Determination of Optimal Road Alignment Using GIS Least Cost Path Analysis: A Case Study of Situm - Gagidu Station, Morobe Province-PNG. mjgps [Internet]. 2018 Jul. 28 [cited 2026 Aug. 13];4(1). Available from: https://pnguotjournals.unitech.ac.pg/index.php/mjgps/article/view/186