{ "name":"Water/Earth_Observation_Winter_Irrigated_Crop_Areas", "title":"Water/Earth_Observation_Winter_Irrigated_Crop_Areas", "type":"Map Service", "typeKeywords":["ArcGIS Server","Service","Map Service"], "description":"

This dataset contains a satellite observed timeseries of the extent of winter irrigated crop areas in NSW from present day, back to 1987. <\/span><\/p>

Observations have been derived from medium-resolution multi-spectral satellite imagery (30m/pixel Landsat with a 16 day return interval and 10 m/pixel Sentinel-2 with a 5 day return interval). <\/span><\/p>

The presence of irrigated crops is identified using established vegetation\u2011condition indicators commonly referenced in remote\u2011sensing literature to assess crop vigour and water\u2011stress patterns. Additionally, Earth observation-derived evapotranspiration datasets are incorporated to support the estimation of irrigated crop areas, improving the distinction between irrigated and non\u2011irrigated agricultural land. <\/span><\/p>

Expert opinion is then applied to qualify whether a field was irrigated, based on its greenness relative to the surrounding landscape throughout the winter season (May to October). The polygons are delineated in a semi-supervised manner and are accurate to the closest hectare.<\/span><\/p>

A metadata and data quality statement is available in the Documents section of the dataset homepage on the NSW SEED portal.<\/span><\/p><\/div><\/div><\/div><\/div>", "extent":[[151.5196069442063,154.88979059022213],[-30.30421901587182,-27.649123451918253]], "url":"https://spatialportalarcgis.dpie.nsw.gov.au/sarcgis/rest/services/Water/Earth_Observation_Winter_Irrigated_Crop_Areas/MapServer" }