THE ROLE OF GEOLOGICAL RELATIONSHIP AND BRAND OF GEOPRODUCT ON REGIONAL DEVELOPMENT IN SAMOSIR ISLAND OF GEOPARK CALDERA TOBA WITH MEDIATING METHOD

Geoproducts have a specific philosophy, a geological relationship that visible and understandable through the utilization of geological and geomorphological features from diversity of geological, biological and cultural heritage then strengthened by geo-brand as added value of the product. As local products of certain region, geoproducts as an unique tourism product, through membership of Geopark Global Network (GGN), play role identifying the geopark itself and become market tools where geo-brands can take it. Samosir Island, as part of Toba Caldera Geopark, is the world's greatest Caldera with outstanding potential, became member of GGN in year of 2020. Data processing in this study used smartPLS SEM (Partial Least Square - Structural Equation Modeling) software.Various tourism products as geoproducts activity grow, whereas geoproducts are expected to follow the philosophy then becoming sector in development region of geopark, yet have no geo-brand. The geological relationships significantly impact the rise of tourism activities in the regional development of Toba Caldera. This is achieved by incorporating the products' geological, biological, and cultural factors. Usin g geological features must catch up to its potential as a world heritage site. Therefore, it is crucial to maintain these highly delicate elements through geotourism. A study was conducted on geoproduct actors from the supply side of tourism to see how the geological relationship is related to various products that can provide regional development in principle of sustainability a nd how geoproduct actors comprehend geo-brand on their products as an identity of worldwide product.