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How to find the nearby sampling stations

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Leon
Leon le 11 Avr 2021
Commenté : dpb le 16 Avr 2021
I have millions of samping sations, my goal is to find the nearby stations with a certain distance threshold. What is the best way to do it based on the longitude and latitude information?
It seems that calculating the stations between each of them is extremely time-consuming.
Thanks.
  6 commentaires
Leon
Leon le 12 Avr 2021
Many thank for the recommendations.
It would be great if Mathworks could develop a function to allow me to easily find nearby sations with a specific radius (considering the land mask as well).
dpb
dpb le 12 Avr 2021
I would presume there are tools in the Mapping Toolbox (which I don't have) similar to pdist2 in base product, but I really don't know much at all about what is available.

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Shadaab Siddiqie
Shadaab Siddiqie le 16 Avr 2021
From my understanding you want to speed up the process of finding the nearest location. You can use pdist2 to find pair-wise distance of all the point in a range or you can also use dsearchn to find nearest point.
  1 commentaire
dpb
dpb le 16 Avr 2021
Neither of which address that OP's coordinates are in lat, long, not x,y,z...

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