Purnomo, Yudi, and Agustiah Wulandari. “A Geoprocessing Approach Using Poi Visibility Index for Identifying Potential Routes in Designing Sustainable Tourism Development: The Case Study of Singkawang, Indonesia”. JURNAL GEOGRAFI 17, no. 2 (August 14, 2025): 223–234. Accessed October 22, 2025. https://jurnal.unimed.ac.id/2012/index.php/geo/article/view/64723.