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Identification

Field Value

Title

ASDST Western Mounds and Shell Current Model

Alternative title(s)

curr_etm

Abstract

The Aboriginal Sites Decision Support Tool ASDST extends the Aboriginal Heritage Information Management System (AHIMS) by illustrating the potential distribution of site features recorded in AHIMS. ASDST was first developed in 2012 by the Office of Environment and Heritage (OEH) to support landscape planning of Aboriginal Heritage. The Tool produces a suite of raster GIS modelled outputs and is held in Esri GRID format. The first suite was published in 2016 as Version 7 at 100m resolution and in Lamberts Conic Conformal Projection (LCC). The current Version 7.5 was produced by the now Department of Planning, Industry and Environment (DPIE) in 2020 at 50m resolution in Geographic Coordinate System (GCS). Each layer covers the extent of NSW.

The suite of layers includes separate predictive layers for different Aboriginal site feature types. The feature codes used in layer naming conventions are:

  • ALL = model for all feature types combined
  • AFT = predicted likelihood for stone artefacts
  • ART = predicted likelihood for rock art
  • BUR = predicted likelihood of burials
  • ETM = predicted likelihood of western mounds and shell
  • GDG = predicted likelihood of grinding grooves
  • HTH = predicted likelihood of hearths
  • SHL = predicted likelihood of coastal middens
  • STQ = predicted likelihood of stone quarries and
  • TRE = predicted likelihood of scarred trees.

The feature models have been derived in two forms:

  • The first form (“p1750XXX” where XXX denotes three letter feature code) predicts likelihood of feature distribution prior to European colonisation of NSW.

  • The second form (“curr_XXX” where XXX denotes three letter feature code) predicts feature likelihood in the current landscape.

For both sets of feature likelihood layers, cell values range from 0 – 1000, where 0 indicates low likelihood and 1000 is high likelihood.

Please note the scale is likelihood and NOT probability. Likelihood is defined as a relative measure indicating the likelihood that a grid cell may contain the feature of interest relative to all other cells in the layer.

Additionally, there are other derived products as part of the suite. These are:

  • drvd_imp = which is a model of accumulated impacts, derived by summing the difference between the pre colonisation and current version of all feature models. Cell values range from 0 – 1000, where 1000 is a high accumulated impact.

  • drvd_rel = which is a model of the reliability of predictions based on an environmental distance algorithm that looks at recorded site density across the variables used in the models.

  • drvd_srv = which is a survey priority map, which considers model reliability (data gap), current likelihood and accumulated impact. Cell values range from 0 – 1000 where 1000 indicates highest survey priority relative to the rest of the layer.

For more details see the technical reference on the ASDST website.

NB. Old layers with a suffix of “_v7” indicate they are part of ASDST Version 7 produced in 2016. The current models (Version 7.5) do not contain a version number in their name and will continue to be named generically in future versions for seamless access.

Updates applied to ASDST version 7.5

For all ASDST 7.5 data sets, the resolution was increased from a 100m cell to a 50m cell. All data sets were clipped and cleaned to a refined coastal mask. Cell gaps in the mask were filled using a Nibble algorithm. The pre-settlement data sets were derived by resampling the version 7 pre-settlement data sets to 50m cell size. The present-day data sets were derived from the version 7.5 pre-settlement layers and 2017-18 land-use mapping and applying the same version 7 parameters for estimating the preservation of each feature type on each land-use. For version 7.5, the model reliability data set was derived by resampling the version 7 data set to 50m cell size. Accumulated impact and survey priority version 7.5 data sets were derived by applying the version 7 processing algorithm but substituting the version 7.5 pre-settlement and present-day ASDST models.

Resource locator

Show on SEED Web Map

Name: Show on SEED Web Map

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

Description:

Display dataset on SEED's map

Function: download

Data Quality Statement

Name: Data Quality Statement

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

Description:

Data quality statement for ASDST Artefacts Pre1750 Model

Function: download

ArcGIS Rest Service

Name: ArcGIS Rest Service

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

Description:

ESRI Rest Service

Function: download

Unique resource identifier

Code

008542d4-9289-48a3-8a24-fb82654244ad

Presentation form

mapDigital

Edition

7.5

Dataset language

eng

Metadata standard

Name

ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata

Version

1.1

Dataset URI

https://datasets.seed.nsw.gov.au/dataset/008542d4-9289-48a3-8a24-fb82654244ad

Purpose

To support landscape planning of Aboriginal Heritage.

