1 After recovering files, you must reinstall or reset Windows 8/8.1, install drivers, apps and programs, and then copy your documents from the backup media you used earlier. 2  This is the hard way in case Windows 8, 8.1 or 10 does not start at all.ow comes the very important part for non-OEM Windows 8 and 8.1 users! Always leave the Keep Windows settings, personal files and applications option selected to perform a non-destructive reinstall of Windows 8 or 8.1.
Positional accuracy is the quantifiable value that represents the positional difference between two geospatial layers or between a geospatial layer and reality. An example of this is the comparison of the location of roads in a feature class versus their location in a TIFF image.f the feature class and the TIFF are using the same projection, you can assess the positional difference between the feature class and the TIFF. The Positional Accuracy Assessment tool (PAAT) allows you to compare two items to assess a data layer's accuracy in relation to a reference layer of known or unknown accuracy.
Horizontal Positional Accuracy Report: The horizontal accuracy of the DEM is expressed as an estimated RMSE (root mean square error). The estimate of the RMSE is based upon horizontal accuracy tests of the DEM source materials which are selected as equal to or less than intended horizontal RMSE error of the DEM.ertical Positional Accuracy Report: The vertical RMSE statistic is used to describe the vertical accuracy of a DEM, encompassing both random and systematic errors introduced during production of the data. The RMSE is encoded in element number 5 of record of the DEM.