If you're talking about minimaps, these two maybe your solutions:
http://forums.rpgmakerweb.com/index.php?/topic/13801-napoleons-minimap/?hl=minimap
http://forums.rpgmakerweb.com/index.php?/topic/1935-kms-minimap/?hl=minimap
If you're talking about the position of the current map in the whole world, you can do it via events after you've a picture of the whole world and another picture which is a dot:
1. Create a variable storing the current map id. I call the variable "Map ID" here.
2. Create a common event showing the whole world picture at either corner and the dot picture at the current part of the whole world by using "Map ID" to adjust its position relative to the whole world picture.
(You've to map each map id to the corresponding position of the whole world picture yourself)
3. Create events in every map that triggers once whenever players enter that map. They set "Map ID" as the current map id.
(Or you can just use script as "Operand" of "Control Variables" to set "Map ID" as $game_map.map_id without creating those events in every map)
It's just a vague idea, but maybe this will work for you