Status

completed

Spatial representation type

grid

Spatial reference system

Authority code

GDA94 Geographic (Lat\Long)

Code identifying the spatial reference system

4283

Spatial resolution

50 m

Additional information source

For further information and to download the reference to the technical manual describing product derivation, please visit this website: https://www.environment.nsw.gov.au/research-and-publications/our-science-and-research/our-research/cultural-science/aboriginal-sites-decision-support-tool

Classification of spatial data and services

Field Value

Topic category

Society

Keywords

Field Value

Keyword set

keyword value

HERITAGE-Aboriginal

HUMAN-ENVIRONMENT-Planning

Originating controlled vocabulary

Title

ANZLIC Search Words

Reference date

2008-05-16

Geographic location

West bounding longitude

141

East bounding longitude

154

North bounding latitude

-38

South bounding latitude

-28

NSW Place Name

NSW

Vertical extent information

Minimum value

-100

Maximum value

2228

Coordinate reference system

Authority code

urn:ogc:def:cs:EPSG::

Code identifying the coordinate reference system

5711

Temporal extent

Begin position

1990-01-01

End position

N/A

Dataset reference date

Date type

creation

Effective date

2012-12-20

Date type

publication

Effective date

2021-06-22

Date type

revision

Effective date

2020-07-01

Resource maintenance

Maintenance and update frequency

asNeeded

Contact info

Organisation name

Department of Planning, Industry and Environment

Full postal address

PO Box A290

Sydney South

NSW

1232

Australia

data.broker@environment.nsw.gov.au

Telephone number

131555

Facsimile number

02 9995 5999

Email address

data.broker@environment.nsw.gov.au

Responsible party role

pointOfContact

Quality and validity

Field Value

Lineage

The ASDST models and derived layers were developed using Aboriginal site data from the Aboriginal Heritage and Information Management System (AHIMS). The models were derived using presence only statistical modelling using the GRASP tool in S-Plus (see: Lehmann, A., Overton, J. M. C. & Leathwick, J. R., 2002. GRASP: Generalized Regression Analysis and Spatial Predictions. Ecological Modelling, 157: 189-207). Each model uses a unique combination of variables, but can include various terrain indices; various indices of proximity to water; geology; soils; pre1750 vegetation and climate variables. The derived products also make use of land-use, native vegetation extent and tenure data to estimate site likelihood in the present landscape. The products describing model reliability and survey priority utilised the environmental distance algorithm of Faith and Walker (Faith, D. P. and P. A. Walker (1996). "Environmental diversity: on the best-possible use of surrogate data for assessing the relative biodiversity of sets of areas." Biodiversity and Conservation 5(4): 399-415.). All spatial data was current and accurate at the time of model completion on the 20/12/2012.

Grids were published in 2016, updated in 2020 and republished 2021.

Constraints related to access and use

Field Value

Constraint set

Use constraints

This data is provided under a Creative Commons Attribution 4.0 licence http://creativecommons.org/licenses/by/4.0 Attribute 'Department of Planning, Industry and Environment ' in publications using this data.

Limitations on public access

Data Quality

Field Value

Scope

dataset

Responsible organisations

Field Value

Responsible party

Contact position

Data Broker

Organisation name

Department of Planning, Industry and Environment

Full postal address

PO Box A290

Sydney South

NSW

1232

Australia

data.broker@environment.nsw.gov.au

Telephone number

131555

Facsimile number

02 9995 5999

Email address

data.broker@environment.nsw.gov.au

Web address

http://www.planning.nsw.gov.au/

Responsible party role

pointOfContact

Metadata on metadata

Field Value

Metadata point of contact

Contact position

Data Broker

Organisation name

Department of Planning, Industry and Environment

Full postal address

PO Box A290

Sydney South

NSW

1232

Australia

data.broker@environment.nsw.gov.au

Telephone number

131555

Facsimile number

02 9995 5999

Email address

data.broker@environment.nsw.gov.au

Responsible party role

distributor

Metadata date

2021-06-22

Metadata language

eng