1. A land classification system operable for analysis of very high resolution (VHR) remotely-sensed multispectral Earth imagery, comprising: an image store containing image data corresponding to VHR remotely-sensed multispectral Earth images; at least one feature extraction module in operative communication with the image store, the feature extraction module being operable to produce feature data regarding at least a portion of image data; a feature stack comprising the image data and the feature data; a client interface operable to receive training data regarding one or more pixels of the image data from a user regarding a land class to which the one or more pixels belong, wherein the land class is selected from a plurality of pixel-level land classes; a classification compute module operable to generate a classification model at least in part based on a portion of the feature stack corresponding to the one or more pixels and the training data, wherein the classification model relates to classification of pixels of image data into one of the plurality of pixel-level land classes, wherein the classification compute module is operable to apply the classification model to the image data to classify each pixel of the image data into a respective one of the plurality of pixel-level land classes based on an analysis of the feature stack in relation to the classification model; and a post classification analysis module operable to reclassify at least one pixel of the image data, that has been classified by the classification compute module into a first pixel-level land class of the plurality of pixel-level land classes, into a second pixel-level land class of the plurality of pixel-level land classes different than the first pixel-level land class based on at least one post classification rule, wherein the post classification rule is not the same as the classification model and utilizes classification information regarding at least one other pixel to reclassify the at least one pixel from the first pixel-level land class into the second pixel-level land class.