Different ground types

Is it possible to "tag" tiles in the same tilemap to be recognized as types of ground for my footstep sounds, I know i could have a tilemap for each different surface types but I'd like to keep it simple in a single tileset, it would be nice to be able to tag each tiles in the Tile Palette and be able to access that tag, is there another way to do this?

 

I created a custom tile with some public variables but I don't understand how to access them, GetTile returns WoodTile but I'm unable to access it's variables, some help would be appreciated.

Code (CSharp):

1. Tilemap tileMap = collider.GetComponent<Tilemap>();
2. TileBase currentTile = tileMap.GetTile(tileMap.WorldToCell(collisionPos));
3. print(currentTile);

 

Had to do it like this instead:

Code (CSharp):

1. Tilemap tileMap = collider.GetComponent<Tilemap>();
2. GroundTile currentTile = tileMap.GetTile(tileMap.WorldToCell(collisionPos)) as GroundTile;
3.  
4. if (currentTile is GroundTile)
5. {
6.     print(currentTile.groundType);
7. }