Severe Salinity Extent Mapping for Southwestern Australia 2010

Land Monitor Salinity Extent 2010 provides vectorized mapping of severely salt-affected land in southwestern Western Australia. The dataset was created by the Department of Primary Industries and Regional Development using satellite imagery, topographic data, and ground information. It represents an update to prior 1990 and 1998 estimates, with changes likely within the severe salinity class.

Use Cases

• Analyze changes in severe salinity extent between 1998 and 2010 using the vectorized geodatabase.
• Integrate vector salinity data with ancillary GIS datasets for regional land condition assessment.
• Model the spatial distribution of salt-affected land after post-processing removal of urban areas.

Strengths

• Derived from a methodology using consecutive Landsat TM satellite scenes and high-resolution topographic data.
• Includes post-processing to remove urban areas from the vectorized salinity mapping.
• Represents an update to prior 1990 and 1998 salinity estimates using improved computational resources.

Limitations

• Spatial resolution originates from 25-meter raster pixels, limiting detail for fine-scale analysis.
• Changes detected are described as most likely within the severe salinity class, potentially omitting lesser severity changes.
• Data is specific to 2010, requiring combination with other sources for current temporal analysis.

Provenance

Source

Department of Primary Industries and Regional Development (DPIRD) Geographic Information Services.

Collection Method

Spatial-temporal methodology applied to satellite imagery, topographic data, ground information, and ancillary GIS datasets.

Time Range

2010.

Freshness

Metadata updated March 2026, but underlying observational data is from 2010.

Geography

South West of Western Australia.