Native Vegetation Floristic Areas - Pre-European Settlement - Agricultural Region (Incomplete Versn)

Dataset Number1174
Dataset TitleNative Vegetation Floristic Areas - Pre-European Settlement - Agricultural Region (Incomplete Versn)
CustodianData Authority: Department for Environment and Water
Data Provider: Department for Environment and Water

Description

DescriptionThis dataset represents the State Government's key Pre-European Settlement floristic vegetation mapping layer for the SA agricultural region. It identifies floristic composition and general structural information (referred to as vegetation communities) of areas of native vegetation thought to have been found at a particular location in the South Australia agricultural region prior to European settlement (1836).
UsageThis information is a key element in the understanding of the pre-settlement distribution of fauna and flora. Pre-European settlement vegetation information is also significant information required for any environmental analysis aiming to determine conservation status of remnant (extant) native vegetation types, and vegetation types that are poorly represented in the reserve system. The mapping can be used to provide information on a regional or local scale. This dataset is available for government, non government and community groups.

Data Quality

LineageThe vegetation community type and delineation of boundaries is based on a variety of sources, including: historical and contemporary aerial photography (including orthophotography), original land survey maps for the hundreds, soil landscape mapping by DENR (formally DWLBC), contour mapping, watercourse mapping, Forestry SA information and extant regional floristic mapping (DENR). Pre 2007, boundaries were digitised onto a mylar medium using a 1:50,000 topographic mapsheet base. These mapsheets were then digitised into Arc/Info coverages with vegetation types recorded as coded mapping groups as polygon attributes. Individual mapsheets were then brought together using GIS techniques and edge-matched for internal polygon coding consistency. This was undertaken on a region by region basis as a series of vegetation mapping projects with GIS outputs maintained as individual region-based datasets. Since 2007 new Pre-European settlement vegetation mapping has been captured directly into a State-wide layer (in a spatial edit database environment only - with mapping still delivered as region-based datasets). In 2010 the region-based Pre-European settlement mapping groups (vegetation communities) were consolidated within the State-wide layer, in an attempt to aggregate similar vegetation communities mapped in adjacent/contiguous regions. The dataset has been delivered as a state-wide layer since this time.
CompletenessDataset is incomplete for the Agricultural Region of SA, in particular the parts of the Mid North, Eyre Peninsula and Far West regions. Mapping is complete for the South East, Murray Mallee, Western Murray Flats, Adelaide Plains, South Mount Lofty and parts of the Mid North region. The final dataset will be a complete Agricultural region layer indicating presence and type of native vegetation (no date has been established for dataset completion). Historic Pre-European Settlement vegetation mapping datasets that are available for SA have been excluded from this dataset, due to the coarse scale of these datasets. These datasets are: Bauer (Kangaroo Island), Boomsma (State-wide) and Carnahan (Australia-wide).
Positional AccuracyThe positional accuracy is dependent on the original source of the imagery and the capture process and, where applicable, artefacts of the imagery's rectification. This information is stored as attributes on the spatial data at the individual polygon level. Pre-European settlement vegetation communities have generally been mapped at 1:50,000 scale using a combination of 1:50,000 topographic features and 1:40,000 aerial photographs, except for the South East and Adelaide Plains regions. The Adelaide Plains is mapped at 1:250,000 scale onto a regional base map, with boundaries representing a guide only. The South East region was mapped from unrectified 1945 1:20,000 black and white RAAF aerial photography (for subcoastal areas), 1:50,000 black and white 1969 and 1981 aerial photographs and. 1:40,000 colour aerial photographs. Pre 2007, vegetation community boundaries were digitised from hardcopy photographs using the appropriate 1:50,000 topographic mapsheet spatial boundaries for spatial registration and correction. Since 2007 the boundaries have been captured using ortho-rectified aerial photography mosaics and heads-up digitising techniques directly into a GIS. All Pre-European settlement vegetation community boundaries represent an arbitrary line that is based on a subjective assessment of the best information available at the time of mapping. PLEASE NOTE: the Pre-European settlement vegetation mapping should not be used at scales beyond which it was captured - this scale is recorded against each polygon feature in the vegetation mapping data attribute table, refer to attributes in the `MINSCALE' field of the polygon dataset.

Geographic Extent

Extent NameAgricultural Region - South Australia
Min Easting or Longitude132.25
Min Northing or Latitude-38
Max Easting or Longitude141
Max Northing or Latitude-32.25

Dataset Status

Initially Acquired19-NOV-2009
Last Updated03-SEP-2010
Update FrequencyAs required
Maintenance MethodThe layer is updated as new mapping project are completed or when current mapping is significantly updated. Edgematching between regions is done when time permits.
LicenseingCC BY (Attribution)

