Title

Vegetation of the Guyra 1:25000 map sheet VIS_ID 240

Data Quality Statement

Name: Data Quality Statement

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

Description:

Data quality statement for Vegetation of the Guyra 1:25000 map sheet VIS_ID 240

Function: download

guyra guyra 240

Name: guyra guyra 240

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

Function: download

Code

01ec33f0-5ffa-4551-bf0a-ead8e8665270

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 sampled in 312 sites, each 20m by 20m, sites grouped using PATN statistical analysis program. Numerically derived floristic groups mapped at 1:25,000 scale from aerial photographs with extensive ground truthing in February 1998. API data transferred to 1:25,000 map sheet films using a transfer scope and then digitised into Environmental-Resource Mapping System (ERMS) GIS. Errors corrected using ERMS prior to conversion to ArcView shapefile using wpo2shp.exe program. Published in Cunninghamia 6(3).

Limitations on public access

Effective date

2009-01-10

Explanation

The dataset is complete with reference to range and field verification. Area of smallest polygon is 1 Ha. Riparian shrubland (community 23) is restricted to narrow strips along watercourses and is not shown on the maps. Small clumps of isolated trees in land >70% cleared are not delineated, also native grasslands remaining after the removal of woody canopy species are not shown on the map.

Effective date

2009-01-10

Explanation

The GIS package ERMS was used to perofrm a topological consistency check to ensure all polygons are closed, nodes are formed at the intersection of lines, all polygons are labelled once and there are no duplications.

Explanation

Checked for missing attributes All attributes were checked

Explanation

Precision: GIS data accurate to 25 metres. Determination: Deductive estimate. Comparison with 1:25,000 layer data indicated good correlation but with errors of the order indicated above in terms of position.

Explanation

The 'name' field indicates the floristic vegetation classifications included in the mapping. These have been derived from statistical analysis, interpreted from aerial photographs, ground truthed and described by botanists from the Royal Botanic Gardens. Information on structure, weediness and disturbance is also included.

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