Application of Google Earth Engine for Green Space Classification and Green Space Per Capita Ratio Analysis at the Sub-district Level, Mueang Phitsanulok District

Abstract

This research aimed to evaluate the green space per capita status at the sub-district level of Mueang Phitsanulok District for the year 2024, utilizing Sentinel-2 satellite imagery and Google Earth Engine technology for green space classification. The analysis of green space and population data revealed a distinct variation in the green space per capita ratio across sub-districts, ranging from 99.95 sq.m/person in Phitsanulok City Municipality to 7,229.71 sq.m/person in Don Thong Subdistrict. The results, processed through Google Earth Engine, were presented as a thematic map categorizing the green space per capita ratio into three levels: low (<2,495.28 sq.m/person), medium (2,495.28-4,890.24 sq.m/person), and high (>4,890.24 sq.m/person). This highlights a clear disparity in green space accessibility, particularly in urban areas which have low ratios when compared to surrounding rural areas. Therefore, these findings provide essential data to support strategic planning, leading to sustainable development and improved urban livability