Title

Murray Darling Basin M305 Structural Vegetation Layer. VIS_ID 917

Data Quality Statement

Name: Data Quality Statement

Protocol: WWW:DOWNLOAD-1.0-http--download

Description:

Data quality statement for Murray Darling Basin M305 Structural Vegetation Layer. VIS_ID 917

Function: download

Vegetation MurrayDarling M305 VIS 917

Name: Vegetation MurrayDarling M305 VIS 917

Protocol: WWW:DOWNLOAD-1.0-http--download

Function: download

Code

6b56af1b-1f7a-4018-a505-44da4043cd0e

Name

ISO 19115

Edition

2016

Type

vector

Geometric Object Type

curve

Geometric Object Count

1

Code identifying the spatial reference system

4283

Topic category

Title

ANZLIC Search Words

Reference date

2008-05-16

Coordinate reference system

Authority code

urn:ogc:def:cs:EPSG::

Code identifying the coordinate reference system

5711

End position

N/A

Contact info

Contact position

Data Broker

Organisation name

NSW Department of Climate Change, Energy, the Environment and Water

Telephone number

131555

Email address

data.broker@environment.nsw.gov.au

Web address

https://www.nsw.gov.au/departments-and-agencies/dcceew

Responsible party role

pointOfContact

Lineage

Linework derived by visual interpretation of hardcopy Landsat TM imagery printed at 1:100 000. Polygon's attributed by combination of visual interpretation and low intensity fieldwork. Linework scanned, attributes then added manually. Mapsheets edge matched in ArcInfo and attribute tables combined (both by LIC) to produce single basin wide attribute table. The original M305 SVL coverage had vegetation coding errors as identified by Andrews and Flemons, (1997) Sivertsen and Cameron, (1999). This coverage was recorded by Kate Brandis using the addition of two new fields: New_tag - this is a map unit coding, it is based on the dominant species in each polygon, as identified in the original M305 data. New_tag is derived from the first two letters of the Genus and Species names eg. Eucalyptus populnea = Eupo. Note where duplicate codes occurred 3 letters of the species name were used. (This field was original added for use in NVIS); New_code - this field replaces the original Tag field. The original M305 dataset resulted in different codes being used for different species. This version corrects this error. All the species occurring in M305 are consistently referred to by the same numeric code. This numeric code is based upon the Wildlife Data Unit's CAPS Codes (u:/users/gis/share/wdu_data/caps0200.xls). Non species were assigned codes starting at 1000. Note: there were no alterations made to linework or polygons. Changes were only made to the attribute table in the form of field additions.

Limitations on public access

Effective date

2009-01-10

Explanation

The dataset is complete for the NSW portion of the Murray Darling Basin, to the specifications detailed in Ritman, K.T. (1995). Structural Vegetation Data: a specifications manual for the Murray Darling Basin Project M305. NSW Department of Land and Water Conservation, Land Information Centre, Bathurst

Effective date

2009-01-10

Explanation

The dataset has ArcInfo polygon topology, all polygons are labelled. Additional information can be obtained from Andrews and Flemons (1997) and Ritman, K.T. (1995). See additional metadata. The addition of the two new fields amends errors in the original dataset increasing consistency of the vegetation coding.

Explanation

Checked for missing attributes All attributes were checked

Explanation

No formal accuracy assessment has been carried out. See NPWS report Murray Darling Basin Project M305: Methodology for Mapping Structural Vegetation August 1997. The specified positional accuracy of the structural vegetation dataset is consistent with 1:100,000 scale topographic mapping standards. The geo-referencing of Landsat TM scenes is to a RMS error less than 45 metres (1.5 pixels).

Explanation

No formal accuracy assessment has been carried out. See NPWS report Murray Darling Basin Project M305: Methodology for Mapping Structural Vegetation August 1997 Regular cross-checking and review of interpretations was undertaken to maximise the consistency of mapping. The attribution and edge matching to adjacent map sheets of the vegetation dataset was progressively verified. Qualified interpretation staff undertook this task. Those components of the data collection that involve the additional process of line digitising and tagging are subject to a two stag verification of attribution. The first stage is a direct verification of the digital linework and tags against the original hardcopy interpretations by digitising staff. The second stage is the production of check plots that are returned to interpreters for validation. Attribute accuracy varies, among other influences, according to the quality of vegetation survey information available for any given area that is quite variable across the NSW section of the Murray-Darling Basin.

Contact position

Data Broker

Organisation name

NSW Department of Climate Change, Energy, the Environment and Water

Telephone number

131555

Email address

data.broker@environment.nsw.gov.au

Web address

https://www.nsw.gov.au/departments-and-agencies/dcceew

Responsible party role

pointOfContact

Contact position

Data Broker

Organisation name

NSW Department of Climate Change, Energy, the Environment and Water

Telephone number

131555

Email address

data.broker@environment.nsw.gov.au

Web address

https://www.nsw.gov.au/departments-and-agencies/dcceew

Responsible party role

pointOfContact