Htykuut

I want to plot lat/lon contours at the south pole, my data consists of grid cells, each with a lat and lon value. My problem is where the longitudes "meets" each other, as you can see in the picture, the vertical longitude in the lower part of the picture have a lot of lines on top of each other.
Does anyone know how to remove them? Here is my code:

coldiv = -57.5:2.5:-7.5; 

min_pr = coldiv(1); max_pr = coldiv(end);

cmap = [0 0 0.4; 0 0 0.7; 0 0 1; 0 0.2 1; 0 0.4 1; 0 0.6 1; 0 0.8 1; 0 1 1;         

0 1 0; 0.6 0.8 0; 0.6 0.6 0; 0.6 0.4 0; 0.6 0.2 0; 1 0 0];





x = linspace(1,length(coldiv)-2,length(cmap));

xi = 1:length(coldiv)-2;

cmap = interp1(x,cmap,xi);

cmap = [0. 0. 0.; cmap];

fig=figure();

set(fig, 'Position', [10 10 1500 700])





pcolor(mean(tas_ann_DMI_hist_tot,3))

shading flat

hold on;

contour(flip_lat_DMI, 'k','ShowText','on');

contour(flip_lon_DMI, 'k','ShowText','on');

caxis([min_pr max_pr]);colormap(cmap);

axesHandles = findobj(get(fig,'Children'), 'flat','Type','axes');

axis(axesHandles,'square')

set(gca,'YTick',);

set(gca,'XTick',);

I found a solution.

flip_lon_DMI(flip_lon_DMI<-160) = NaN;

flip_lon_DMI(flip_lon_DMI>190) = NaN;



...



contour(flip_lat_DMI,-90:5:-60,'k--','ShowText','on','Color',[.5 .5 .5]);

contour(flip_lon_DMI,-150:30:180,'k--','ShowText','on','Color',[.5 .5 .5]);