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                <gco:DateTime>2018-06-18T06:16:14</gco:DateTime>
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                        <gco:CharacterString>BA ALL Assessment Units 1000m 'super set' 20160516_v01</gco:CharacterString>
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                <gco:CharacterString>## **Abstract** 

The dataset was created by the Bioregional Assessment Programme.  The History Field in this metadata statement describes how this dataset was created.


A 1000 m \* 1000m vector grid over the entire Bioregional Assessment Bioregions/Preminary Areas of Extent (using the boundary that is largest) starting at the whole km to ensure grid lines fall exactly on the whole km. The grid is in Australia Albers (GDA94) (EPSG 3577).  This grid is intended as the template for standardized assessment units for the following bioregional assessment regions:


Hunter

Namoi

Clarence-Moreton

Galilee


Please note for the Gloucester subregion model a 500m grid ( GUID ) is proposed to be used as the standard assessment unit due to the finer resolution of the output models.

To facilitate processing speed and efficiency  each of the above Bioregional Assessments have their own grid and extent created from this master vector grid template, (please see Lineage).

The unique ID field for each grid cell is AUID and starts from 1. The grid also has a column id and row for easy reference and processing.

## **Purpose** 

The GRID is an attempt to standardise (where possible) outputs of models from BA assessments and is a whole of BA template for the groundwater and potentially surface water teams of the above mentioned assessment areas.

## **Dataset History** 

The Vector grid was generated using the Fishnet tool in ArcGIS. The following fields were added:

AUID - Assessment Unit Unique Id

R001_C001 - A row and column id was calculated using the following python code in the field calculator in ArcGIS where 2685 is the number of rows in the grid and 2324 is the number of columns.


'R' + str(( !OID!-1)/2685).rjust(3, '0') + '_C' + str(( !OID!-1)%2324).rjust(3, '0') 

  
A spatial index was added in ArcGIS 10.1 to increase processing and rendering speed using the Spatial index tool from the ArcToolbox.


The following parameters were used to generate the grid in the Create Fishnet tool in ArcGIS 10.1


Left:  -148000

Bottom: -4485000

Fishnet Origin Coordinate

x Coordinate  = -148000    Y Coordinate -4485000


Y-Axis Coordinate

X Coordinate -148000        Y Coordinate -4484990

Cell Height - 1000m

Cell Width - 1000m

Number of rows 0

Number of columns 0

Opposite corner: default

Geometry type: Polygon

 
Y

## **Dataset Citation** 

XXXX XXX (2016) BA ALL Assessment Units 1000m 'super set' 20160516_v01. Bioregional Assessment Source Dataset. Viewed 13 March 2019, http://data.bioregionalassessments.gov.au/dataset/6c1aa99e-c973-4472-b434-756e60667bfa.</gco:CharacterString>
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                        <gco:CharacterString>Namoi subregion</gco:CharacterString>
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