Furthermore, this method has been proven to be more accurate. Errors in elevation do not affect the feature positioning since the operator plots at the vertical of the point. Researchers at CCRS have undertaken an exhaustive study to evaluate the geometric and radiometric parameters of the SAR system for mapping application. The strong backscatter caused by light standards in the highway medians also helps in their identification. This explains the lower omission result for S1-S7.
Some exceptions occur for the highways and the city streets.
The same reasons given previously for the omission errors apply for the statistical results.