Urban planning in a city faces numerous challenges, particularly in contemporary times, where it must consider multiple domains to develop resilient cities capable of incorporating digital transformation into their growth strategies. Addressing sustainability needs, supported by the Sustainable Development Goals (SDGs), can contribute to achieving Goal 11 by integrating technologies to create increasingly smarter cities. This study aims to enhance our understanding of how the primary pillar, urban planning, relates to the secondary pillars of smart cities and digital transformation. The research reported here investigated preliminarily the components of urban planning, identifying potential gaps for exploration and future research endeavours. One of the key findings is the identification of elements comprising urban planning: Applied Technology, Urban Mobility, Generation/Consumption Energy, and Environment, with the latter subdivided into Air Quality, Climate Urban, Human Factors, Buildings Architecture, and Urbanism. This article may assist scholars and professionals in related fields in identifying relevant authors and their specifically research, potentially facilitating further advancements in urban planning for smart cities and various digital transformation strategies.