file = File.open(File.expand_path("~/Desktop/output.kml"), "w")

file.write <<-EOL
<?xml version="1.0" encoding="UTF-8"?>
  <kml xmlns="http://www.opengis.net/kml/2.2">
    <Document>
EOL

CSV.foreach(File.expand_path('~/Desktop/***.csv'), col_sep: ";", headers: true) do |row| 
  file.write <<-EOL
      <Placemark>
        <name>#{row["Name"]}</name>
        <Point>
          <coordinates>#{row["Longitude"]},#{row["Latitude"]},0</coordinates>
        </Point>
      </Placemark>
EOL
end

file.write <<-EOL
  </Document>
</kml>
EOL

file.close