Dugi otok, characterized by its typical karst landscape, faces the problem of depopulation and the development pressures of tourism, one of the main drivers of economic development, on the landscape. Therefore, it is assumed that the values of the landscape are not fully recognized and that the naturalness of the landscape is endangered by the implementation and planning of projects that do not respect its peculiarities. The aim of the work is to identify very valuable areas of the island's landscape and create guidelines for the development of the area and the project program. By analyzing spatial factors through spatial data and literature, cartographic representations are created in the QGIS program. After the analysis, landscape quality modeling is carried out using the ProVal 2000 program, where the analyzed spatial factors are classified into three groups - natural-ecological, social-cultural and visual-experiential. The obtained combined quality model shows the most valuable and most vulnerable areas of Dugi otok. The directions and visions of the island's development are determined through the analysis of strategic documents. The directions of development of Dugi otok aim at improving the infrastructure, social activities, living standards and tourism offers. In conclusion, the development guidelines are proposed, with regard to the vision of the development of the island and the modeled areas of the highest quality, which unify the already proposed measures and clearly determine the mechanism of implementation and handling of interventions in the landscape.