Tallangatta Valley FRB photography

Potential Groundwater Dependent Ecosystems (GDE) are ecosystems identified within the landscape as likely to be at least partly dependent on groundwater. State-wide screening analysis was performed to identify locations of potential terrestrial GDEs, including wetland areas. The GDE mapping was developed utilising satellite remote sensing data, geological data and groundwater monitoring data in a GIS overlay model. Validation of the model through field assessment has not been performed. The method has been applied for all of Victoria and is the first step in identifying potential groundwater dependent ecosystems that may be threatened by activities such as drainage and groundwater pumping. The dataset specifically covers the Port Phillip and Westernport Catchment Management Authority (CMA) area. The method used in this research is based upon the characteristics of a potential GDE containing area as one that: 1. Has access to groundwater. By definition a GDE must have access to groundwater. For GDE occurrences associated with wetlands and river systems the water table will be at surface with a zone of capillary extension. In the case of terrestrial GDE's (outside of wetlands and river systems), these are dependent on the interaction between depth to water table and the rooting depth of the vegetation community. 2. Has summer (dry period) use of water. Due to the physics of root water uptake, GDEs will use groundwater when other sources are no longer available; this is generally in summer for the Victorian climate. The ability to use groundwater during dry periods creates a contrasting growth pattern with surrounding landscapes where growth has ceased. 3. Has consistent growth patterns, vegetation that uses water all year round will have perennial growth patterns. 4. Has growth patterns similar to verified GDEs. The current mapping does not indicate the degree of groundwater dependence, only locations in the landscape of potential groundwater dependent ecosystems. This dataset does not directly support interpretation of the amount of dependence or the amount of groundwater used by the regions highlighted within the maps. Further analysis and more detailed field based data collection are required to support this. The core data used in the modelling is largely circa 1995 to 2005. It is expected that the methodology used will over estimate the extent of terrestrial GDEs. There will be locations that appear from EvapoTranspiration (ET) data to fulfil the definition of a GDE (as defined by the mapping model) that may not be using groundwater. Two prominent examples are: 1. Riparian zones along sections of rivers and creeks that have deep water tables where the stream feeds the groundwater system and the riparian vegetation is able to access this water flow, as well as any bank storage contained in the valley alluvials. 2. Forested regions that are accessing large unsaturated regolith water stores. The terrestrial GDE layer polygons are classified based on the expected depth to groundwater (ie shallow <5 m or deep >5 m). Additional landscape attributes are also assigned to each mappnig polygon. In 2011-2012 a species tolerance model was developed by Arthur Rylah Institute, collaborating with DPI, to model landscapes with ability to support GDEs and to provide a relative measure of sensitivity of those ecosystems to changes in groundwater availability and quality. Rev 1 of the GDE mapping incorporates species tolerance model attributes for each potential GDE polygon and attributes for interpreted depth to groundwater. Separate datasets and associated metadata records have been created for GDE species tolerance.

GEDIS REFID: 29377; SOURCE MAP: G29377_geology_MtElizabeth_50k_200dpi_colour_repaired.tif; SUBJECT: SIMPSON, C.J., SIMS, J. & ORANSKAIA, A., 1996. Mt Elizabeth Area 1:50,000 geological map. Geological Survey of Victoria.

1950 Inverloch Liptrap Photography

GEDIS REFID: 107269; SOURCE MAP: G107269_goldfield_Creswick_31k_600dpi_colour_master.tif; SUBJECT: KRAUSE, F.M., 1981. Creswick Goldfield, geological map, showing the locations of quartz reefs, auriferous leads and shafts. Parish of Creswick 1:31,680 (40 chains:1 inch) geological map. Plan No 587/G/1 (reissue).

Loddon Mallee FRB photography

This LiDAR survey was undertaken as part of a larger DTV LiDAR capture project in operation between 2022 and 2024. The DTV LiDAR Project comprises of almost 60 separate LiDAR survey blocks totaling over 60,000 square kilometres within Victoria. The project was managed by the Coordinated Imagery Program on behalf of the Digital Twin Victoria (DTV) program, a four-year $37.4 million State Government investment designed to fast track the adoption of new geospatial data and emerging technologies. When completed, the LiDAR capture project will have achieved coverage of over 99 percent of the population and 95 per cent of the buildings in the Victoria. The primary use of the data is the creation of a ‘bare earth’ digital elevation model (DEM) that will underpin the DTV geospatial data platform. Numerous other important secondary uses will also benefit from the data collected such as river health monitoring, vegetation analysis and heritage cultural mapping.

GEDIS REFID: 29888; SOURCE MAP: G29888_geology_Willaura_100k_colour.tif; SUBJECT: BUCKLAND, G.L. & STUART-SMITH, P.G., 2000. Willaura 1:100,000 geological map. Australian Geological Survey Organisation.

GEDIS REFID: 11140; SOURCE MAP: G11140_quartersheet_6SW_31k_400dpi_colour.tif; SUBJECT: APLIN, C.D.H., Undated. Quarter Sheet 6 SW. Gisborne (Portions of the parishes of Gisborne, Macedon, Bullingarook and Kerrie) 1:31,680 (40 chains:1 inch) geological map. Geological Survey of Victoria.

The creation of untextured LOD2.2 feature objects over the City of Yarra Local Government Area (LGA). Bridges were also modelled at LOD2 and tunnel portals at LOD1 levels. Objects are intended to support general desktop survey purposes, including but not limited to: feasibility studies, visualisation of future stages of potential projects; extracting building heights and form, and modelling of other typical ground-based features that would be required in the early stages of transport and infrastructure planning.