1 % 绘制地球仪，并标出我们的位置 2 cla reset; 3 load topo; 4  5 [x,y,z] = sphere(45);%45是画出来的球面的经纬分面数 6 s = surface(x,y,z,'FaceColor','texturemap','CData',topo); 7 colormap(topomap1); 8  9 % Brighten the colormap for better annotation visibility:10 brighten(.6)11 12 % Create and arrange the camera and lighting for better visibility:13 campos([1.3239  -14.4250  8.4954]);14 camlight;15 lighting gouraud;16 17 axis off vis3d; %axis off关闭所有的坐标轴标签、刻度、背景18 19 % Set the x- and y-coordinates of the textarrow object:20 x = [0.7698 0.5851];21 y = [0.3593 0.5492];22 % Create the textarrow object:23 txtar =  annotation('textarrow',x,y,'String','We are here.','FontSize',14,'Color',[.9,0,0]);24 25 % control of visual26 set(gcf,'Position',[100 50 600 500]) % [x_ori,y_ori,w,h], x_ori,y_ori以左下角为起点，向右为x,向上为y