How to add hatching on a grid map?

It's easy to add points on a map using code below, but how to add hatching (see figure below)? Thanks.

   [lat,lon]=findm(pvalue<0.05,R); % select lon and lon interested
   hs=geoshow(lat,lon,'DisplayType','point','markeredgecolor',[1 1 1]); % add points
   set(hs,'marker','.','markersize',6); %set point property

Answer 1

[Jiangpeng Cui]

Does anybody have an idea? Thanks.