www.gusucode.com > map 案例源码 matlab代码程序 > map/ViewDistortionConicProjWithProperlyChosenParallelsExample.m

    %% View Distortion of Conic Projection with Properly Chosen Parallels
% 
%%
% An equidistant conic projection with properly chosen parallels can map
% the conterminous United States with less than 1.5% distortion.
figure
usamap conus
load conus
patchm(uslat, uslon, [1 0.7 0])
plotm(statelat, statelon)
patchm(gtlakelat, gtlakelon, 'cyan')
framem off; gridm off; mlabel off; plabel off
mdistort('parscale', -2:.5:2)
parallelui