A Methodology for Checking the Validity of an Existing Contour Map Using RTK-GPS and GIS. University of Khartoum Engineering Journal, [S. l.], v. 7, n. 1, 2022. DOI: 10.53332/kuej.v7i1.989. Disponível em: https://onlinejournals.uofk.edu/kuej/article/view/989. Acesso em: 8 يوليو. 2026.