f5394eaa-5ccb-4cf7-9ee4-c057c35b8517 English ISO/IEC 8859-1 (also known as Latin 1) dataset dataset NERC EDS Environmental Information Data Centre Lancaster Environment Centre, Library Avenue, Bailrigg Lancaster LA1 4AP UK info@eidc.ac.uk https://eidc.ac.uk/ EIDC website The Environmental Information Data Centre (EIDC) is the UK's national data centre for terrestrial and freshwater sciences. information pointOfContact 2025-11-13T16:21:32 UK GEMINI 2.3 WGS 84 High-resolution (2 metre) digital elevation models of difference showing surface change following the Chamoli ice-debris flow, India, February 2021 2023-12-15 publication https://catalogue.ceh.ac.uk/id/f5394eaa-5ccb-4cf7-9ee4-c057c35b8517 10.5285/f5394eaa-5ccb-4cf7-9ee4-c057c35b8517 doi: Westoby, M. (2023). High-resolution (2 metre) digital elevation models of difference showing surface change following the Chamoli ice-debris flow, India, February 2021. NERC EDS Environmental Information Data Centre 10.5285/f5394eaa-5ccb-4cf7-9ee4-c057c35b8517 These data are digital elevation models (DEMs) of difference (DoD). They are a geospatial dataset created in raster (.tif) format and quantify vertical (z) topographic change between two dates. The data were created to support analysis of landscape change following the 7th February 2021 avalanche-debris flow in Chamoli District, Uttarakhand, India. The data also supported numerical modelling using CAESAR-Lisflood (see related data https://catalogue.ceh.ac.uk/documents/7023cb77-c797-475e-872c-6f1e2b63dcc1). They are most commonly imported into GIS software, where they can be analysed or support other forms of geospatial analysis. Full details about this dataset can be found at https://doi.org/10.5285/f5394eaa-5ccb-4cf7-9ee4-c057c35b8517 Westoby, M. Northumbria University matt.westoby@plymouth.ac.uk https://orcid.org/0000-0002-2070-5580 ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information author NERC EDS Environmental Information Data Centre info@eidc.ac.uk custodian NERC EDS Environmental Information Data Centre info@eidc.ac.uk publisher Westoby, M. Northumbria University matt.westoby@plymouth.ac.uk https://orcid.org/0000-0002-2070-5580 ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information pointOfContact Northumbria University EMAIL NOT PROVIDED owner remote sensing digital land model GEMET - Concepts, version 4.1.3 2019-01-28 creation Uttarākhand Chamoli GeoNames 2006-01-01 creation Himalaya Digital elevation model Change detection Topographic reconstruction otherRestrictions no limitations otherRestrictions This resource is available under the terms of the Open Government Licence otherRestrictions If you reuse this data, you should cite: Westoby, M. (2023). High-resolution (2 metre) digital elevation models of difference showing surface change following the Chamoli ice-debris flow, India, February 2021. NERC EDS Environmental Information Data Centre https://doi.org/10.5285/f5394eaa-5ccb-4cf7-9ee4-c057c35b8517 grid 2 English utf8 elevation 2021-02-01 2022-01-01 79.471 79.764 30.471 30.595 TIFF Shapefile NERC EDS Environmental Information Data Centre info@eidc.ac.uk distributor https://catalogue.ceh.ac.uk/datastore/eidchub/f5394eaa-5ccb-4cf7-9ee4-c057c35b8517 Download the data Download a copy of this data fileAccess https://data-package.ceh.ac.uk/sd/f5394eaa-5ccb-4cf7-9ee4-c057c35b8517.zip Supporting information Supporting information available to assist in re-use of this dataset information dataset dataset Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 The DEMs from which these DoDs were created are available in the related data collection. The DoDs were created in QGIS software (versions 3.18 and 3.24) using the Raster Calculator tool. For a given DEM pair, the later DEM was subtracted from the earlier DEM to create a DoD. In this way, minus values show surface lowering (e.g. erosion), and positive values show surface gain (e.g. deposition). Where holes/data gaps existed in the input DEMs, these are reproduced in the subsequent DoD. (These holes occur where photogrammetric reconstruction failed due to poor key-point or tie-point extraction due to cloud cover, topographic occlusion, or because of a large offset between the view angle of the two satellite image acquisitions, for example).