www.gusucode.com > map 案例源码 matlab代码程序 > map/GenerateBufferInternalToPolygonExample.m
%% Generate Buffer Internal to Polygon % This example shows how to use the <docid:map_ref.f12-569586> function to % generate a buffer zone internal to a land area polygon. For more % information about this topic, see <docid:map_ug.f7-6413>. %% % Import Madagascar polygon shape. % Copyright 2015 The MathWorks, Inc. madagascar = shaperead('landareas','UseGeoCoords',true, ... 'Selector', {@(name)strcmpi(name,'Madagascar'),'Name'}); %% % Create a map showing Madagascar. figure worldmap('madagascar') geoshow(madagascar) %% % Use |bufferm| to create a buffer zone that extends 0.75 degrees inland % from the coast of Madagascar. madlat = madagascar.Lat; madlon = madagascar.Lon; bufwidth = 0.75; direction = 'in'; [latbuf,lonbuf] = bufferm(madlat,madlon,bufwidth,direction); %% % Show the buffer zone in green. geoshow(latbuf,lonbuf,'DisplayType','polygon','FaceColor','green')