diff --git a/extracted-files/grammar.abnf b/extracted-files/grammar.abnf
index ad3a780..2ef6d78 100644
--- a/extracted-files/grammar.abnf
+++ b/extracted-files/grammar.abnf
@@ -155,7 +155,7 @@ upto8    = "0" / "1" / "2" / "3" / "4" / "5" / "6" / "7" / "8"
 
 ; ------------- Longitude -------------
 
-Longitude = ("N" / "S") upto180 [ "." 1*digit]
+Longitude = ("E" / "W") upto180 [ "." 1*digit]
 upto180  = "180" / "1" upto7 digit / [["0"] digit] digit
 upto7    = "0" / "1" / "2" / "3" / "4" / "5" / "6" / "7"
 
diff --git a/extracted-files/tags/type-Longitude b/extracted-files/tags/type-Longitude
index 6108950..e97b09d 100644
--- a/extracted-files/tags/type-Longitude
+++ b/extracted-files/tags/type-Longitude
@@ -18,7 +18,7 @@ specification:
     (the 180th meridian).
     
     ```abnf
-    Longitude = ("N" / "S") upto180 [ "." 1*digit]
+    Longitude = ("E" / "W") upto180 [ "." 1*digit]
     upto180  = "180" / "1" upto7 digit / [["0"] digit] digit
     upto7    = "0" / "1" / "2" / "3" / "4" / "5" / "6" / "7"
     ```