How to remove placed unused tiles?

[Titanium X]

I've accidentally placed some unused tiles while doing some world building. The tiles can't be removed through traditional methods, and they have no properties.

How can they be removed?

 

[Talow]

did they get frozen to the map? do you have the item id?

 

[m309]

If you have the ItemID you can remove them via Fiddler or CED if they're static items. If they're just random junk spawned on the map, you can search and destroy them with Ig commands or XmlFind.