Minecraft wiki entry for Explorer_Map, associated text: Item data
 tag:
 display: How the map looks in an item slot. See also Player.dat_format#Display Properties.
 Name: The name the map is given. In this case, they are localized strings: either {"translate":"filled_map.monument"},{"translate":"filled_map.mansion"} or {"translate":"filled_map.buried_treasure"}.
 MapColor: Color codes are calculated from the Red, Green and Blue components using this formula:
Red<<16 + Green<<8 + Blue.[note 1] Monument maps use 3830373, which is rgb(58,114,101). Mansion maps use 5393476, which is rgb(82,76,68). Buried treasure explorer maps do not use a color code.
 Decorations:
: One of these for each icon on the map. Explorer maps always have at least one representing their target.
 id: An arbitrary unique string identifying the decoration. For explorer map target structures, this is "+".
 rot: The rotation of the icon. For explorer map target structures, this is always 180.
 type: The ID of the map icon: 8 for a mansion map, 9 for a monument map, 26 for a treasure map.
 x: The world x-coordinate of the target structure icon.
 z: The world z-coordinate of the target structure icon.