Get coordinates from colliding tile

I´m very new to Unity and want to make a 2D platformer like Mario with Tilemaps. But I can´t figure out how to manipulate a specific tile in a tile map. Like when the Player hits a Block that only the one Block disappears or just collect one Coin. I have separate tilemaps for these Blocks. So I want something like this...

Code (csharp):

1.  
2. void OnTriggerEnter2D(Collider2D col)
3.     {
4.         coin = col.gameObject;
5.         points += 1;
6.         coin.setActive(false);
7.         }
8.  

 

If you aren't doing any scaling and keeping 1 tile is 1 unity unit, just floor your localpos to get the tile index.

Code (CSharp):

1. Vector3Int local = Vector3Int.FloorToInt(transform.InverseTransformPoint(worldCoord));
2. Tilemap map = GetComponent<Tilemap>();
3. TileBase tile = map.GetTile(local);