In the realm of urban planning and infrastructure development, the fusion of expansive data and cutting-edge analytics has ushered in an era where cities can craft their trajectories based on evidence and foresight. This data-driven approach empowers municipalities to optimize resource allocation, enhance operational efficiency, and ultimately elevate the quality of services provided to residents. However, the pursuit of data accuracy, a linchpin in this paradigm, is not without its hurdles, including the challenges of cost, time constraints, and varying data availability. Despite these obstacles, the significance of accurate data cannot be overstated. It serves as the cornerstone for informed decision-making, enabling city governments to pinpoint and rectify disparities, channel resources with precision, and curtail inefficiencies. This paper under-takes a comprehensive examination of the cost-effectiveness of data accuracy within the framework of city development strategy, employing a meticulous cost-benefit analysis. By delineating the nuanced relationship between accuracy and cost, the research aims to identify the optimal threshold for data accuracy. Armed with this knowledge, city governments can make judicious choices, harnessing the transformative potential of accurate data to sculpt more equitable, sustainable, and livable urban landscapes. The findings of this study promise to guide cities toward a future where precision in data informs policy, fostering cities that are not only resilient but responsive to the diverse needs of their inhabitants.