WEB BASED GEOGRAPHIC INFORMATION SYSTEM FOR OPTIMAL TOURIST ROUTE PLANNING IN NORTH SUMATRA USING THE ANT COLONY OPTIMIZATION ALGORITHM - Marpaung, Faridawaty; Mulyono, Mulyono; Fauzi, K M A; Yuniastuti, Eni; Arnita, Arnita; Panggabean, Suvriadi (BAREKENG: Jurnal Ilmu Matematika dan Terapan, 2026)