How to convert lon lat data extracted from Mapping Toolbox?

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Leon 2020-1-24

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https://ww2.mathworks.cn/matlabcentral/answers/501832-how-to-convert-lon-lat-data-extracted-from-mapping-toolbox

评论： Leon 2020-1-24

Here is my code trying to extract the longitude and latitude info out of mapping tool box so that I can make my own plots within app-deisigner (right now it does not support mapping toolbox):

load coastlines
axesm mercator
p = plotm(coastlat, coastlon);           
xlswrite('map.xlsx', [p.XData', p.YData']);

The issue is that the longitude and latitude values look very weird. Instead of having a range of -180 and 180 for longitude and -90 and 90 for latitude. They both range from -3 to 3.

Anyone knows how to convert them back to the regular longitude and latitude range?

Thanks!

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Geoff Hayes 2020-1-24

Leon - isn't the original data just the coastlat and coastlon variables? It could be that hte XData and YData correspond to the positions as drawn on your axes.

Leon 2020-1-24