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Accuracy of Cartosat-1 DEM and its derived attribute at multiple scale representation

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Abstract

Digital Elevation Model (DEM) provides basic information about terrain relief and is used for morphological characterisation, hydrological modelling and infrastructural studies. This paper investigates the accuracy of DEM and its derived attributes in multiple scales. This study was carried out for a part of Shiwalik Himalaya using Cartosat-1 stereo pair data. DEM at various cell sizes were generated and information content was compared using mean elevation, variance and entropy statistics. Various post-spacing DEMs were validated to understand variation in vertical accuracy along different scales. The vertical accuracy (3.14–7.24 m) is affected in larger spacing DEM and elevation is underestimated. Slope of terrain also has similar impacts. The DEM and slope accuracy are also affected by the terrain roughness while assessing coarser grid size.

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Acknowledgements

Authors are thankful to Indian Institute of Remote Sensing, Dehradun for providing the dataset for this study. Authors are also thankful to Dr P K Joshi for valuable comments to improve the manuscript.

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Correspondence to Sandip Mukherjee.

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Mukherjee, S., Mukherjee, S., Bhardwaj, A. et al. Accuracy of Cartosat-1 DEM and its derived attribute at multiple scale representation. J Earth Syst Sci 124, 487–495 (2015). https://doi.org/10.1007/s12040-015-0557-x

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  • DOI: https://doi.org/10.1007/s12040-015-0557-x

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