The scale issue is an inherent part of eco-environmental informatics. From the early 1950s to the early1970s, many ecologists (Greig-Smith 1952; Gould 1966; Hutchinson 1971) tried to incorporate scale intoenvironmental biology. From the early 1970s to the 1980s, many ecologists focused increasing attention onthe problem of spatial scale (Allen and Starr 1982; Golley 1989; Gosz and Sharpe 1989; Wiens 1989). Inthe 1990s, the problem of scale becomes a central issue in ecology, for unifying population biology andecosystem science, and marrying basic ecology and applied ecology (Levin 1992). The explosion ofinterest in scale has created many methods for scale. For instance, the multiple-variables scaling methodsimultaneously examines each variable at different scales (Holling 1992). In the 1990s, spatially explicitmodels were developed to demonstrate scale-sensitive issues (Holt et al. 1995), and fractal geometry isnow used to treat the dependence of various phenomena on scales (Mandelbrot 1982). Resamplingtechniques are used to frame samples within a hierarchical framework to assess how scale affectsecosystem characteristics (Cressie 1993) and neural models are used to test scale effects resulting fromchanges in grain size and spatial structure (Milne 1992). The hierarchy theory is also employed to addressissues of spatial scale; this theory implies that an ecosystem is composed of interacting components and isitself a component of a larger system (O’Neill et al. 1989).