Point cloud data and visualisation of an englacial cut-and-closure channel on Austre Broggerbreen, Svalbard, in March 2016

The dataset encompasses the processed point clouds (.pts format), a panoramic tour, and a video flythrough of registered point clouds capturing a 122 m long reach of an englacial cut-and-closure channel in the glacier, Austre Broggerbreen, Svalbard, in March 2016. Point clouds were derived from 28 Terrestrial Laser Scanning (TLS) surveys, to characterise the morphology of the channel in three-dimensions and enable extraction of features reflective of hydrological flow conditions. The panoramic tour shows a greyscale image of the scan reflectivity values at each survey location, whereby the lighter the pixel colour, the greater the intensity of the laser beam return. This panoramic tour enables the viewer to self-navigate through the channel to see the morphological features within it. The video flythrough of the point cloud provides a visualisation of the point cloud data, travelling from the glacier surface, down the moulin and along the extent of the scanned reach. The point cloud has been coloured to reflect differences in height.

Funding source

Knowledge Economy Skills Scholarship (KESS II) under Project AU10003, a pan-Wales higher-level skills initiative led by Bangor University of behalf of the HE sector in Wales. It is part funded by the Welsh Government''s European Social Fund (ESF) convergence programme for West Wales and the Valleys. Funding was awarded to TDLI-F and JEK, with support from Deri Jones & Associates Ltd. Additional support is acknowledged from Aberystwyth University (Department of Geography and Earth Sciences).

Alternate title: Polar Data Centre (PDC) record GB/NERC/BAS/PDC/01163

Date (Publication): 2020-01-29

Citation identifier: http://www.antarctica.ac.uk/dms/metadata.php?id= / GB/NERC/BAS/PDC/01163

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Antarctic Survey		pdc@bas.ac.uk	Custodian
UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation	Kamintzis, J., Jennings, S., Irvine-Fynn, T., Holt, T., Jones, J., Hubbard, B., & Bunting, P.	pdc@bas.ac.uk	Originator

Maintenance and update frequency: Unknown

Keywords

NDGO0001

NERC OAI Harvesting

NERC_DDC

GCMD Parameter Valids

EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Topography/Ice Sheet Topography
EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glaciers
EARTH SCIENCE > Hydrosphere > Glaciers/Ice Sheets > Glacier Topography/Ice Sheet Topography
EARTH SCIENCE > Hydrosphere > Glaciers/Ice Sheets > Glaciers

BAS Free-text keywords

Austre Broggerbreen
englacial
point clouds
terrestrial laser scanning

Use limitation: This data is supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.

Access constraints: Other restrictions

Other constraints: This data is supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.

Language: English

Topic category

Climatology, meteorology, atmosphere
Environment

Begin date: 2016-03-10

End date: 2016-03-16

Reference system identifier: OGP / urn:ogc:def:crs:EPSG::4326

Distribution format

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
Polar Data Centre - British Antarctic Survey		pdc@bas.ac.uk	Distributor

OnLine resource

Protocol	Linkage	Name
http		GET DATA

Hierarchy level: Dataset

Domain consistency

Measure identification: INSPIRE / Conformity_001

Conformance result

Title: INSPIRE Data Specification on unknown theme Guidelines

Date

Explanation: See the referenced specification

Pass: No

Statement: Each scan has been registered to the preceding scan with a mean registration accuracy of 3.3 mm. This error is the standard deviation of the orthogonal registration mismatch, expressed as cumulative distance offset in the X, Y and Z planes. Due to the unclosed traverse preventing equal error distribution between scans, the maximum combined absolute error at the end of the traverse is 73 mm, derived as the sum of orthogonal registration mismatches for the 28 scans.

Cleaning of the data used the ''distance based'' and ''stray'' filters within the FARO® SCENE 5 software to remove points > 30 m from each scan position and scan points that resulted from the laser beam hitting two objects.

Data losses are the result of the clean, shiny, smooth ice surfaces within the englacial channel, with these surfaces failing to provide laser returns due to the infrared absorption.