calculation exposure of a point

Hello to all,

I have a dataset with georeferenced points and their altitudes.

Is it possible to get the exposure (North, South, East, West) of these points through a possible package?

Example of the dataset :

df <- data.frame(long = c(7.313608 , 7.28031156), 
                 lat = c(48.6 , 48.60276868), 
                 alt = c(709, 875.75))


What is the exposure of a point ?
It's something with a mathematical meaning?

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