NERC Data Catalogue Service
Topographic contours of Signy Island (March 2015)
Topographic contours of Signy Island with 10 m intervals, derived from a digital elevation model originally created using stereoscopic photogrammetry from VHR (very high resolution) In-Track stereo satellite imagery collected during March 2015.
The topographic contours were created to support the updated release of the British Antarctic Survey (BAS) Signy Island map (BAS, 2024).
The dataset is available as a polyline shapefile and a GeoPackage.
WorldView-3 satellite images (c) 2015 Maxar Technologies.
Simple
- Alternate title
- Polar Data Centre (PDC) record GB/NERC/BAS/PDC/01919
- Date (Publication)
- 2024-10-29
- Identifier
- http://www.antarctica.ac.uk/dms/metadata.php?id= / GB/NERC/BAS/PDC/01919
- Maintenance and update frequency
- unknown Unknown
- Keywords
-
- NDGO0001
- NERC OAI Harvesting
-
- NERC_DDC
- GCMD Parameter Valids
-
- EARTH SCIENCE > Land Surface > Topography > Contours
- BAS Free-text keywords
-
- Signy Island
- South Orkney Islands
- photogrammetry
- topographic contours
- Use limitation
- Data supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.
- Access constraints
- otherRestrictions Other restrictions
- Other constraints
- Data supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.
- Metadata language
- EnglishEnglish
- Topic category
-
- Boundaries
- 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
-
- OnLine resource
- GET DATA ( http )
- Hierarchy level
- dataset Dataset
Domain consistency
- Measure identification
- INSPIRE / Conformity_001
Conformance result
- 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''.
Please note, the additional error created as a result of the terrain extraction and contour creation workflows will vary across the dataset and has not been formally calculated but is expected to be around 2 - 3 m.
- File identifier
- GB_NERC_BAS_PDC_01919 XML
- Metadata language
- EnglishEnglish
- Hierarchy level
- dataset Dataset
- Date stamp
- 2024-10-29
- Metadata standard name
- NERC profile of ISO19115:2003
- Metadata standard version
- 1.0
Overviews
Spatial extent
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