The land cover area statistics are derived from the National Land Cover Dataset and are expressed in units of square miles. These figures are preliminary and based upon raw pixel counts and do not consider the effects of misclassification. On-going error analyses will result in future area statistics with attached confidence limits. The area shown for the 'Water' class excludes the oceans and Great Lakes. The state and coastal boundaries used to extract the area statistics were derived from the 1:100,000 Digital Line Graph map series. Note: the total area shown for any land cover class or state will be different than what you might find using the NLCD state files found on a CD or downloaded from the FTP site. This is because of the 10 pixel buffer added to the state files on the CDs and FTP site.