Note: this dataset description is metadata (data about data) which describes the actual dataset in accordance with the ANZLIC (Australia New Zealand Land Information Council) Core Metadata Guidelines Version 1
ANZLIC unique identifier: ANZNS0359100087
Title: Acid Sulphate Soils - Planning Maps
Custodian: Department of Planning (DoP)
Jurisdiction: New South Wales
In their natural state Acid Sulfate Soils (ASS) are submerged but when exposed or drained, they become oxidised and sulphuric acid is produced. This reduces soil fertility, kills vegetation and reduces fish populations. The identification of the location and extent of potential acid sulphate soils (PASS) is the essential first step in managing this problem. It is preferable that only landuses that will minimise the likelihood of disturbance of the soil or groundwater be undertaken in acid sulfate soil areas. For this reason the extent of ASS should be taken into consideration when zoning lands and less intensive zones such as environmental zones maybe preferred over residential or rural (agricultural).
The ASS Planning Maps are a series of 1:25 000 maps covering all coastal councils in NSW prepared by DECC (formerly DLWC) and published by the Dept of Planning (DoP). They were prepared to be the basis for amendments to local council LEPs to incorporate ASS planning provisions similar to the 'model provisions' in the ASS Manual. Adoption of the maps as they stand or with amendments is the responsibility of councils and is subject to a section 117 (2) direction from the Minister for Planning. This direction requires that;
- councils consider the 'Acid Sulfate Soil Planning Guidelines' when preparing a draft LEP ;
- draft LEPs introduce provisions to regulate works in ASS that are consistent with the 'Acid Sulfate Soil Planning Guidelines' ;
- draft LEPs should not introduce an intensification of landuse on ASS without an environmental study. This study should be provided to DoP with lodgement of a draft LEP.
- HUMAN ENVIRONMENT Planning
- LAND Use
- SOIL
- WATER Quality
- WATER Wetlands
- Geographic extent name:
- BELLINGEN (A) - Local Government Areas - New South Wales
- Geographic extent polygon:
- 152.389 -30.569, 153.06 -30.569, 153.06 -30.182, 152.389 -30.182, 152.389 -30.569
- Geographic extent name:
- BYRON (A) - Local Government Areas - New South Wales
- Geographic extent polygon:
- 153.327 -28.767, 153.638 -28.767, 153.638 -28.463, 153.327 -28.463, 153.327 -28.767
- Geographic extent name:
- RICHMOND VALLEY (A) - Local Government Areas - New South Wales
- Geographic extent polygon:
- 152.97 -28.9, 153.095 -28.9, 153.095 -28.796, 152.97 -28.796, 152.97 -28.9
- Geographic extent name:
- COFFS HARBOUR (C) - Local Government Areas - New South Wales
- Geographic extent polygon:
- 152.795 -30.451, 153.212 -30.451, 153.212 -30.039, 152.795 -30.039, 152.795 -30.451
- Geographic extent name:
- COPMANHURST (A) - Local Government Areas - New South Wales
- Geographic extent polygon:
- 152.297 -29.684, 153.106 -29.684, 153.106 -28.972, 152.297 -28.972, 152.297 -29.684
- Geographic extent name:
- GRAFTON (C) - Local Government Areas - New South Wales
- Geographic extent polygon:
- 152.872 -29.763, 152.993 -29.763, 152.993 -29.656, 152.872 -29.656, 152.872 -29.763
- Geographic extent name:
- KEMPSEY (A) - Local Government Areas - New South Wales
- Geographic extent polygon:
- 152.269 -31.312, 153.089 -31.312, 153.089 -30.502, 152.269 -30.502, 152.269 -31.312
- Geographic extent name:
- KYOGLE (A) - Local Government Areas - New South Wales
- Geographic extent polygon:
- 152.372 -29.025, 153.183 -29.025, 153.183 -28.271, 152.372 -28.271, 152.372 -29.025
- Geographic extent name:
- LISMORE (C) - Local Government Areas - New South Wales
- Geographic extent polygon:
- 153.073 -29.073, 153.449 -29.073, 153.449 -28.517, 153.073 -28.517, 153.073 -29.073
- Geographic extent name:
- MACLEAN (A) - Local Government Areas - New South Wales
- Geographic extent polygon:
- 153.001 -29.69, 153.376 -29.69, 153.376 -29.301, 153.001 -29.301, 153.001 -29.69
- Geographic extent name:
- NAMBUCCA (A) - Local Government Areas - New South Wales
- Geographic extent polygon:
- 152.399 -30.929, 153.019 -30.929, 153.019 -30.49, 152.399 -30.49, 152.399 -30.929
- Geographic extent name:
- PRISTINE WATERS (A) - Local Government Areas - New South Wales
- Geographic extent polygon:
- 152.167 -30.42, 152.971 -30.42, 152.971 -29.345, 152.167 -29.345, 152.167 -30.42
- Geographic extent name:
- RICHMOND VALLEY (A) - Local Government Areas - New South Wales
- Geographic extent polygon:
- 152.688 -29.345, 153.484 -29.345, 153.484 -28.712, 152.688 -28.712, 152.688 -29.345
- Geographic extent name:
- TWEED (A) - Local Government Areas - New South Wales
- Geographic extent polygon:
- 153.106 -28.544, 153.585 -28.544, 153.585 -28.159, 153.106 -28.159, 153.106 -28.544
Note: The format for each Geographic extent name is: Name - Identifier - Category - Jurisdiction (as appropriate)
Geographic bounding box:
The bounding box encloses the maximum extents of the dataset. There may be voids or gaps within the bounding box, depending on the defined coverage of the dataset. Outer bounding rectangle as Latitude/Longitude coordinates based on the WGS84 datum (expressed as both Degrees Minutes Seconds and as decimal Degrees):
- North bounding latitude: 28 9 00.0 S (-28.15)
- South bounding latitude: 31 18 43.2 S (-31.312)
- East bounding longitude: 153 38 16.8 E (153.638)
- West bounding longitude: 152 09 36.0 E (152.16)
Lineage:
The map class boundaries are based on the same linework as the ASS risk maps produced by DIPNR (then Soil Conservation Service) in 1995 and revised and updated in 1997. The methodology used to produce the risk maps is documented in Naylor et al. 1998, Guidelines for the Use of ASS Risk Maps (DLWC). The planning maps adopt only the elevation classes of the risk maps and do not discriminate between high risk and low risk environments. An assumption was made that ASS may occur at up to 1.0m AHD and a further factor of safety of 1.0 m was built into the planning maps when considering whether consent should be required.
