a = worldmap('World') %worldmap worldmap region or worldmap(region) sets up an empty map axes with projection and limits suitable to the part of the world specified in region. region can be a string or a cell array of strings. Permissible strings include names of continents, countries, and islands as well as'World', 'North Pole', 'South Pole', and 'Pacific'.

该命令yongyu用于设定一个空白的地图坐标，限定在一个区域上，该区域可以是一个string，或者cell array or strings。可接受的字符串包括大陆名称，国家，岛屿等。诸如南极，北极，taipingyang太平洋亦可。

load coast

plotm(lat, long)

land = shaperead('landareas', 'UseGeoCoords', true);

geoshow(a, land, 'FaceColor', [0.5 0.7 0.5])