The following is a list showing possible treasure map grotto locations in Dragon Quest IX. For the over 10,000 treasure maps, there are 150 locations on the world map for a grotto to be, a grotto location is somewhat limited by the map type but randomly chosen from possible locations. These are just a few possibilities.
For more information regarding treasure maps, see Treasure map (Dragon Quest IX).
For Chinese source with the 150 (numbered in Hex) available, see the following location 
For the formula on how to calculate which map you'll get, visit