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Macquarie Island Vegetation and Drainage Structure Data Set

Entry ID: MIvegmap

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Summary

Abstract: The data for this map were collected as part of two ASAC projects - 488 and 956, of which Patricia Selkirk was the chief investigator. Macquarie Island (54 degrees S 159 degrees E) is a subantarctic island (c. 35km by 3 to 5km) approximately equidistant between Tasmania, New Zealand and Antarctica in the Southern Ocean. The vegetation is herbaceous, lacking shrubs and trees. Vegetation and ...

Related URL

Link: GET DATA

Description: Download vegetation polygon data

Geographic Coverage

(Click for Interactive Map)

Spatial coordinates

N: -54.49

S: -54.78

E: 158.95

W: 158.78

Temporal Coverage

Start Date: 1979-01-01

Stop Date: 1997-09-01

Location Keywords

OCEAN > SOUTHERN OCEAN

OCEAN > SOUTHERN OCEAN > MACQUARIE ISLAND

GEOGRAPHIC REGION > POLAR

Science Keywords

BIOSPHERE > VEGETATION > VEGETATION COVER

TERRESTRIAL HYDROSPHERE > SURFACE WATER > LAKES

TERRESTRIAL HYDROSPHERE > SURFACE WATER > RIVERS/STREAMS

ISO Topic Category

BIOTA

GEOSCIENTIFIC INFORMATION

INLAND WATERS

Platform

FIELD SURVEYS

AERIAL PHOTOGRAPHS

SATELLITES

SPOT-3 > Systeme Probatoire Pour l'Observation de la Terre-3

Quality Completeness of coverage: 100%.
Completeness of classification: All categories generalised.
All categories could be further subdivided. Some amalgamation of areas smaller than 30-50m diameter.
Completeness of verification: 75%.
Completeness of coverage. The data coverage is complete for the entire dataset.
Attribute data are available for ... the entire dataset. Completeness of classification. The adopted classification method covers all features. Completeness of verification. The Polygon boundaries in some cases were generalised at the discretion of the Botanists from Macquarie University and data considered too small was omitted. Verification of features was carried out by Macquarie University using their extensive field notes and many years of local knowledge and experience.

In preparing this map, we have used as a basis the SPOT 3 merged pan/multispectral image of 22 December 1994 and the coastline prepared from this image by AUSLIG (now Geoscience Australia). We have consulted the black and white aerial photography of 6 and 7 February 1976, runs CAS 5465, CAS 8467 to 8473 and CAS 8480 to 8483. We have drawn extensively on our fieldwork and on our own and colleagues' field notes and photographs. The original digitised source data were acquired in DXF format and then corrected and enhanced by Macquarie University personnel. Definitions and descriptions were added of the Terrestrial and Marine categories as provided by Macquarie University personnel. Software used for this process was 'microstation' and 'polygen'. The final product was completed in 'Arc View' and presented at a scale of 1:25,000. All data checked for polygon closure, etc, in Microstation to create the DXF file. All lines were visually checked at 1:25 000 scale to verify that no lines crossed. The GIS package (ArcInfo) was used to do topological consistency check to detect flaws in the data structure and to flag them as errors. This check insures that all classified polygons are closed, nodes are formed at the intersection of lines and that there is only one label within each polygon, etc Structural vegetation boundaries and position of drainage lines drawn from satellite imagery, some aerial photography and field knowledge. Horizontal positional accuracy (intuitive) is 50m.

The data have been formatted according to the SCAR Feature Catalogue which includes data quality information (refer to link below).

Usually mapped to a Universal Transverse Mercator projection, Zone 57.

In 2000 the line data representing escarpments was edited by the Australian Antarctic Data Centre (AADC). A section near Bauer Bay was deleted as it was concluded this section of escarpment did not exist.
The AADC has used the revised escarpment data in the 1:50 000 maps of Macquarie Island it has produced since then.

Access Constraints The data are available for download from the links below.
Vegetation data available in shapefile format.
Topographical data available in shapefile format.
The data are stored as geographicals on a WGS84 horizontal datum.
The data in this dataset has Dataset Id = 26.

Use Constraints This data set conforms to the PICCCBY Attribution License
(http://creativecommons.org/licenses/by/3.0/).

Please follow instructions listed in the citation reference provided at the URL below when using these data.

Ancillary Keywords

vegetation

map

Data Set Progress

COMPLETE

Originating Center

AADC

Data Center

Australian Antarctic Data Centre, Australia

Data Center URL: http://data.aad.gov.au

Data Center Personnel
Name: DATA OFFICER AADC Phone: +61 3 6232 3244 Fax: +61 3 6232 3351 Email: metadata at aad.gov.au Contact Address: Australian Antarctic Division 203 Channel Highway City: Kingston Province or State: Tasmania Postal Code: 7050 Country: Australia

Distribution

Distribution Media: HTTP

Distribution Format: shapefiles

Fees: Free

Personnel

PATRICIA SELKIRK

Role: INVESTIGATOR

Phone: +61 2 9850 8144

Fax: +61 2 9850 8245

Email: pselkirk at rna.bio.mq.edu.au

Contact Address:

Macquarie University

Department of Biological Sciences

City: Sydney

Province or State: New South Wales

Postal Code: 2109

Country: Australia

DONALD ADAMSON (DECEASED)

Role: INVESTIGATOR

URSULA HARRIS

Role: TECHNICAL CONTACT

Role: DIF AUTHOR

Phone: +61 3 6232 3519

Fax: +61 3 6232 3351

Email: metadata at aad.gov.au

Contact Address:

Australian Antarctic Division

203 Channel Highway

City: Kingston

Province or State: Tasmania

Postal Code: 7050

Country: Australia

Creation and Review Dates

DIF Creation Date: 1999-10-07

Last DIF Revision Date: 2010-10-12

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