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hi everybody welcome to video number 14 conditional statements and raster calculator in the last video I showed you how to collect spectral signatures from an avarice hyperspectral image of an oil spill in the Gulf of Mexico in the summer of 2010 and we extracted the signatures then we made some band ratio images and those images show areas of thick oil versus thin oil so what I want to do in this video is show you how to reclassify those raster images and so this is a technique called reclassifying so Im going to start out with a review of reclassifying and then Im going to show you how to do that in raster calculator using conditional statements and also using the and the ampersand sign ok so a quick review of reclassification were gonna have a raster that has a bunch of continuous values the high values correspond to thick oil the low values are gonna correspond to thin oil and we want to take that raster and we want to reclassify each pixel instead of having a value we want it