3d) from the combined error, we obtain the elevation error, [gamma]-ray error and EM error, respectively.
Given the partial sill/sill of the three ancillary data, we expect to see large [gamma]-ray error, intermediate elevation error and small EM error for predicting soil [EC.
Despite this, Table 5 shows that of these three sources of ancillary data, the elevation error (0.
Furthermore, average elevation error was significantly higher in forested areas; Hodgson et al.
In practice, the first problem may be resolved by declaring that the higher-quality data set models are what is desired by the user, and that any discrepancy--whether due to difference in model or to measurable error--is conflated as elevation error.
While it is anticipated that land cover will play a role in SRTM elevation error (Heipke et al.
In addition, land cover was interpolated to the SRTM and NED point locations using proximal (nearest neighbor) interpolation, enabling an analysis into the relationship between elevation error and land-cover class.
Elevation error distributions were tested to determine whether their means are significantly different.
Average elevation error within each land cover class was calculated and tested for deviation from zero.
Three statistical tests were conducted on the relationships between SRTM elevation error and corresponding land cover.