Mr van Oyen said he had used satellite images to get his data saying they "are good enough to cover the whole country, although the quality and date of the data varies".
"I wanted to go to North Korea and because it was not yet mapped I decided to start mapping so I could at least see how easy it would be to travel within the country, " Sebastiaan van Oyen, who works as a risk manager for a financial trading firm in Sydney, told the BBC.