function plotAscGridStruct(D)

pcolor(D.x,D.y,D.(D.varname));
clim(1) = min(min(D.val));
clim(2) = max(max(D.val));
shading interp;
axis    equal;
caxis  (clim)
%tickmap('xy')
xlim([D.xllcorner D.xllcorner+D.cellsize*D.ncols])
ylim([D.yllcorner D.yllcorner+D.cellsize*D.nrows])
colorbarwithtitle([D.filename,' [',D.units,']']);
