Contacts

Identifiers and Keywords

ANZLIC Id

ANZVI0803002643 

Victorian Spatial Data Library (VSDL) Schema

VMREFTAB:TRANSFORM66_94 

Jurisdiction

Victoria 

Topic category

• Geoscientific information

Constraints

Use limitation

The test data is not to be referred to by users as verifying compliance with NRE or ICSM standards. 

Classification

Unclassified 

Creative Commons Attribution 4.0 (CC-BY)

• 
• License Text

Other Dataset Details

Date (Revision)

2022-07-14

Date (Publication)

2023-06-15T11:24:24

Status

Completed 

Purpose

Validate software and data used to transform Land Victoria's data from AGD66 to GDA94 datum. 

Credit

The data set selection, test design, software management and output validation is credited to: Geoff Parkes Land Information Group Ross Honeyman Land Information Group Dr Philip Collier Department of Geomatics Melbourne University Martin Hale LIG 

Supplemental Information

Related Documents: None 

Maintenance and update frequency

As needed 

Maintenance date (Publication)

2023-04-14T22:40:14

Spatial

Spatial representation type

Text, table 

Reference system identifier

4283

Temporal

Begin date

2002-07-01 

End date

2003-07-01 

Quality

Conceptual Consistency

submillimter 

Missing Data

The data set covers the state of Victoria and immediate surrounds and consists of 160 points spread across the state of Victoria and includes 60 points sourced from the (ICSM) 'Sample AGD66 - GDA94 Transformation' points set contained in the file Transtest.xls found in the GDA Technical Manual (http://www.anzlic.org.au/icsm/gdatm/). The sub set of ICSM points are located in and immediately around the state of Victoria. Completeness Verification: This data set was generated by Land Victoria staff using FME (Build 444) configured to use the AGD66/GDA94 NTv2 grid file 'A66 National (13.09.01).gsb'. The starting data were AGD66 geographicals in decimal degrees to 15 decimal places. The actual values supplied as input to FME were the latitude and longitude coordinates expressed in decimal degrees. These were computed from corresponding degrees, minutes seconds values prior to being fed into FME. Coordinate pairs were then computed directly from these AGD66 geographical values using FME's @eproject function. The FME outputs were then verified by a member of the Department of Geomatics, University of Melbourne by comparison with GDAit and GDAy transformation software (refer to ICSM GDA web site at www.anzlic.org.au/icsm/gdatm/index.html) and formulae derived from first principles as follows: 1. Geographical coordinates The GDA94 latitudes and longitudes produced by FME were compared to results from both GDAit and GDAy. A perfect agreement to 9 decimal places of degree resulted. The number of significant decimal places for mathematical comparison was selected to ensure reliable backwards and forwards transformation processing could be performed such that the position solution would not degrade after many transformations between datums at the submillimetre level. 2. Universal Transverse Mercator Projection coordinates The MGA94 coordinates produced by FME were then compared to the results from GDAit and GDAy with small discrepancies ranging up to about 0.3 mm between all three solutions. It is believed that these differences are likely to be the result of a small rounding affect caused through the conversion from geographicals to map grid. These differences are not considered to cause concern for users. 3. VicGrid Vicgrid66 transformations where verified by comparing FME results with results obtained via ESRI's ArcInfo project file command. Vicgrid94 transformations were verified by comparing FME results with Phil Collier's testing process. Agreement was verified at about 0.1 mm. (refer to www.giconnections.vic.gov.au for vicgrid parameters). 

Attribute Quality

1:1 

Positional Accuracy

Datum transformation and coordinate conversion was verified at the submillimetre level. 

Lineage

Statement

Dataset Source: The data was processed initially in June 2002 by the Land Information Group and later verified by, the Department of Geomatics, University of Melbourne in the same month. Dataset Originality: Primary 

Attributes

Column Name	Obligation	Unique	Data Type	Data Length	Data Precision	Data Scale	Reference Table Owner	Reference Table Name	Reference Table Code Column Name	Short Column Name	Definition
AGD66_LAT	O	N	NUMBER	22	11	9	NONE	NONE	NONE	AGD66_LAT
GDA94_LAT	O	N	NUMBER	22	11	9	NONE	NONE	NONE	GDA94_LAT
AMG_NORTH	O	N	NUMBER	22	11	4	NONE	NONE	NONE	AMG_NORTH
MGA_EAST	O	N	NUMBER	22	10	4	NONE	NONE	NONE	MGA_EAST
ZONE	O	N	NUMBER	22	2	0	NONE	NONE	NONE	ZONE
POINT	O	N	NUMBER	22	5	0	NONE	NONE	NONE	POINT
UFI	O	N	NUMBER	22	14	0				UFI
UFI_CREATED	O	N	DATE	7						UFI_CR
VICGRID66_NORTH	O	N	NUMBER	22	11	4	NONE	NONE	NONE	VG66_N
VICGRID94_NORTH	O	N	NUMBER	22	11	4	NONE	NONE	NONE	VG94_N
AMG_EAST	O	N	NUMBER	22	10	4	NONE	NONE	NONE	AMG_EAST
VICGRID66_EAST	O	N	NUMBER	22	11	4	NONE	NONE	NONE	VG66_E
MGA_NORTH	O	N	NUMBER	22	11	4	NONE	NONE	NONE	MGA_NORTH
AGD66_LONG	O	N	NUMBER	22	12	9	NONE	NONE	NONE	AGD66_LONG
VICGRID94_EAST	O	N	NUMBER	22	11	4	NONE	NONE	NONE	VG94_E
GDA94_LONG	O	N	NUMBER	22	12	9	NONE	NONE	NONE	GDA94_LONG

About the Metadata Record

Metadata identifier

urn:uuid / 62112cd5-227d-508f-8d06-0e2b2775f703

Resource Type

Non geographic dataset 

Date info (Creation)

Date info (Revision)

2022-07-14

Standard Name

ISO 19115-3:2018 

Profile Name

DELWP Profile 

Profile Version

Version 1 

Profile Date

2019-05-24 

Metadata Constraints

Classification

Unclassified