Attributes

TableNameField AliasData TypeDescription
Veg.PEVEGETATION_LUTPE_VEG_ID IntegerVegetation group code - links to PE_VEG_ID1, PE_VEG_ID2 and PE_VEG_ID3
Veg.PEVEGETATION_LUTGENFORMDESC IntegerBroad structural formation description based on SA Structural Formation Table and amalgamation of types
Veg.PEVEGETATION_LUTFORMDESC_PE CharacterStructural formation description based on SA Structural Formation Table
Veg.PEVEGETATION_LUTOVERSTOREY_PE CharacterDescribes the dominant overstorey species for the vegetation group
Veg.PEVEGETATION_LUTUNDERSTOREY_PE CharacterDescribes the dominant understorey species for the vegetation group
Veg.PEVEGETATION_LUTPEVEG_DESCRIPTION CharacterFull description for the vegetation group.
Veg.PEVEGETATION_LUTENVIRON_DESCRIPTION CharacterEnvironmental descriptions for the group summarised from survey site data or knowledge of the group with soils, landforms and other topographic and locational information.
Veg.PEVegetationFEATURECODE Long IntegerDEH adaption of Australian standard coding to identify landcover categories. All pre-European vegetation is 6018.
Veg.PEVegetationVEG_ID1 text(PE_VEG_ID1) Detailed floristic description code for first dominant vegetation group in polygon, if not applicable will be recorded as "NULL"
Veg.PEVegetationVEG_ID2 text(PE_VEG_ID2) Detailed floristic description code for second dominant vegetation group in polygon, where applicable, if not applicable will be recorded as "NULL"
Veg.PEVegetationVEG_ID3 text(PE_VEG_ID3) Detailed floristic description code for third dominant vegetation group in polygon, where applicable, if not applicable will be recorded as "NULL"
Veg.PEVegetationPE_VEG_ID1_PERCENT short integerProportion of first vegetation group in polygon, where it is unknown the data is recorded as "NULL" and where no vegetation type is identified, it is zero.
Veg.PEVegetationPE_VEG_ID2_PERCENT short integerProportion of second vegetation group in polygon, where it is unknown the data is recorded as "NULL" and where no vegetation type is identified, it is zero.
Veg.PEVegetationPE_VEG_ID3_PERCENT short integerProportion of third vegetation group in polygon, where it is unknown the data is recorded as "NULL" and where no vegetation type is identified, it is zero.
Veg.PEVegetationGROUNDTRUTH textEach feature is described with the accuracy of the data used to underpin the mapping. Usage of codes is limited as codes have evolved recently (since 1998). Survey Sites (SU) - DEH methodologySELECT 1 FROM DUAL; Ground Truth Site (GS) - methodology developed by DEHSELECT 1 FROM DUAL; Roadside vegetation survey (RV) - DEH methodologySELECT 1 FROM DUAL; Needs Checking (NC) - based on interpretation during mapping SELECT 1 FROM DUAL; Not Visited (NV), Ground Truth Trip (GT) - general field work undertakenSELECT 1 FROM DUAL; Unknown (UN)SELECT 1 FROM DUAL; Field work for floristic mapping (FT) - undertaken with known list of mapping groupsSELECT 1 FROM DUAL; Prioirty Check (PC) - highlighted that mapping was very unsure of what feature wasSELECT 1 FROM DUAL; Previous Floristic mapping (PM) - using other existing digital or hard copy mappingSELECT 1 FROM DUAL; Reserves Database (RD) - species list for reserves DEH data.
Veg.PEVegetationSTATE textCode to describe the state the data falls within. State borders are based on TOPO.SouthAust_arc dataset.
Veg.PEVegetationMU_50 short integerUnique regional vegetation description for first group, derived from regional mapping projects and will not be maintained during ongoing capture of data INTO Statewide layer.
Veg.PEVegetationMU_50X short integerUnique regional vegetation description for second group, derived from original regional mapping projects and will not be maintained during ongoing capture of data INTO Statewide layer.
Veg.PEVegetationMU_50XX short integerUnique regional vegetation description for third group, derived from original regional mapping projects and will not be maintained during ongoing capture of data INTO Statewide layer.
Veg.PEVegetationPROJECT textDescription to identify the project that defined vegetation groups and linework.
Veg.PEVegetationFEATURERELIABILITYDATE DateDate of the imagery used to delineate vegetation. In most cases where flight runs for imagery varied across a region, the date is summarised to the most recent date.
Veg.PEVegetationATTRIBUTERELIABILITYDATE DateDate of the visit data used to define the vegetation. In most cases where site dates varied across a region the date is summarised to the most recent date.
Veg.PEVegetationHORIZONTALACCURACY DoubleThe horizontal accuracy of the capture of the features linework, based on relative accuracy scale of the data capture, broadly if 1:50,000 = 25SELECT 1 FROM DUAL; 1:100,000 = 50SELECT 1 FROM DUAL; 1:250,000 = 125 or the known accuracy of the orthorectified image.
Veg.PEVegetationCAPTURESOURCE Long IntegerAll data is 25 (Veg: Pre-European Floristic Vegetation Mapping)
Veg.PEVegetationCAPTUREMETHOD short integerCode to describe method used to delineate feature, based on standard SDE domain. Trace - Registered Image (1) - mapping on screen from registered image, Trace - Ortho Image (2) - mapping on screen from orthorectified image, Table Digitisation (3) - mapping on to mylars using stereo or individual photos.
Veg.PEVegetationFEATURESOURCE short integerCode to describe the imagery used to delineate features, based on coded domain. Valid descriptions (codes) currently used are: True Colour - Ortho Rectified - Aerial Photography (1), Satellite - TM Imagery (25), True Colour - Hard Copy - Aerial Photography (2), Infra Red - Ortho Rectified - Aerial Photography (4), Black&White - Hard Copy - Aerial Photography (9), Satellite Imagery (10).
Veg.PEVegetationMINSCALE Long IntegerDescribes the scale at which the linework was captured from the imagery. For hard copy imagery this is the original scale of the image. For digital images this is the scale that was zoomed in to.
Veg.PEVegetationMAXSCALE Long IntegerDescribes the scale of the data used to obtain relative accuracy for the mapping, such as roads, drainage, contours of topographic data or the scale of the image.
Veg.PEVegetationCONDITION textThis code is not recorded for Pre-European Settlement vegetation mapping. All features in this layer will be recorded as "NULL".
Veg.PEVegetationCOMMENTS textComments field.

Contact Information

OrganisationDepartment for Environment and Water
Science Monitoring and Knowledge
Postal AddressGPO Box 1047

ADELAIDE
5001
EmailDEWNR.CustomerServiceCentre@sa.gov.au