Measures constituents of the Earth’s surface and atmosphere
5-20 m, aircraft is tasked
showed an uncertainty of 20 percent when automated techniques were compared with air photos (Table 3.1). These methods may be suitable for countries with appropriate technical expertise and software capabilities for automation.
Forest Degradation. Remote sensing techniques can be used to identify partial biomass removals over large areas, particularly biofuels harvest (Asner et al., 2005) and selective harvest of high-grade trees in the tropics. In northern forests, degradation from logging can be
FIGURE 3.1 Major land cover features for the coterminous United States, based on early to mid-1990s Landsat Thematic Mapper satellite data. SOURCE: Vogelmann et al. (2001). Reprinted with permission from the American Society for Photogrammetry and Remote Sensing.