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Calculates the Cartesian cordinates (x,y,z) from lat long in radians
ll2cart(latr, longr)
latitude point in radians
longtitude point in radians
dataframe of x,y,z
Descartes, R., 1637. Discours de la methode. A Leyde, De l<U+2019>imprimerie de I. Maire, Paris.
# NOT RUN { lat <- runif (200,-24,-12) long <- runif (200,43,51) thepoints <- data.frame(lat,long) llrad <- deg2rad(thepoints) cartp <- ll2cart(llrad$lat,llrad$long) # }
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