Vegetation Trend Analysis For Southwest Agricultural Zone 2011-2021

Vegetation Trend product provides statistical summaries of Landsat-based vegetation index changes over time. Landgate produced this multiband image file focusing on the southwest agricultural zone of Western Australia. It analyzes two time periods: 1990 to the current year and the last decade.

Use Cases

• Map linear trend over time to identify areas of consistent vegetation gain or loss in the southwest agricultural zone.
• Analyze residual standard deviation after fitting quadratic trends to detect non-linear vegetation stability patterns.
• Compare mean vegetation index values between the 1990-current and last-10-year periods to assess long-term shifts.
• Use standard deviation about mean layers to quantify inter-annual variability in vegetation density.

Strengths

• Provides analysis for two distinct time periods: 1990-current and the last 10 years.
• Derived from Land Monitor's Landsat-based vegetation index, a validated metric for vegetation density.
• Includes multiple statistical measures: mean, linear trend, quadratic trend, and standard deviations.

Limitations

• Geographic scope is limited to the southwest agricultural zone only, not statewide or national.
• Data format is primarily WMS and ArcGIS Map Service, requiring GIS software for direct analysis.
• Sample data and precise file sizes are unavailable, hindering pre-download assessment of data volume.

Provenance

Source

Landgate

Collection Method

Calculated from Landsat satellite imagery using the Land Monitor vegetation index (red band + short wave infrared band 1).

Time Range

1990 to current year, with a focus period of the last 10 years (e.g., 2011-2021).

Freshness

Updated to 2026-03 10, indicating recent maintenance.

Geography

Southwest agricultural zone of Western Australia.