How to plot wind vectors with quivers on a latitude/logitude plot

Question

giacomo labbri 2021-1-16

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/718845-how-to-plot-wind-vectors-with-quivers-on-a-latitude-logitude-plot

编辑： Adam Danz 2021-1-20

Hi,

I am plotting some wind data and I would like to have the that shows the direction and speed of the wind at the location were they were taken (given by latitude and longitude).

Minimal working example:

lat=[10,11,13];
lon=[-59,-58,-55];
h1=[100,100,100];
h2=[200,200,200];
u_h1=[-2,-3,-5];
u_h2=[-3,-5,-7];
v_h1=[2,1,-1];
v_h2=[2,3,-2];
w_h1=[0,0,0];
w_h2=[0,0,0];
figure
quiver3(lon,lat,h1,u_h1,v_h1,w_h1)
hold on
quiver3(lon,lat,h2,u_h1,v_h1,w_h2)

Does quiver already produce reliable length and arrow direction even if the underling grid in lat and lon. It seems so from the example but i am perplexed how does it work.

If it does not work with lat and lon as x and y how can I substitute them ratining the information about the location?

Thanks in advance

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Answer 1

Adam Danz 2021-1-17

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https://ww2.mathworks.cn/matlabcentral/answers/718845-how-to-plot-wind-vectors-with-quivers-on-a-latitude-logitude-plot#answer_599865

编辑：Adam Danz 2021-1-18

There are various types of map functions and it's not clear which one you're using. Here's a demo showing a quiver plot on a map.

https://www.mathworks.com/matlabcentral/answers/628408-topography-in-a-pcolor-graph#answer_526288

About the arrow lengths, see the scale input:

quiver3(___,scale)

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giacomo labbri 2021-1-18

Thanks for your asnwer!

I am not using any map function (unless quiver uses one by default). I am just feeding to quiver vectors that contains values of longitude and latitude as X and Y. The essence of what I am doing is in the MWE. My question is does this apprach produce reliable wind direction and lenght?

Adam Danz 2021-1-18

编辑：Adam Danz 2021-1-20

> does this apprach produce reliable wind direction and length?

Yes. By default the length of the vectors are scaled to reduce overlap. If you want the vector length to equal the magnitude of the wind velocity, set the scale to 0 as suggested in my answer.

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