id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
en-wikipedia-org-4152		Ground truth - Wikipedia			.html	text/html	1604	146	59	In remote sensing, "ground truth" refers to information collected on location. In the case of a classified image, it allows supervised classification to help determine the accuracy of the classification performed by the remote sensing software and therefore minimize errors in the classification such as errors of commission and errors of omission. It also involves taking geographic coordinates of the ground resolution cell with GPS technology and comparing those with the coordinates of the "pixel" being studied provided by the remote sensing software to understand and analyze the location errors and how it may affect a particular study. Additional ground truth sites allow the remote sensor to establish an error matrix which validates the accuracy of the classification method used. The process of ground truthing helps to ensure that the pixel is classified correctly and the error matrices are more accurate.	./cache/en-wikipedia-org-4152.html	./txt/en-wikipedia-org-4152.txt