Even if the client select the additionnal infos it wants on the map, there may exist cases where this whole info is not given in one bunch but in separate bunches. This is done performance reasons (imagine some info related to a visible object and another info related to a 4 square width and height area). At the begin of an extended info packet is a bit field. A bit is activated for each extended information present in the data. More...

Even if the client select the additionnal infos it wants on the map, there may exist cases where this whole info is not given in one bunch but in separate bunches. This is done performance reasons (imagine some info related to a visible object and another info related to a 4 square width and height area). At the begin of an extended info packet is a bit field. A bit is activated for each extended information present in the data.