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 collection). 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

Date (Publication): 2023-12-15

Citation identifier: https://catalogue.ceh.ac.uk/id/f5394eaa-5ccb-4cf7-9ee4-c057c35b8517

Citation 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

Point of contact

Organisation name	Individual name	Electronic mail address	Role
Northumbria University	Westoby, M.	matt.westoby@plymouth.ac.uk	Author
NERC EDS Environmental Information Data Centre		info@eidc.ac.uk	Custodian
NERC EDS Environmental Information Data Centre		info@eidc.ac.uk	Publisher
Northumbria University	Westoby, M.	matt.westoby@plymouth.ac.uk	Point of contact
Northumbria University		EMAIL NOT PROVIDED	Owner

Access constraints: Other restrictions

Other constraints: no limitations

Use constraints: Other restrictions

Other constraints: This resource is available under the terms of the Open Government Licence

Use constraints: 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

Distance: 2 urn:ogc:def:uom:EPSG::9001

Language: English

Character set: UTF8

Topic category

Elevation

Begin date: 2021-02-01

End date: 2022-01-01

Unique resource identifier: WGS 84

Distribution format

Name	Version
TIFF
Shapefile

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
NERC EDS Environmental Information Data Centre		info@eidc.ac.uk	Distributor

OnLine resource

Protocol	Linkage	Name
	https://catalogue.ceh.ac.uk/datastore/eidchub/f5394eaa-5ccb-4cf7-9ee4-c057c35b8517	Download the data

OnLine resource

Protocol	Linkage	Name
	https://data-package.ceh.ac.uk/sd/f5394eaa-5ccb-4cf7-9ee4-c057c35b8517.zip	Supporting information

Hierarchy level: Dataset

Other: dataset

Conformance result

Title: 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

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).

Metadata

File identifier: f5394eaa-5ccb-4cf7-9ee4-c057c35b8517 XML

Metadata language: English

Character set: 8859 Part 1

Hierarchy level: Dataset

Hierarchy level name: dataset

Date stamp: 2025-03-21T09:23:53

Metadata standard name: UK GEMINI

Metadata standard version: 2.3

Metadata author

Organisation name	Individual name	Electronic mail address	Role
NERC EDS Environmental Information Data Centre		info@eidc.ac.uk	Point of contact

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