NERC Data Catalogue Service
High-resolution (2 metre) digital elevation models of difference showing surface change following the Chamoli ice-debris flow, India, February 2021
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
Simple
- Date (Publication)
- 2023-12-15
- Identifier
- doi: / 10.5285/f5394eaa-5ccb-4cf7-9ee4-c057c35b8517
- Other citation details
- 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
- Access constraints
- otherRestrictions Other restrictions
- Other constraints
- no limitations
- Use constraints
- otherRestrictions Other restrictions
- Use constraints
- otherRestrictions Other restrictions
- Other constraints
- 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
- Spatial representation type
- grid Grid
- Distance
- 2 urn:ogc:def:uom:EPSG::9001
- Metadata language
- EnglishEnglish
- Character set
- utf8 UTF8
- Topic category
-
- Elevation
- Begin date
- 2021-02-01
- End date
- 2022-01-01
N
S
E
W
))
- Unique resource identifier
- WGS 84
- Distribution format
-
-
TIFF
()
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Shapefile
()
-
TIFF
()
- OnLine resource
-
Download the data
Download a copy of this data
- OnLine resource
-
Supporting information
Supporting information available to assist in re-use of this dataset
- Hierarchy level
- dataset Dataset
- Other
- dataset
Conformance result
- Date (Publication)
- 2010-12-08
- Statement
- 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).
- File identifier
- f5394eaa-5ccb-4cf7-9ee4-c057c35b8517 XML
- Metadata language
- EnglishEnglish
- Character set
- ISO/IEC 8859-1 (also known as Latin 1) 8859 Part 1
- Hierarchy level
- dataset Dataset
- Hierarchy level name
- dataset
- Date stamp
- 2025-11-13T16:21:32
- Metadata standard name
- UK GEMINI
- Metadata standard version
- 2.3
Point of contact
NERC EDS Environmental Information Data Centre
Lancaster Environment Centre, Library Avenue, Bailrigg
,
Lancaster
,
LA1 4AP
,
UK
https://eidc.ac.uk/
Overviews
Spatial extent
N
S
E
W
Provided by
Associated resources
Not available