. A primer on stand and forest inventory designs. Forests and forestry Mensuration; Forest surveys. Data from sampled, mapped stands can be extrapolated to unmeasured areas assuming stands do not vary widely within sampling stratum or map classes such as forest type, stand size, and density (Ek, Rose, and Gregersen 1984). As previously discussed, poststratification or pre- stratification can be used. Three sampling strata for the Enchanted Forest based upon apparent overstory vegetation type in each stand inter- preted from aerial photographs (see Appendix 2) are developed. The strata are coni
. A primer on stand and forest inventory designs. Forests and forestry Mensuration; Forest surveys. Data from sampled, mapped stands can be extrapolated to unmeasured areas assuming stands do not vary widely within sampling stratum or map classes such as forest type, stand size, and density (Ek, Rose, and Gregersen 1984). As previously discussed, poststratification or pre- stratification can be used. Three sampling strata for the Enchanted Forest based upon apparent overstory vegetation type in each stand inter- preted from aerial photographs (see Appendix 2) are developed. The strata are conifer vegetation, hardwood vegetation, and brush/open. Figure 28 shows the stands mapped by each stratum. A total of 6,240 acres have been mapped as conifer, 7,965 acres have been mapped as hardwoods, and 1,095 acres mapped as brush/open veg- etation type. Poststratification—Assume a grid of plots has been system- atically located as illustrated in figure 26. We can post- stratify by combining the grid and the mapping informa- tion, as illustrated in figure 29 and table 17. The mapped Forest Boundary. Figure 27—Mapping showing measured (*) and Forest average (a) volume (ccf) per acre based on sampling proportional to stand size. 62. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lund, H. Gyde; Thomas, Charles E. (Charles Eugene), 1940-; United States. Forest Service. [Washington, D. C. ?] : U. S. Dept. of Agriculture, Forest Service
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