Abstract

This study aims to analyze the determination of the development of service centers in the City of Pematang Siantar, compare the suitability of the spatial structure between the regional spatial planning with the results of the analysis and analyze the influence of the development of service centers on the regional development of the City of Pematang Siantar. The research method used is a quantitative descriptive method with the technique of Schalogram Analysis, Marshall Centrality Index, Spatial Analysis, Gravity Interaction and Structural Equation Model Partial Least Square (SEMPLS) method. The results of the study concluded that the Siantar Barat District with order I was designated as a City Service Center where the strongest regional interaction occurred with the Siantar Sitalasari District. The spatial structure stipulated in the 2012-2032 Regional Spatial Plan  for the City of Pematang Siantar is no longer in accordance with current conditions and the development of service centers has a positive effect on Regional Development of the city of Pematang Siantar.