I would like to create a map from tiles. I guess this is how pokemon map was done. What I mean is let say an int table and each field has its own “number” which determines the tile used. Lets assume every tile has a size of 50x50px and has its anchor point in top left corner. If the cell is  and its value is 2 I would like the tile named for example 2.jpg be put on the map with coordinates  then if cell  has a value of 5 I would like the tile named 5.jpg to have coordinates  and so on and so on.
Is it reasonable way to do this? If yes how actually I should do this in unity?
EDIT: I found something like that:
What do you think about it?