The construction of subdivisions and the maintenance of lawns may at times actually cause a decrease in stormwater volume and flow rate in comparison to a field of agricultural row crops. If ArcView only selects a portion of an area of a given color, you may want to use the seed tool again and click on an unselected portion of this color. Convert this to a shapefile and use the legend editor to create Unique values of different colors. The classification of Land Cover may be achieved using Spatial Analysis, the fundamental tool of Analytical Geography. Human features, such as roads and builings, are rather prominent in the landscape.
Water features are as well, and are apparrent on infared images.
From here, the other Land Cover types may be extrapolated. Irrigated crops are generally the brightest feature on infared images, followed by deciduous trees, conifers, and grasses. Short, upland grasses are similar to those found on lawns, and other generalized grass types may be distinguished through their relationship to the land use, such as wetlands versus agricultural areas, perhaps left fallow. Bare earth and buildings register low in infared refectance, and may be distinguished from one another based on their shape and proximity to roads and other human features. This distinction may be easily confused, as vehicles commonly wear away the vegetation in proximity to buildings.