what is a traditional form of constructing a ground floor ?
Constructing is a big word it could mean foundation work for some, walls to another framing, masonry, finishes, decoration, painting, flooring, something that is learned over a lifetime or a paragraph in a textbook. The tradition could be Western, Eastern, Northern, Southern or any ethnic, geographical, or historical location or time on the globe. Even what is considered a ground floor is called the first floor in other parts of the world. So perhaps you could define your question a little more.