Lack of Tile Data From Tilemap Interaction

Godot Version

Godot4

Question

For some reason my artifact placement program has problems with garnering cell data even though the tilemaps z order is correct and the custom cell data name is correctly matched. Here is the code I appreciate any help I can get. Once again the problem is that no tile data is found no matter where I click.

extends Node2D

var groundlayer = 0
var can_place_custom_data = "can_place"
var tilepos = null
@onready var tilemap = $TileMap



func museum_get_input():
	if Input.is_action_just_pressed("build"):
		
		var mousepos = get_global_mouse_position()
		
		tilepos = tilemap.local_to_map(mousepos)
		
		var source_id = 0
		
		var Atlas : Vector2i = Vector2i(6, 1)
		
		var tileData : TileData = tilemap.get_cell_tile_data(groundlayer, tilepos)
		
		if tileData:
			var can_place_artifact = tileData.get_custom_data(can_place_custom_data)
			if can_place_artifact:
				global.remove_item("Artifact", "Figural Bowl")
				var artifact_sprite = Sprite2D.new()  # Create a new sprite node
				artifact_sprite.texture = "res://Art/Figural Bowl.png"
				artifact_sprite.position = tilepos  # Set the position of the sprite to the tile position
				get_node("Build").add_child(artifact_sprite)  # Add the sprite as a child to the scene
			else:
				print("can't place an artifact")
		else:
			print("no tile data")```