Baseline Record of Vegetation Dynamics at Cape Hallett, Antarctica, 1961-2018
Plot data Mc Nemar: To enable comparisons with the 1961 and 2004 survey results, the Lambert Conformal Conic projection from the 2004 survey was used to precisely georeference and trim the RGB image across a 1-m2 grid, generating a total of 3,458 1-m2 grid cells. For each grid cell moss, lichen, or algae/cyanobacteria cover was extracted as one of the four cover classes: Heavy (>40%), Patchy (10–40%), Scattered (less than 10%), and None (0%) for the survey years 1962, 2004 and 2018.
Ground truthing: To test the overall accuracy of cover classifications and ensure consistency with 2004 survey methodologies, a ground-truthing approach was performed. Photographs were taken of individual cells along eight transects, running west to east across the plot at 0.5, 1.5, 15.5, 16.5, 28.5, 29.5, 116.5 and 117.5 m distance from the NW corner. Each grid cell could be identified individually with an x/y coordinate in the centre and was surrounded by a rectangular frame parallel to the outer edge of the plot. A total of 174 photographs were taken and archived with Antarctica New Zealand. For each photographed grid cell, the presence of each functional group of vegetation and their cover class was assessed visually.
Orthomosaic image: Aerial images were obtained using a DJI Matrice 600 Pro hex-rotor remotely piloted aircraft system equipped with a Canon EOS 5Ds camera (image size: 8688×5792 pixels, focal length: 50 mm, pixel size: 4.14 μm) on November 28, 2018. The flight altitude was 30 m above ground level, and a total of 10 ground-control points were included to provide accurate geo-referencing. An orthomosaic photo and accompanying DEM was generated with the acquired aerial images using Agisoft PhotoScan (now known as Metashape by Agisoft LLC, https://www.agisoft.com/)
RELATED PUBLICATION: https://doi.org/10.1029/2022EF002823
GET DATA: https://doi.org/10.7488/ds/3417
Simple
Identification info
- Date (Creation)
- 2022-03-14T00:00:00
- Date (Publication)
- 2022-03-14T00:00:00
- Citation identifier
- https://doi.org/10.7488/ds/3417
- Presentation form
- Status
- Completed
- Point of contact - Custodian, Owner, etc
-
Role Organisation Individual Electronic mail address Publisher University of Edinburgh. School of GeoSciences Author Pan, Yueming Co-author Gemal, Emma Co-author Brabyn, Lars Co-author Kim, Jeong-Hoon Co-author Green, Allan Thomas George Co-author Cary, Steven Craig Co-author Lee, Charles Kai-Wu Co-author Colesie, Claudia
- Spatial representation type
- Topic category
-
- Biota
- Environment
Extent
Temporal extent
- Time period
- 1961-11-01 2018-11-01
- Keywords
-
- CAPE HALLETT
- GCMD Earth Science and Earth Science Services Keywords
-
- VEGETATION COVER
- CYANOBACTERIA (BLUE-GREEN ALGAE)
- MOSSES/HORNWORTS/LIVERWORTS
- LICHENS
- GCMD Platform/Sources Keywords
-
- AERIAL PHOTOGRAPHS
- DEM
- GCMD Instrument Keywords
-
- CAMERA
- GCMD Locations Keywords
-
- ANTARCTICA
- ROSS SEA
- Resource constraints
-
Legal constraints Access constraints Use constraints Constraint application scope This data set conforms to the CC BY Attribution License (https://creativecommons.org/licenses/by/4.0/) License License Dataset
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distribution format
-
- Reference System Information
-
Reference system type Code Description Temporal xxxx.xx (decimal year) Coordinate epoch
- Metadata constraints
-
Legal constraints Access constraints Use constraints Constraint application scope This data set conforms to the CC BY Attribution License (https://creativecommons.org/licenses/by/4.0/) License License Metadata
Metadata
- Metadata identifier
- urn:uuid/73e903ee-1052-4d25-b1a0-d23e9b75e4ec
- Language
- English
- Character encoding
- anyValidURI
- Metadata Contact
-
Role Organisation Individual Electronic mail address Point of contact Colesie, Claudia claudia.colesie@ed.ac.uk
Type of resource
- Resource scope
- Dataset
- Metadata linkage
-
Name Linkage (URL) Protocol Function Description https://doi.org/10.7488/ds/3417 Complete Metadata
- Date info (Revision)
- 2024-02-20T03:05:13
- Date info (Creation)
- 2024-02-20T01:24:56
Metadata standard
- Format name
- ISO 19115-1
- Edition
- 2018