This area represents well the typical forest cover types and topography of central Korea. Quercus spp. (Oak) and other deciduous tree species evenly dominated the entire area, as typically found in central Korea, with some planted coniferous stands of Pinus koraiensis (Korean pine), Larix leptolepis (Japanese larch) and Pinus rigida www.selleckchem.com/products/jq1.html (Pitch pine) distributed at relatively lower elevations. Elevation in the study area ranged from 74 to 560 m, while about 60% of the slopes were over 20 degrees, with aspects evenly distributed in all directions. The study area was selected between 127��39��54��E, 37��29��47��N and 127��41��26��E, 37��28��26��N, covering an area of 592 ha. The corresponding portion of the IKONOS image is shown in Figure 1.Figure 1.The study area with the pan-sharpened IKONOS image.

The image was acquired on 8th May, 2000, of an 11 km �� 11 km area in central Korea, and used to test various classification algorithms for mapping forest types. In general, the IKONOS image was composed of four spectral bands with 4 m spatial resolution and one panchromatic band with 1 m spatial Inhibitors,Modulators,Libraries resolution. A panchromatic band with 1m spatial resolution and four multispectral bands were fused through Intensity, Hue, and Saturation (IHS) transformation Inhibitors,Modulators,Libraries with a 4-3-2 band combination for RGB color. A fused pan-sharpened image was then used for classification.Segments, which are partial areas characterized into the same tree species, were used as the unit of the training dataset. Based on field visits and visual observations, 240 segments were selected as training areas.

The segment size ranged from 25 to 7,239 m2 according to the tree species and stand condition, with a mean of 702 m2. This large range of segment sizes was attributed to the fact that the stands were Inhibitors,Modulators,Libraries not spectrally homogeneous in the high spatial resolution image, even though they can be considered naturally homogeneous. In each classification Inhibitors,Modulators,Libraries class 409 test areas were randomly and independent selected. We performed visual interpretation of the image to identify potential accuracy assessment areas, and investigated each of these areas in the field.2.2. Methods2.2.1. Classification SchemeThe number and type of classes in a map are generally dependent on the information requirements and availability of certain ty
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