Population synthesis is a research area within the field of demographic modeling and urban planning that focuses on creating synthetic populations to simulate the characteristics and behaviors of individuals in a given geographic area. This involves generating a representative sample of individuals that accurately reflects the demographic, social, and economic characteristics of the population being studied, such as age, gender, income, household size, and employment status. Population synthesis is often used in transportation planning, public health research, and urban development to predict how changes in infrastructure, policies, or social factors may impact the behaviors and needs of a population. By creating realistic synthetic populations, researchers can conduct simulations and analyze potential scenarios to inform decision-making and policy development.