Contour map to show ocean depth

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Jake 2020-4-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/520077-contour-map-to-show-ocean-depth

评论： Ke Wei Ong 2020-8-15

采纳的回答： darova

Sample.xlsx

Hello,

How can I construct a contour map as follows that shows the Ocean depths at a particular location, using Longitude, Latitude and Depth data. (Attached sample xlsx file)

I've been struggling to get something at least slightly similar and I have posted a few posts before this. I'm still learning MATLAB and this has been a dead end for me for some time now. So, literally ANY suggestion, recommendation or help is appreciated.

Now, Do I need more data? Or do I have to have a specific toolbox?

To clarify, I don't mind having different colors or a color bar than the one I have posted. My concern is getting the contour map generated as shown on the post.

Basically, the data refers to Lat, Lon and Depth/Altitude. I am interested in generatnig a contour map that shows different depths/altitudes based on that data set.

I'll add all my previous posts and reference here, to know what my intensions are.

https://www.mathworks.com/matlabcentral/answers/514760-create-contour-map-from-latitude-longitude-and-depth-from-csv-file

https://www.mathworks.com/matlabcentral/answers/519492-contour-plot-with-filled-colors-for-x-y-z-data

https://www.mathworks.com/matlabcentral/answers/519286-plot-bathymetry-data-on-google-earth-using-matlab

Thank you in advance!

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采纳的回答

darova 2020-4-23

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/520077-contour-map-to-show-ocean-depth#answer_427870

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Use griddata

% lat, long, depth - your data
[LAT,LON] = meshgrid(lat,long);         % create 2D matrices
DP = griddata(lat,long,depth,LAT,LON);  % calculate value at each grid point
contourf(LAT,LON,DP)