Matlab如何实现中国区域DEM地形图可视化

clc;clear;close allf_hgt = 'F:/Rpython/lp8/ETOPO2v2g_f4.nc';ncdisp(f_hgt);% time=ncread(f_hgt,'time');% level=ncread(f_hgt,'level');lon=ncread(f_hgt,'x');lat=ncread(f_hgt,'y');h=ncread(f_hgt,'z');% plot出图m_proj('Equidistant Cylindrical','long',[70 140],'lat',[15 55]);m_contourf(lon,lat,h',50,'linestyle','none');% m_coast('patch',[0.783,0.741,0.721]);%m_grid('box','fancy','tickdir','in');m_grid('linestyle','none','box','fancy','fontsize',11,'tickdir','in','xtick',[70:10:140],'ytick',[15:10:55]);c=colorbar('eastoutside','ticklength',0);caxis([-8000,8000])colormap(jet(100));% 调整colorbarax = gca;axpos = ax.Position;c.Position(3) = 0.5*c.Position(3);ax.Position = axpos;cbarrow;hold onma=shaperead('F:/RMeteoInfo/data/map/bou2_4l.shp'); m_line([ma(:).X],[ma(:).Y],'color','k');%绘制范围内的地图

m_maskmap('F:/RMatlab/lp1/data/bou2_4p.shp',true,'lon',lon2,'lat',lat2,'m_map',true);