Authors / CoAuthors
Unknown
Abstract
The Pre-PRL Clearing dataset shows the extent of major land clearing before Phosphate Resources Limited (PRL) began mining on the island in the early 1990Âs. It was provided to Geoscience Australia in early 2011 by PRL. No clearing of primary rainforest has occurred under PRL. The dataset is a collection of polygons, each with an associated Â`clearing yearÂ. These years are based on the year of the earliest aerial image in which they appear cleared. Aerial images were taken in 1976, 1982 and 1987. If combined with the Old Drill Hole Clearing (old_dh_clearingextent_poly.shp) dataset, a representation of all cleared areas of the island can be gained. The Pre-PRL Clearing shapefile is Â`pre_prl_clearing and contains the following fields. Field Type Width ---------------------------------------Shape Polygon 8 Year String 16 Area DECIMAL 13.3 Perimeter DECIMAL 13.3 Acres DECIMAL 13.3 Hectares Decimals 13.3
Product Type
dataset
eCat Id
81794
Contact for the resource
Custodian
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
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- GIS Dataset
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- AU-ACT
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_Internal
Publication Date
2011-01-01T00:00:00
Creation Date
Security Constraints
Legal Constraints
Status
Purpose
Maintenance Information
asNeeded
Topic Category
geoscientificInformation
Series Information
Lineage
The Pre-PRL Clearing data was digitized by hand by James Keogh from PRL in October 2010 from aerial photographs taken in 1976, 1982 and 1987. The 1976 image was used first, then 1982, then 1987 making sure that each polygon snapped to the last.
Parent Information
Extents
[-10.5667, -10.4167, 105.5333, 105.7167]
Reference System
Spatial Resolution
Service Information
Associations
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