A number of gaps were identified in the dataset in 08. Data from approx 33 tiles had disappeared during file conversions in 03 which have now been rectified.
Positional accuracy:
ASS Planning Maps should be used at the scale at which they were published. Enlarging the maps will produce distortions whereby boundaries will no longer represent map units on the ground.
Landform element boundaries were delineated and published at 1:25 000 scale. Boundaries between landform classes that could be delineated reliably were drawn as solid lines and as broken lines where they were diffuse or difficult to identify. Elevation information provided on each landform element is approximate only.
Disturbed terrain was identified by aerial photograph interpretation or from sources such as maps supplied by local councils. There are some areas of disturbed terrain which are not shown on the maps. These are typically associated with urban areas where the development prevented the identification and delineation of the disturbance.
The information is only reliable at the scale of publication. A minimum mapping unit of 1.7ha. has been set as the standard of reliability. Smaller units were generally not mapped separately.
Attribute accuracy:
TheSoil_Classfield categorises the ASS Planning data into 5 classes of land based on the probability of acid sulfate soils occurrence and the type of works that might disturb them. Class 1 indicates the highest risk and Class 5 the least risk from ASS.
Where development will take place on land identified as ASS the following consent is required:
- Class 1 Any works
- Class 2 Works below natural ground surface.Works by which the watertable is likely to be lowered.
- Class 3 Works beyond 1 metre below natural ground surface. Works by which the watertable is likely to be lowered beyond 1 metre below natural ground surface.
- Class 4 Works beyond 2 metres below natural ground surface. Works by which the watertable is likely to be lowered beyond 2 metres below natural ground surface.
- Class 5 Works within 500 metres of adjacent Class 1, 2, 3 or 4. Land which are likely to lower the watertable below 1 metre AHD on adjacent Class 1, 2, 3 or 4 land.
There has been two areas of criticism of these maps. One relates to Class 2 which requires consent for all disturbance of the soil below the ground surface. This could be interpreted to include ploughing and may impact sites of up to 2.0 m AHD, which is sometimes not appropriate. Some councils (eg Taree) have chosen to subdivide class 2 into two map units to exclude ploughing from the need for consent in the higher parts of the class.
The other criticism relates to class 5, which is intended to catch activities which may impact ASS particularly by lowering the watertable in adjacent land. This class has been applied to all the remainder of the LGAs. This has lead to a lot of unnecessary enquiries from land with no association with ASS. A better approach would have been to adopt a fixed buffer of say 500 m. Even this would only be necessary in unconsolidated sediments. Councils should adopt this modification to avoid unnecessary applications and reduce the total number of maps.
Logical consistency:
All lines and polygons are labelled. All duplicates were eliminated, lines do not undershoot or overshoot. Polygons and lines were matched with adjoining map tiles. Topological consistency verification was performed as part of the quality assurance procedures using Genamap software and a series of checking procedures implemented (including visual check against field sheet).
Completeness:
Spatial data capture is complete for the entire dataset (128 maps at 1:25 000). Complete for presentation and usage at 1:25 000 only.
ASS Planning is derived from ASS Risk Maps
http://canri.nsw.gov.au/nrdd/records/ANZNS0359000004.htmlPublication on the DoP website 'Acid Sulfate Soils Planning Guidelines' http://www.planning.nsw.gov.au/rdaguidelines/documents/NSW Acid Sulfate Soils Planning Guidelines.pdf
content:
coordref:
hdatum:
Geodetic Datum of Australia (GDA94)proj:
Geographic
This dataset description does not comply (XML is not valid) with ANZLIC Core Metadata Guidelines Version 1 and XML DTD ANZMETA-NRIMS Page 1 v1.0 (metadata validation date: 2009-07-02)