CIGIS metadata - Register of National Estate

Dataset

Title

Custodian

Environment Australia

Jurisdiction

Australia

Description

Abstract

Data were provided to Geoscience Australia by Environment Australia - Register of the National Estate and contain natural and historical heritage data (point and polygon) for Christmas Island. Heritage data are in both points and polygon form. There are currently 4 records in the heritage points theme and 61 records in the natural and heritage themes. Geoscience Australia noted that in a previous version of the heritage points theme there are 38 registed points in comparison to the 4 in the new dataset.

These two polygon datasets that were supplied have been separated into two shapefiles, 'natural heritage' and 'historic heritage' respectively. Natural data encompasses natural features including some areas of pinnalce fields and extends offshore. Historic heritage data is comprised of features that are of manmade origin and that are of historic significance. These features include the cantilevers, the Christmas Island Administrators house, and some others.

Search Word(s)

HUMAN ENVIRONMENT Structures and Facilities
HUMAN ENVIRONMENT Urban Design
LAND Use

Geographic Extent Name(s)

Christmas Island Edition 1 2010 1:30000 - Geoscience Australia GEOCAT 70145

Data Currency

Beginning Date

Not Known

Ending Date

2001-05-07

Dataset Status

Progress

Complete

Maintenance and Update Frequency

As Required

Access

Stored Data Format

DIGITAL - ArcView Shapefiles: Point, Polygon

Available Format Type

DIGITAL - ArcView Shapefiles: Point, Polygon

Access Constraint

Restricted, see contact details below.

Data Quality

Lineage

Data were provided to Geoscience Australia via an email from Environment Australia. Projection of supplied data is geographic (WGS72)/decimal degrees. No other metadata was supplied by RNE.

GA then projected the data to Christmas Island Grid 1985 (CIG85). With the apparent low resolution of the polygon natural heritage data, they were found to compare well to the AUSLIG 1:25000 features. The historic heritage data appears to be of higher resolution (polygon data consists of building outlines) but does not overlay with the orthophotography or cadastre. As a result of this GA shifted these data by 16.5 metres westward to match existing data.

The polygon data was then all merged together, but because of polygon overlap natural heritage data was converted into its own shapefile. The heritage data is now presented as points data and polygons named historic and natural heritage data. In September 2003 this dataset was converted to the MGA(GDA94) projection using an x y shift (550015 = x, 8780001 = y) on the CIG85 projection.

Positional Accuracy

The overall accuracy of the merged data is correct to approximately 3 metres. In the case of the original historic data, comparisons made against orthophotography found a difference of 16.5m. The coastline of the natural heritage data closely matches the form of the AUSLIG 1:25000 data so positioned to this.

Attribute Accuracy

Not documented from source, but all fields are full and because the data is concerned with heritage items most of the fields contain names and locations. The fields name, class and staus appear to be most beneficial to users as they describe the name of the heritage feature, the class they are in, and whether the feature is registered or not.

Logical Consistency

These data supplied by Environment Australia contain fields that follow logical data structure and consistency. All points and polygons have a name, class, registered number (from Register of National Estate of Environment Australia) and a location.

Completeness

These data covers the whole island, however all items of historical heritage are located in the North East of the island. The natural heritage polygon covers the entire island and extends offshore.

Contact Information

Contact Organisation

Geoscience Australia

Contact Position

Mail Address

Cnr Jerrabomberra Ave and Hindmarsh Drive

Locality

SYMONSTON

State

ACT

Country

Australia

Postcode

2609

Telephone

(02) 6249 9479

Facsimile

(02) 6249 9983

Electronic Mail Address

keith.porritt@ga.gov.au

Metadata Date

9-12-2003

Additional Metadata

Projection

UTM (WGS84) zone 48s

Printed

June 2012


Dataset
Title	Register of National Estate
Custodian	Environment Australia
Jurisdiction	Australia
Description
Abstract	Data were provided to Geoscience Australia by Environment Australia - Register of the National Estate and contain natural and historical heritage data (point and polygon) for Christmas Island. Heritage data are in both points and polygon form. There are currently 4 records in the heritage points theme and 61 records in the natural and heritage themes. Geoscience Australia noted that in a previous version of the heritage points theme there are 38 registed points in comparison to the 4 in the new dataset. These two polygon datasets that were supplied have been separated into two shapefiles, 'natural heritage' and 'historic heritage' respectively. Natural data encompasses natural features including some areas of pinnalce fields and extends offshore. Historic heritage data is comprised of features that are of manmade origin and that are of historic significance. These features include the cantilevers, the Christmas Island Administrators house, and some others.
Search Word(s)	HUMAN ENVIRONMENT Structures and Facilities HUMAN ENVIRONMENT Urban Design LAND Use
Geographic Extent Name(s)	Christmas Island Edition 1 2010 1:30000 - Geoscience Australia GEOCAT 70145
Data Currency
Beginning Date	Not Known
Ending Date	2001-05-07
Dataset Status
Progress	Complete
Maintenance and Update Frequency	As Required
Access
Stored Data Format	DIGITAL - ArcView Shapefiles: Point, Polygon
Available Format Type	DIGITAL - ArcView Shapefiles: Point, Polygon
Access Constraint	Restricted, see contact details below.
Data Quality
Lineage	Data were provided to Geoscience Australia via an email from Environment Australia. Projection of supplied data is geographic (WGS72)/decimal degrees. No other metadata was supplied by RNE. GA then projected the data to Christmas Island Grid 1985 (CIG85). With the apparent low resolution of the polygon natural heritage data, they were found to compare well to the AUSLIG 1:25000 features. The historic heritage data appears to be of higher resolution (polygon data consists of building outlines) but does not overlay with the orthophotography or cadastre. As a result of this GA shifted these data by 16.5 metres westward to match existing data. The polygon data was then all merged together, but because of polygon overlap natural heritage data was converted into its own shapefile. The heritage data is now presented as points data and polygons named historic and natural heritage data. In September 2003 this dataset was converted to the MGA(GDA94) projection using an x y shift (550015 = x, 8780001 = y) on the CIG85 projection.
Positional Accuracy	The overall accuracy of the merged data is correct to approximately 3 metres. In the case of the original historic data, comparisons made against orthophotography found a difference of 16.5m. The coastline of the natural heritage data closely matches the form of the AUSLIG 1:25000 data so positioned to this.
Attribute Accuracy	Not documented from source, but all fields are full and because the data is concerned with heritage items most of the fields contain names and locations. The fields name, class and staus appear to be most beneficial to users as they describe the name of the heritage feature, the class they are in, and whether the feature is registered or not.
Logical Consistency	These data supplied by Environment Australia contain fields that follow logical data structure and consistency. All points and polygons have a name, class, registered number (from Register of National Estate of Environment Australia) and a location.
Completeness	These data covers the whole island, however all items of historical heritage are located in the North East of the island. The natural heritage polygon covers the entire island and extends offshore.
Contact Information
Contact Organisation	Geoscience Australia
Contact Position	-
Mail Address	Cnr Jerrabomberra Ave and Hindmarsh Drive
Locality	SYMONSTON
State	ACT
Country	Australia
Postcode	2609
Telephone	(02) 6249 9479
Facsimile	(02) 6249 9983
Electronic Mail Address	keith.porritt@ga.gov.au
Metadata Date	9-12-2003
Additional Metadata
Projection	UTM (WGS84) zone 48s
Printed	June 2012