The article examines ecologically responsive and sustainable urban development through a case study of the Eastern Doon Area, Dehradun, India. The study integrates geospatial technologies and data analytics to assess land use, carrying capacity, and infrastructure in response to ecological challenges that arise due to rapid urbanisation. The literature review supports the planning framework, focusing on eco-synergy by balancing technology and ecology through green infrastructure and nature-based solutions. The study aimed to identify the carrying capacity of the study area and prepare a land use plan based on population density and sustainable land use models to ensure optimised urban growth. The study also highlights opportunities for mixed-use development along key transit corridors to enhance walkability and resilience. From the proposed plan, the challenges and various strategies for reducing ecological degradation were identified. Through nature-based solutions, such as bioswales and green ventilation corridors, the plan mitigates air and water pollution while improving environmental health. Strategies such as agroforestry practices, which integrate trees and shrubs into agricultural systems, promote ecological corridors and urban forests for biodiversity conservation and carbon sequestration. The proposed strategies align with smart city frameworks, which are urban development models that prioritise using technology and data to improve the quality of life for residents, by integrating geospatial insights for sustainable urban landscapes. This chapter provides practical recommendations for policymakers and urban planners, of ecologically responsive planning. The Eastern Doon case demonstrates how geospatial techniques can create resilient, sustainable urban environments that harmonise human development with ecological preservation.