[R] Merge data by coordinates

[Miluji Sb]

Dear all,

I have two dataframe 1 by latitude and longitude but they always do not
match. Is it possible to merge them (e.g. nearest distance)?

# Dataframe 1
structure(list(lat = c(54L, 55L, 51L, 54L, 53L, 50L, 47L, 51L,
49L, 54L), lon = c(14L, 8L, 15L, 7L, 6L, 5L, 13L, 5L, 13L, 11L
), PPP2000_40 = c(4606, 6575, 6593, 7431, 9393, 10773, 11716,
12226, 13544, 14526)), .Names = c("lat", "lon", "PPP2000_40"), row.names =
c(6764L,
8796L, 8901L, 9611L, 11649L, 12819L, 13763L, 14389L, 15641L,
16571L), class = "data.frame")

# Dataframe 2
structure(list(lat = c(47, 47, 47, 47, 47, 47, 48, 48, 48, 48
), lon = c(7, 8, 9, 10, 11, 12, 7, 8, 9, 10), GDP = c(19.09982,
13.31977, 14.95925, 6.8575635, 23.334565, 6.485748, 24.01197,
14.30393075, 21.33759675, 9.71803675)), .Names = c("lat", "lon",
"GDP"), row.names = c(NA, 10L), class = "data.frame")

Thank you so much!

Sincerely,

Milu

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