Regional summary boundary shapefiles for the National Climate Risk Assessment

Full description

This dataset is a collection of regional boundary shapefiles, not elsewhere provided, used as spatial overlays to derive spatial summary statistics of various hazard, climate and other ecological raster data. The collection informed the assessment of freshwater and terrestrial natural environments as part of the National Climate Risk Assessment (NCRA). The shapefiles are derived from the intersection of publicly available 3rd party input data such as NCRA region boundaries, NCRA Hazard grids, Geofabric Level 2 Basins and Geofabric Network Streamlines.

The shapefiles (not elsewhere provided) in this collection include:
NCRA Regions x Aggregate Ecosystem Groups
5km NCRA Hazard cells intersecting Geofabric Perennial Streams x Geofabric Level Basin
5km NCRA Hazard cells intersecting Geofabric Non- Perennial Streams x Geofabric Level Basin

All layers are ESRI shapefiles in the GCS WGS 1984 (EPSG 4326)
Lineage: The input data used to derive the Regional Boundary shapefiles are:

1. NCRA Regions
2. A polygonised representation of NCRA Hazard raster data supplied by the Australian Climate Service (ACS)
3. Level 2 drainage basins from the Australian Hydrological Geospatial Fabric (AHGF) v3
4. Network Streams from the Australian Hydrological Geospatial Fabric (AHGF) v3
5. Aggregate Ecosystem Groups (AEGs) derived from National Vegetation Information System (NVIS) data

All processing was carried out using the Overlay Tools available in ArcGIS Desktop 10.8 with inputs reprojected to WGS84 before intersecting.

DERIVED Region Boundaries

1. NCRA Regions x Aggregate Ecosystem Groups:
NCRA Regions were combined with the polygonised AEGs using ArcGIS Intersect tool
output shapefile - NCRA_x_AEG_regions_WGS84.shp

2. 5km NCRA Hazard cells intersecting Geofabric Perennial Streams x Geofabric Level Basin:
Hazard cell polygons were selected based on their spatial intersection with Geofabric Network Streams where the Perennial attribute is "Perennial".
The selected cells were then combined with the Geofabric Level 2 Basins using ArcGIS Intersect tool.
output shapefile - Perennial_x_GeofabricLevel2Basins_WGS84_singleparts2.shp

3. 5km NCRA Hazard cells intersecting Geofabric Non-Perennial Streams x Geofabric Level Basin:
Hazard cell polygons were selected based on their spatial intersection with Geofabric Network Streams where the Perennial attribute is "Non Perennial".
The selected cells were then combined with the Geofabric Level 2 Basins using ArcGIS Intersect tool.
output shapefile - NonPerennial_x_GeofabricLevel2Basins_WGS84_singleparts2.shp