Dear list,

I have multiple bird distribution maps in the form of ArcGIS shape files.
The distribution maps are composed of grid polygons. (1 grid= 100 km* 100km)

Now I want to obtain the centroids of each bird distribution maps.
In the first step, I use "Feature to point"  to retrieve centroid of each
grid within the polygons.
Then, please kindly advise if any method in R is available to get the
centroid of the grid centroid of each polygons.
Thank you in advance.

Elaine

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