Display USA Map With Defaultm

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Senrab 2011-7-29

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https://ww2.mathworks.cn/matlabcentral/answers/12642-display-usa-map-with-defaultm

编辑： Sushranth 2021-6-21

I have a Matlab program which I use to prepare points of geographic data. I do this by converting the points out of the Ellipsoid and onto the plane using the following.

mstruct=defaultm('lambert');
mstruct.origin=[45.684 -94.1505]; %TODO: What does this really do?
mstruct.mapparallels=[42.397 48.971];
mstruct=defaultm(mstruct);
mfwdtran(mstruct, ...

Since I have some questions about how well this process works I'd like to display the state of Minnesota's Lambert projection using the mstruct I've defined above.

I don't think I can do this with setm. Any thoughts?

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Answer 1

Sushranth 2021-6-21

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https://ww2.mathworks.cn/matlabcentral/answers/12642-display-usa-map-with-defaultm#answer_729595

编辑：Sushranth 2021-6-21

在 MATLAB Online 中打开

mfwdtran is outdated and will be removed in future releases. You can use projfwd instead.

mstruct=defaultm('lambert');
mstruct.origin=[45.684 -94.1505]; 
mstruct.mapparallels=[42.397 48.971];
mstruct=defaultm(mstruct);
[x y] = projfwd(mstruct, lat, long);
figure
plot(x,y)
axis equal