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How to apply hatched region to a polar map

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HA
HA on 23 Jan 2019
Answered: Chad Greene on 15 Feb 2019
I have a polar contour map using the mapping toolbox (see code below) that I would like to add a hatched region to, in order to show significance.
load coastlines
axesm('stereo','Origin',[-90 0],'MapLatLimit',[-90 -30])
framem on;
gridm on;
setm(gca,'MLabelParallel',-20)
pcolorm(latmesh(1:48,:),lonmesh(1:48,:),DataZ')
shading interp;
geoshow(coastlat,coastlon)
axis off
set(gca,'xtick',[],'ytick',[])
title('Z','fontsize',14)
set(gca,'FontSize',12)
caxis([-15,15])
colormap redblue
I am able to get the desired hatched region on a normal contour plot (See below).
figure(2);
[C,h]=contourf(latmesh,Ymesh,DataZ)
set(h,'linecolor','none')
hold on
box on
title('Y','fontsize',14)
set(gca,'FontSize',12)
caxis([-6,6])
colormap redblue
xlabel('lat (°)')
figure(2);
[c1,h1]=contourf(latmesh,Ymesh,DataZsig,[2.5 2.5]-10);
set(h1,'linestyle','none','Tag','HatchingRegion');
ax1=gca;
hp=findobj(ax1,'Tag','HatchingRegion');
set(h1,'linestyle','none');
However, When I try to use this method with the polar contour map, it does not work.
Does anyone have any suggestions on how to make this work?
Thank you!

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Answers (2)

Chad Greene
Chad Greene on 15 Feb 2019
For anyone who wants to do this with Antarctic Mapping Tools, you may be able to use my stipple function. For a lat,lon grid and corresponding mask, just convert lat,lon to x,y and then use stipple like this:
[x,y] = ll2ps(lat,lon);
stipple(x,y,mask)

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Mark Brandon
Mark Brandon on 23 Jan 2019
Hi Holly,
What's your latmesh, longmesh and Ymesh?
Also you're plotting Antarctica. Do you use the Antarctic Mapping Tools toolbox?
Mark

  2 Comments

HA
HA on 24 Jan 2019
Hi Mark,
The mesh variables are grids of lat and lon, and for the one that works it is a lat and height grid. I think the problem is in the difference between contourf pcolourm.
Yes, I originall did the polar maps with the Antarctic Mapping toolbox, but found the method above to give me better plots. When I used the Antarctic Mapping toolbox I had simialr problems with plotting hatched markings (unable to call upon h1 as I am in the plot that works).
Holly
Mark Brandon
Mark Brandon on 1 Feb 2019
What a drag. Sorry not easy to solve.

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