[R] Excluding coordinates that fall within a circle

[Alice Domalik]

Hi List, 

I'm working with some bird tracking data, and to filter the data set, I need to exclude points taken at the colony. 
I would like to exclude coordinates from within a 500 meter radius of a point centered on the colony. 
However, as an R novice, I'm not sure how to accomplish this. 

My df looks like this: 

AnimalID Latitude Longitude Datetime 

Any suggestions would be greatly appreciated. 


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