Spatial Evaluation of Urban Green Space-Population Relationship Using Sentinel-2 Satellite Data and Object-Based Image Analysis: A Case Study Antalya

The relationship between urban green space (UGS) and population is essential for the quality of life in cities. In this study, a method is proposed to determine the relationship between UGS and population in Antalya, Türkiye, and to reveal the change in the short-term, using Sentinel-2 satellite data and object-based image analysis (OBIA). In the study, two different dated Sentinel-2 satellite data were used as the basic data set to analyze the vegetation. The Normalized Difference Vegetation Index (NDVI) was calculated for the threshold value and UGSs were analyzed according to different categories. Then, the Urban Green Space Index (UGSI) was calculated to determine the amount of green space and Per Capita Green Space (PCGS) was also calculated for this purpose. The OBIA general accuracy values of the proposed method are 93% and 94% for 2017 and 2023, respectively. The results showed that PCGS across the study area decreased by 7.33 m² in a short time. It is evaluated that the method proposed in this study, which reveals the short-term change in UGS and PCGS more quickly and at lower cost, can be used effectively in sustainable city management.