The GMCP.Overland package
This package is supported in Lumen et Umbras Mudlet package
gmcp.overland.map
Sent by the server to update a colored ASCII map in the client. Only the rows that changed are sent.
gmcp.overland.map {
    "r1" : "\033[38;2;0;0;0m     \033[38;2;111;94;84m...",
    "r2" : "..."
    ..
    "r11": "...",
    "size": 12
}
- r1 to r?? (Mandatory) Encoded ANSI control sequences and character data
- size (Mandatory) Number of rows of the full map A control sequences indicator is encoded as "\033[". So "\033[38;2;111;94;84m" is the CSI sequence to set the foreground color as RGB value 111,94,84
Representation in dedicated client frame
