diff --git a/work_files/DataFormats/Worldmap format.txt b/work_files/DataFormats/Worldmap format.txt
index c8a9ce1ed..ff70323af 100644
--- a/work_files/DataFormats/Worldmap format.txt	
+++ b/work_files/DataFormats/Worldmap format.txt	
@@ -43,11 +43,11 @@ Ord  Hex  Description
 # A payload is consisted as follows:
 #
 #   Literal        Description
-#   "\0pLd"        Payload header  [00, 70, 4C, 64]
+#   "\0pLd"       Payload header  [00, 70, 4C, 64]
 #   [4]            Identifier. 4 lettres ASCII string
 #   [6]            Uncompressed size of DEFLATEd binary (max size 256 TB)
+#   [6]            Length of the actual payload (max size 256 TB)
 #   [..]           DEFLATEd binary (begins with one of these: 0x789C, 0x78DA, 0x7801)
-#   "EndPYLd\xFF"  Payload footer  [45, 6E, 64, 50, 59, 4C, 64, FF]
 
 
 Payload "TERR" -- world terrain data in Uint16
@@ -92,7 +92,3 @@ EOF  4D   M
 EOF  FF   Byte order mark
 EOF  FE   Byte order mark
 
-
-* To read layers: you'll need to search for specific strings, namely ["TERR", "WALL", "WIRE"]
-* It is possible that compressed data happen to replicate any of the internal identifiers
-  (e.g. "\0pLdTERR", "EndTEM\xFF\xFE", "EndPYLd\xFF"), but such probability is very low (0.000000000000000005421 %)