Land Monitor Salinity Extent for South West Western Australia 1998

Land Monitor Salinity Extent 1998 is a vectorized geodatabase mapping severely salt-affected land in the South West of Western Australia. The data was derived from 25-meter pixel raster analysis using satellite imagery, topographic data, and ground information, with post-processing to remove urban areas. The dataset was updated in 2022 using an improved spatial-temporal methodology.

Use Cases

• Analyze the spatial extent of severely salt-affected land from the 1998 vectorized mapping to monitor environmental degradation.
• Compare updated 2022 salinity class estimates with the 1998 baseline to identify expansions or reductions in severe salinity areas.
• Integrate the vector geodatabase with ancillary GIS datasets for regional land condition assessment and planning.

Strengths

• Based on a defined spatial-temporal methodology using satellite imagery, topographic data, and ground information.
• Data has been updated using improved computational resources and the latest available information.
• Post-processing has been applied to remove urban areas from the salt-affected land mapping.

Limitations

• The dataset focuses on the severe salinity class, potentially omitting less severe or emerging salt-affected areas.
• Changes detected may represent improvements in mapping accuracy rather than actual land condition changes.
• Original raster data converted to vector format may introduce generalization or boundary artifacts.

Provenance

Source

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

Collection Method

Mapping uses satellite imagery (Landsat TM), high-resolution topographic data, ground information, and ancillary GIS datasets.

Time Range

Primary mapping for 1998, with methodology updated in 2022.

Freshness

Methodology updated in 2022; dataset record last updated 2026-03-24.

Geography

South West of Western Australia.