Abstract
Labuhanbatu Regency is a regency located in the North Sumatra province of Indonesia. This regency is crossed by a national road across Sumatra that connects provinces on the island of Sumatra. This has led to an increase in traffic accidents in this region. The number of accidents reached 114 accidents in the official police report for 2018. This study discusses locations that have a high frequency of accidents and represents them in the form of spatial data. The data used is based on the official report of the accident from Labuhanbatu Resort Police in 2018 which consists of 3 attributes namely, accident id, time of the accident, and location of the accident. The method used is to create a density map to calculate complexity in certain areas using Quantum GIS. This study uses the Kernel Density Estimation (KDE) method with a search bandwidth in an area of 300 meters. The results of the study are accident heat maps for the study area and related to the inputted attributes. The highest heatmap in the Bilah Hilir and Panai Tengah sub-districts with 25 attributes and 24 accidents included. The use of heatmap can produce spatial data that is easier to understand because it's clustering from the same area. In this study, clustering is done based on the time of occurrence to obtain a heat map in red to black for the density level based on the frequency of accidents.
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