convert_timestamps.rb

require 'csv'
require 'time'

CSV.open("costa_rica_int_timestamps.csv", "wb") do |csv|
  CSV.foreach("/path/to/costa_rica_geo.csv.txt") do |row|
    time = row[1]
    if time != "Timestamp"
      time = Time.parse(row[1]).to_i
    end
    csv << [row[0], time, row[2], row[3], row[4], row[5], row[6], row[7], row[8], row[9], row[10], row[11], row[12], row[13]]
  end
end