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Evaluation of Cartosat-2E Data for Large-Scale Urban Mapping

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Abstract

Large-scale maps are a prerequisite for sustainable management of urban areas for which very high-resolution satellite (VHRS) imagery can be effectively utilized. PAN sharpened (merged) orthorectified product of Cartosat–2E satellite launched by ISRO (0.6 m spatial resolution) has been evaluated for 1:4000 scale mapping in Dehradun and Rishikesh, India. Root mean square error (RMSE) of Cartosat-2E data is found to be 29.03 m in Dehradun and 28.15 m in  Rishikesh. However, after the induction of GCPs collected from the Differential GPS (DGPS) survey, RMSE error reduced to less than 1 m, which is acceptable for urban mapping as per atal mission for rejuvenation and urban transformation (AMRUT) design and standards. It is observed that system-level improvements in data acquisition and the use of high accuracy GCPs can assist in harnessing the potential of Cartosat-2E for large-scale urban mapping at 1:4000 scale. It is also found that Cartosat 2E data can be utilized for identification of a large number of subclasses (~ 39) of urban land use land cover and building footprints as per the AMRUT design standards which have a great potential to reduce project cost and volume of human resources for large-scale urban mapping as compared to conventional ground-based methods.

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Acknowledgements

Authors are grateful to Dr. Prakash Chauhan, Director, Indian Institute of Remote Sensing, Dehradun (a unit of Indian Space Research Organization), for technical guidance and logistics support. They are also grateful to National Remote Sensing Centre, Hyderabad, for providing Cartosat-2E data. Authors wish to thank reviewers for their valuable time and critical suggestions for improvement in manuscript.

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Correspondence to Kshama Gupta.

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Sandhu, S., Gupta, K., Khatriker, S. et al. Evaluation of Cartosat-2E Data for Large-Scale Urban Mapping. J Indian Soc Remote Sens 49, 1593–1602 (2021). https://doi.org/10.1007/s12524-021-01337-2

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  • DOI: https://doi.org/10.1007/s12524-021-01337-2

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