ถิรกุลโตมร ติณณ์. The Creation of Contour Lines from Freeware. The 26th National Convention on Civil Engineering, [S. l.], v. 26, p. SGI-11, 2021. Disponível em: https://www.conference.thaince.org/index.php/ncce26/article/view/1150. Acesso em: 16 dec. 2025.