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- W2182200028 abstract "The National Agricultural Statistics Service has been utilizing Resourcesat-1 (IRS-P6) AWiFS imagery for the past four growing seasons to derive crop specific classifications over intensive agricultural regions of the US. AWiFS, primarily because of its large 737 km swath width, has proven an ideal data source for such an application despite its relatively coarse 56 m ground sample resolution. Resourcesat-1 carries a second sensor, LISS-III, which collects data in tandem and utilizes an identical 4-band multi-spectral reflectance detector. However, LISS-III’s camera’s focal length provides a finer 23.5 m pixel resolution at the cost of a narrower swath width of 141 km. The purpose of this study was to quantitatively assess the impact that the different spatial resolutions have on land cover classification accuracy, especially targeted to agricultural cover types. To test the differences the USDA acquired clear sky, same path, same date LISS-III imagery in parallel with that of AWiFS collected over agricultural areas of the central US. Imagery dates are from the mid-summer peak of most crops’ phenologic cycle. Ground truth information derived from the Farm Service Agency reporting data was used for training and validation of the classifications. Quantitative accuracy assessment results are presented along with subjective findings and show that classifications derived from LISS-III data outperform the equivalent from AWiFS by several percent. The study further attempts to answer the scale question of what the ideal pixel size is for classifying agricultural cover types." @default.
- W2182200028 created "2016-06-24" @default.
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- W2182200028 date "2008-01-01" @default.
- W2182200028 modified "2023-09-26" @default.
- W2182200028 title "AN EVALUATION OF RESOURCESAT-1 LISS-III VERSUS AWIFS IMAGERY FOR IDENTIFYING CROPLANDS" @default.
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