I'm not sure of any particular positions for a body to be placed in coffin. It is just best to make sure that the body is buried in the white garment called a "Shroud." I'm not sure of many laws regarding the creation of a Jewish graveyard, but According to Jewish law, a Jew should be buried among Jews. It is forbidden for a Jew to be buried in a mixed- denomination cemetery, or in a cemetery that allows the burial of questionably converted Jews. A proper Jewish grave is one in which the casket is laid directly in the ground, and covered with earth/dirt until it is full and a small mound is formed on top. The grave should be at least forty inches deep, and wide and long enough for the casket.
Above-ground burial, though, is strictly forbidden according to Jewish law, and Kabbalah adds that all alternative burial options interfere severely with the eternal rest of the soul. Then, of course, there is the tombstone. The tombstone is usually placed at the head of the grave, and the plot outlined with a low lying frame. The tombstone should be made from stone or granite and similar to those around it. It is customary to then engrave the Hebrew name of the deceased and his or her father's name, as well as the Hebrew date and year of passing on the tombstone. On all tombstones one adds the Hebrew letters תנצב''ה, which in acrostic form means "May his (her) soul be bound in the binding of life." Others write on the heading פ"נ , which means "Here is buried." Carving or engraving the form of a human being on the tombstone and mounting any pictures is forbidden. And also one should avoid writing the persons qualities and such. Hope this helps.