Spot heights of Signy Island (March 2015)

Spot heights of Signy Island, derived using stereoscopic photogrammetry from VHR (very high resolution) In-Track stereo satellite imagery collected during March 2015.

The spot heights were created to support the updated release of the British Antarctic Survey (BAS) Signy Island map (BAS, 2024) and represent a series of points containing x, y and z values of high points and peaks.

The dataset is available as a 3D point shapefile and a GeoPackage.

Alternate title: Polar Data Centre (PDC) record GB/NERC/BAS/PDC/01920

Date (Publication): 2024-10-29

Citation identifier: http://www.antarctica.ac.uk/dms/metadata.php?id= / GB/NERC/BAS/PDC/01920

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Antarctic Survey		pdc@bas.ac.uk	Custodian
NERC EDS UK Polar Data Centre	Fenney, N., & Gerrish, L.	pdc@bas.ac.uk	Originator

Maintenance and update frequency: Unknown

Keywords

NDGO0001

NERC OAI Harvesting

NERC_DDC

GCMD Parameter Valids

EARTH SCIENCE > Land Surface > Topography
EARTH SCIENCE > Land Surface > Topography > Terrain Elevation
EARTH SCIENCE > Land Surface > Topography > Topographical Relief

BAS Free-text keywords

Signy Island
South Orkney Islands
photogrammetry
spot heights

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

Access constraints: Other restrictions

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

Language: English

Topic category

Elevation
Geoscientific information

Begin date: 2015-03-29

End date: 2015-03-29

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: Image triangulation during the Socet GXP photogrammetric workflow was undertaken using a combination of ground control points and automatically generated tie points. The ground control points provided a global geospatial reference and were sourced from an earlier GNSS (global navigation satellite system) survey conducted around Signy Island during the 2001/02 Antarctic field season.

Identifying the original ground control points proved challenging due to the limited resolution of the satellite imagery and the duration of time that had passed between the original GNSS survey and the satellite capture. Points that could not be identified or no longer existed were removed.

The average error across the remaining ground control points following image triangulation was around 0.5 m.

Please refer to the original field report for an estimation of accuracy of the individual ground control points. BAS Archive reference no. AD6/2H/2001/L1 ''GPS Survey Field Report - 2001-02 Antarctic Field Season''.