Title

Central Tablelands Vegetation, API. VIS_ID 4163

Data Quality Statement

Name: Data Quality Statement

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

Description:

Data quality statement for Central Tablelands Vegetation, API. VIS_ID 4163

Function: download

Vegetation CWLachlanCMA CentTab2010 4163

Name: Vegetation CWLachlanCMA CentTab2010 4163

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

Function: download

Code

097713dc-b159-4093-9747-ca4547dacb37

Name

ISO 19115

Edition

2016

Type

vector

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

The NSW Department of Environment & Conservation (DEC) was contracted by Central West and Lachlan Catchment Management Authorities (CMAs) to produce an extant and 'pre-clearing' vegetation map for the two catchments. After an extensive audit of existing vegetation data, it was found that approx 2 million hectares of the study area, mainly in the central tablelands, had little or no vegetation information. Given time and resource constraints, the gaps were filled using air photo interpretation (API) to delineate broad vegetation groups based on overstorey combinations. API was undertaken jointly by three separate sub-contractors (O. Maguire, M. Porteners & C Harre), as well as by two DECCW staff (H. Knight and A. Jowett).

Vegetation polygons were attributed with dominant overstorey species and various land features through aerial photograph interpretation of contact prints at a scale of either 1:25,000 or 1:50,000 (availablility was 1995). The mapping covers Euchareena, Mudgee, Orange, Bathurst, Blayney, part Oberon, part Wellington and part Gulgong 1:100,000 mapsheets. Polygons were attributed using the API pathway described in Central West and Lachlan CMA Vegetation Mapping project (DECC 2006a and DECC 2006b). Areas with a tree crown cover percentage (CCP) of greater than or equal to 5% were mapped, along with a range of special features (e.g. grasslands or rainforests). The minimum polygon size delineated by mappers was 25ha (continuous vegetation), with the exception of remnant vegetation (10ha) and special features (5ha). All linework was digitised and rectified by a separate sub-contractor (Pintech Pty Ltd, Melbourne).

The ultimate product for CMAs was mapping of broad vegetation types (BVTs) described in the project reports (DEC 2006a, DEC 2006b). The overstorey combinations recorded by API interpreters were manually allocated to the final list of CMA BVTs by DECC botanists. One API contractor (O Maguire) attributed polygons directly to broad vegetation types using a numerical code. This code does not correspond to the final BVT numerical code because the BVT list was altered and changed as the project progressed, so care must be taken if using the raw API codestring. Also, as a result the raw API undertaken by O Maguire is not able to be described using dominant species.

Supplementary Information This dataset was updated in October 2010. Error checking and attribute modification was undertaken by DECCW staff in Dubbo Macquarie & Wingewarra St offices.Codestrings were expanded into descriptive terms and errors were fixed. Some BVT attribution was amended. The linework was not altered.

Limitations on public access

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