=(0.0165,0.4266,0.8786)rgb=(0.0329,0.443,0.872)
        rgb=(0.0498,0.4586,0.8641)rgb=(0.0629,0.4737,0.8554)rgb=(0.0723,0.4887,0.8467)
        rgb=(0.0779,0.504,0.8384) rgb=(0.0793,0.52,0.8312)  rgb=(0.0749,0.5375,0.8263)
        rgb=(0.0641,0.557,0.824)  rgb=(0.0488,0.5772,0.8228)rgb=(0.0343,0.5966,0.8199)
        rgb=(0.0265,0.6137,0.8135)rgb=(0.0239,0.6287,0.8038)rgb=(0.0231,0.6418,0.7913)
        rgb=(0.0228,0.6535,0.7768)rgb=(0.0267,0.6642,0.7607)rgb=(0.0384,0.6743,0.7436)
        rgb=(0.059,0.6838,0.7254) rgb=(0.0843,0.6928,0.7062)rgb=(0.1133,0.7015,0.6859)
        rgb=(0.1453,0.7098,0.6646)rgb=(0.1801,0.7177,0.6424)rgb=(0.2178,0.725,0.6193)
        rgb=(0.2586,0.7317,0.5954)rgb=(0.3022,0.7376,0.5712)rgb=(0.3482,0.7424,0.5473)
        rgb=(0.3953,0.7459,0.5244)rgb=(0.442,0.7481,0.5033) rgb=(0.4871,0.7491,0.484)
        rgb=(0.53,0.7491,0.4661)  rgb=(0.5709,0.7485,0.4494)rgb=(0.6099,0.7473,0.4337)
        rgb=(0.6473,0.7456,0.4188)rgb=(0.6834,0.7435,0.4044)rgb=(0.7184,0.7411,0.3905)
        rgb=(0.7525,0.7384,0.3768)rgb=(0.7858,0.7356,0.3633)rgb=(0.8185,0.7327,0.3498)
        rgb=(0.8507,0.7299,0.336) rgb=(0.8824,0.7274,0.3217)rgb=(0.9139,0.7258,0.3063)
        rgb=(0.945,0.7261,0.2886) rgb=(0.9739,0.7314,0.2666)rgb=(0.9938,0.7455,0.2403)
        rgb=(0.999,0.7653,0.2164) rgb=(0.9955,0.7861,0.1967)rgb=(0.988,0.8066,0.1794)
        rgb=(0.9789,0.8271,0.1633)rgb=(0.9697,0.8481,0.1475)rgb=(0.9626,0.8705,0.1309)
        rgb=(0.9589,0.8949,0.1132)rgb=(0.9598,0.9218,0.0948)rgb=(0.9661,0.9514,0.0755)
        rgb=(0.9763,0.9831,0.0538)
        }
}
usepgfplotslibrary{patchplots}
usepackage{filecontents}

begin{filecontents*}{dfsa3c.dat}
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end{filecontents*}

begin{document}
centering
begin{tikzpicture} 
    begin{axis}[
xlabel=$x$,
ylabel=$y$,
% zlabel={$f(x,y) = xcdot y$},
title=isolines,
small,view={0}{90},colorbar,
xmin=0,
xmax=1,
ymin=0,
ymax=20,
]

           addplot3 [ patch type=bilinear,
           point meta=z, 
           point meta max = 1,
           point meta min =0,
           contour gnuplot={labels=false, 
           % levels = {0, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1}
           levels = {0, 0.1, 0.2, 0.3,  0.4, 0.5,  0.6, 0.7, 0.8, 0.9, 1}
           }]
            table {dfsa3c.dat};
end{axis}


    begin{axis}[
        xshift=8cm,
        small,view={0}{90},colorbar,
        title = requires Acroread,
        xlabel=$x$,
        ylabel=$y$,
        % colormap/jet,
]

           addplot3 [
           patch type=bilinear,
           %point meta= {tan(3*(z-1/2)*180/pi)},
           point meta max = 1,
           point meta min = 0,
           contour filled={labels=false, 
           % levels = {0, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1}
           levels = {0, 0.1, 0.2, 0.3,  0.4, 0.5,  0.6, 0.7, 0.8, 0.9, 1}
           }]
            table {dfsa3c.dat};
end{axis}
    %%%%%
     % begin{axis}[xshift=8cm,
%           xlabel=$x$,
%           ylabel=$y$,
%          title=DFSA,
%           small,view={0}{90},colorbar,
%            ]
%            addplot3 [surf,
%            shader=interp, contour gnuplot ={filled,labels=false}]
%             table {dfsa3c.dat};
%         end{axis}
end{tikzpicture}
end{document}

enter image description here

Besides, it is not possible to see the content of the figure on the right with a free previewer. I have to open the file with Acroread.
This problem is a limitation presented in the pgfplots manual pg.162.
Is there any way to overcome this limitation and to create the right-side contour plot with the isolines and observable with a non-Acrobat previewer?. Also, can the right figure have a colorbar like the left figure with smooth color transitions?


Get this bounty!!!

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