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Service Description: <div style='&apos;text-align:Left;&apos;'><div><div><p><span>This dataset contains a satellite observed timeseries of the extent of irrigated summer crop areas in NSW from present day, back to 1987. </span></p><p><span>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><p><span>The presence of irrigated crops is derived from the application of the Normalised Difference Vegetation Index (NDVI), which quantifies vegetation density and health based upon the reflectance of red and near-infrared light in multispectral satellite imagery. </span></p><p><span>Expert opinion is then applied to qualify whether a field was irrigated, based on its greenness relative to the surrounding landscape throughout the summer season (December to April). The polygons are delineated in a semi-supervised manner and are accurate to the closest hectare. </span></p><p><span> </span></p><p><span>It should be noted images captured in December may reflect signs of water application representative of irrigated areas, but on account of limited visible greenness from emerging crops may not be included. </span></p></div></div></div>

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• Earth Observation - Summer Irrigated Crop Areas (Time Series) (0)

Description: This dataset contains a satellite observed timeseries of the extent of irrigated summer crop areas in NSW from present day, back to 1987. 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). The presence of irrigated crops is derived from the application of the Normalised Difference Vegetation Index (NDVI), which quantifies vegetation density and health based upon the reflectance of red and near-infrared light in multispectral satellite imagery. Expert opinion is then applied to qualify whether a field was irrigated, based on its greenness relative to the surrounding landscape throughout the summer season (December to April). The polygons are delineated in a semi-supervised manner and are accurate to the closest hectare. It should be noted images captured in December may reflect signs of water application representative of irrigated areas, but on account of limited visible greenness from emerging crops may not be included.

Service Item Id: ffa273c383a44b8ca4573702975b8072

Copyright Text: NSW Department of Climate Change, Energy, the Environment and Water

Spatial Reference: 4283  (4283)  LatestVCSWkid(0)


Initial Extent:

XMin: 149.41737462851376
YMin: -33.47627718135379
XMax: 149.54975292674857
YMax: -33.41277053309599
Spatial Reference: 4283  (4283)  LatestVCSWkid(0)

Full Extent:

XMin: 144.35266270300008
YMin: -36.54177486499998
XMax: 153.59803445700004
YMax: -28.37575116399995
Spatial Reference: 4283  (4283)  LatestVCSWkid(0)

Units: esriDecimalDegrees

Document Info:

Title: Earth Observation - Summer Irrigated Crop Areas
Author:
Comments: This dataset contains a satellite observed timeseries of the extent of irrigated summer crop areas in NSW from present day, back to 1987. 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). The presence of irrigated crops is derived from the application of the Normalised Difference Vegetation Index (NDVI), which quantifies vegetation density and health based upon the reflectance of red and near-infrared light in multispectral satellite imagery. Expert opinion is then applied to qualify whether a field was irrigated, based on its greenness relative to the surrounding landscape throughout the summer season (December to April). The polygons are delineated in a semi-supervised manner and are accurate to the closest hectare. It should be noted images captured in December may reflect signs of water application representative of irrigated areas, but on account of limited visible greenness from emerging crops may not be included.
Subject: This product provides a timeseries of earth observation derived (Landsat and Sentinel satellites) location and extent of NSW summer season irrigated crops, from 1987 to the present day updated on an ongoing basis for the selected catchments.
Category:
Keywords: Irrigated Crop Areas,DCCEEW Water,Earth Observation
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