Urbanization unveiled: A correlation study between PSA level of urbanization and VIIRS nighttime lights
In this study, we employed the 2015 and 2020 annual composite Visible Infrared Imaging Radiometer Suite Day and Night Band (VIIRS-DNB) nighttime lights data and observed its first and second-order correlation with respect to the Philippine Statistics Authority (PSA) level of urbanization data, which is only released every five years. The analysis revealed a significant correlation between the intensity of nighttime lights and the level of urbanization at the regional and provincial levels. Hence, nighttime lights can be used as a good proxy measure for urbanization level that is available at finer spatial and monthly temporal scales. A timely and granular urbanization data can aid policymakers and urban planners expedite achieving Sustainable Development Goals (SDG) 11 which aims to mitigate the negative effects of unplanned and rapid urbanization, most particularly in developing countries such as the Philippines.