About the Geofabric

The enduring nature of the Geofabric is based on a set of contracted nodes (points) which represent important hydrological features in the landscape.

These points have a permanent identifier included in all versions of the Geofabric, and provide a persistent framework through space and time.

A subset of the contracted nodes is used to create a simplified node-link network with associated contracted catchments.

Our Information Sheet offers an overview of the Geofabric.(312Kb).

Phase 2 is available as a National dataset based on 1:250,000 scale mapped features and the 9 second digital elevation model (DEM) and comprises the following 6 products:

  1. Geofabric Surface Cartography
    Cartographic representation of surface hydrological features

  2. Geofabric Surface Network
    Network representation of hydrological features

  3. Geofabric Surface Catchments
    Catchment boundaries derived from the 9 second Digital Elevation Model

  4. Geofabric Groundwater Cartography
    Cartographic representation of groundwater hydrology features

  5. Geofabric Hydrology Reporting Catchments
    Contracted nodes, contracted catchments and node-link network

  6. Geofabric Hydrology Reporting Regions
    Reporting regions based on aggregations of contracted catchments.

Phase 3 data is now being iteratively released and is based on improved scales of mapped features and the nationwide 1 second (30m resolution) Digital Elevation Model.

A National V3.0.5 Geofabric Surface Network Beta product was released in January 2019, which includes over 2.5 million stream segments, 7 million catchments and 5000 monitoring points, and supports use with the Geofabric Toolset. A supporting drainage division layer is also available.

Two further National Phase 3 releases are planned, to realise a full suite of 6 Phase 3 Geofabric products in 2020.

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