Land Monitor is a coordinated initiative set up by the National Dryland Salinity Program and supported by the CSIRO, Landgate, Department of Environment and Conservation, Department of Agriculture and Food Western Australia, Department of Water, Water Corporation, and the Department of Planning and Infrastructure. The project originally aimed to systematically monitor salt-affected land and remnant vegetation change over the agricultural area of south west of Western Australia.
Land Monitor I objectives were to:
Land Monitor II
In 2001, seven government agencies agrred to continue to acquire and process satellite imagery for Land Monitor II with the aim of providing annual mapping of remnant perennial woody vegetation in the agricultural area of south west western Australia. Land Monitor II purchased, rectified and calibrated Landsat TM (25 metre spatial resolution) summer imagery and then enhanced images to produce vegetation monitoring products, which included:
The following flowchart shows the structure of the project. More information about each component of the project can be found by scrolling down this page.
Mapping and monitoring salinity
Recent experience has suggested that both government agencies and landholders have grossly underestimated the extent of salt-affected land.
A subset of the Land Monitor salinity product. Cream represents agricultural land.
Predicting salinity risk areas
By combining Landsat scenes, digital elevation models (DEMs) and surface water accumulation models, areas at risk from future salinisation can be predicted. Accurate, high resolution contour data are required to produce accurate predictions of salinity risk. For this reason, Landgate will produce highly accurate 1-2m contours for the agricultural region.
Monitoring remnant vegetation and revegetation
Remnant vegetation can be monitored using summer Landsat TM imagery. Mapping and detecting trends in the extent and condition of both natural and revegetated areas have been field tested and proved accurate, within reasonable limits, by a pilot study in the Kent Catchment. Land Monitor has mapped changes in the extent and condition of remnant vegetation and revegetation since 1987.
A subset of the Land Monitor Perennial Vegetation Change 1990 to 2007 product.
Producing highly accurate digital elevation models
Landsat scenes purchased for the Land Monitor project from 1987 onwards are held in an archived collection. Each scene covers an area of approximately 186km x 186 km. Accurate, high resolution contour data are available for only a small proportion of the south-west. Land Monitor has produced high quality DEMs using automated techniques. Subsets of the Land Monitor DEM may be purchased for envionmental management purposes.
Land Monitor DEM extent overlaid with Landsat scenes.
Land Monitor DEM
Distributing the data to the communityThe Land Monitor Technical Officer can provide quotes for digital or hardcopy Land Monitor products. Land Monitor now has an online map service available to assist land management and research.
Establishing a baseline for continued monitoring
The Land Monitor project will:
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