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    Comparison and Validation of Satellite-Derived Digital Surface/Elevation Models over India

    82611.pdf (2.211Mb)
    Access Status
    Open access
    Authors
    Goyal, Ropesh
    Featherstone, Will
    Dikshit, O.
    Balasubramania, N.
    Date
    2020
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Goyal, R. and Featherstone, W.E. and Dikshit, O. and Balasubramania, N. 2020. Comparison and Validation of Satellite-Derived Digital Surface/Elevation Models over India. Journal of the Indian Society of Remote Sensing.
    Source Title
    Journal of the Indian Society of Remote Sensing
    DOI
    10.1007/s12524-020-01273-7
    ISSN
    0255-660X
    Faculty
    Faculty of Science and Engineering
    School
    School of Earth and Planetary Sciences (EPS)
    Remarks

    This is a post-peer-review, pre-copyedit version of an article published in Journal of the Indian Society of Remote Sensing. The final authenticated version is available online at: http://doi.org/10.1007/s12524-020-01273-7.

    URI
    http://hdl.handle.net/20.500.11937/82549
    Collection
    • Curtin Research Publications
    Abstract

    © 2020, Indian Society of Remote Sensing. India presents among the world’s most topographically complex geomorphologies, with land elevations ranging from –2 m to + 8586 m and terrain gradients sometimes exceeding 45°. Here, we present an evaluation of four freely available digital surface models (DSMs) on a model-to-model basis, as well as a validation using independent ground-truth data from levelled benchmarks in India. The DSMs tested comprise SRTM1″, SRTM3″, ASTER1″ and Cartodem1″ [an India-only model]. Along with these four DSMs, the MERIT3″ digital elevation model (DEM) is also tested with the ground-truth data. Our results for India indicate some mismatch of these DEMs/DSMs from their claimed accuracies/precisions. All DSMs/DEMs (except for ASTER) have > 90% of pixels satisfying ± 16 m at the one-sigma level, but only in the low-lying (< 500 m) parts of India, i.e. the Gangetic plains and the Thar desert.

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