Dendeng, R.F.M. , Santa, K. and Kumajas, S.C. 2026. A WebGIS-Based Location Analysis System for Disaster Mitigation in Bitung City Using Ray Casting and Haversine Formula. Sinkron : jurnal dan penelitian teknik informatika. 10, 3 (Jul. 2026), 1630-1637. DOI:https://doi.org/10.33395/sinkron.v10i3.16164.