Title

NVMP vegetation mapping Dry Lake, Gunbar, Hay, Moggumbil, One Tree, Oxley mapsheets VIS_ID 2216

Data Quality Statement

Name: Data Quality Statement

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

Description:

Data quality statement for NVMP vegetation mapping Dry Lake, Gunbar, Hay, Moggumbil, One Tree, Oxley mapsheets VIS_ID 2216

Function: download

Download package

Name: Download package

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

Description:

Download Data & Documentation

Function: download

Code

99964eeb-a9c5-462f-ab09-72550cfb9ddf

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

Vegetation derived from the Native Vegetation (Multi Attribute) Gunbar 7929 dataset. This dataset was based on API (1:50K colour) and Landsat TM data.

Limitations on public access

Effective date

2001-01-01

Explanation

Complete spatial coverage for the Gunbar 7929 1:100 000 map sheet.The minimum polygon size was 25ha therefore native vegetation communities occupying less than 25ha may not be mapped. However, when possible, communities of significance less than 25ha were sometimes delineated. Nevertheless, some rare plant community types may not be adequately represented.

Effective date

2001-01-01

Explanation

Complete spatial coverage for the Gunbar 7929 1:100 000 map sheet.The minimum polygon size was 25ha therefore native vegetation communities occupying less than 25ha may not be mapped. However, when possible, communities of significance less than 25ha were sometimes delineated. Nevertheless, some rare plant community types may not be adequately represented.

Effective date

2001-01-01

Explanation

Genamap GIS software was used to check and edit final spatial information according to standard DIPNR GIS procedures. Topological checks were completed and spatial information was edge matched if necessary using Genamap and UNIX scripts. All lines were tagged, all areas formed and verified, spurious nodes or over-shoots (dangles) were eliminated, all areas were tagged and the attribute tables completed.The final spatial layer was plotted as a hard copy map and visually checked (over a light table) against the base map to ensure that linework and tagging was correct. Edits were carried out where required.

Effective date

2001-01-01

Explanation

The estimated positional accuracy of the line work is between 12.5m and up to 75m, dependent upon the intensity of pre existing location reference data (such as contours, cadastre, etc).The dataset was based partly on the interpretation of 1:50 000 scale colour aerial photography. While most plant communities could be readily identified at this scale, some communities were difficult to positively identify. Also, defining the boundary between communities was sometimes a subjective process. In addition, the extent and distribution of native vegetation communities can expand or contract over time due to environmental influences. These factors should be considered when using the dataset.

Effective date

2001-01-01

Explanation

The dataset was based partly on the interpretation of 1:50,000 scale, colour, aerial photography. Interpretation methods were based on the standard procedures outlined in the DIPNR (2001) Guidelines for Mapping Native Vegetation (v2.1).Air photo interpreters made every attempt to undertake extensive fieldwork to check and correct polygon attributes.In addition, a five-week floristic survey was undertaken from September 10, 2001 to November 9, 2001. During this time, trained botanists visited a series of survey sites (quadrats) to aid in validating the interpretation.The location of these quadrats was based on random sampling of Environmental Stratification Units (ESU) generated through stratifying the study area using existing digital spatial layers. The Gunbar 7929 1:100 000 map sheet was partitioned into 51 environmental stratification units using land capability, landscape and coefficient of variation of monthly precipitation spatial layers. This resulted in a total of 147 quadrats being surveyed across the area covered by the dataset.In spite of these efforts, some sections of the study area were not visited.

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