MicroStation can only read PXYZ (point, easting, northing elevation (orthometric height)) files. You must first change your files to this format and save as *.csv.

Load in a vector (*.shp file) of control point locations. This can aid in determining accuracy issues.

Go to MicroStation–>Tools–>Toolboxes and select it.

Turn on XYZ Text


Next you will need to turn the PXYZ file into just XYZ by removing the point ID column. Save as a different name and make sure to replace commas with a space or microstation will give you a parse error and abort.

Make a new level in your project for each import file. Import all control point files. I’d recommend choosing all of your points and making them larger using the attributes menu.


Next Go to TerraScan-Tools-Output control report. Make sure that all of your LiDAR points are loaded.

Max variable slope of 6 degrees and expected variation of elevations of 15cm. This it to USGS base specification standards.

This report is created where Dz is average elevation error.Look through the report. Any points that are anamolous (outside of 3SD) will be red. Make sure that these points are not used as they will result in an unacceptable RMS. It is good practice to use profiles to prove that these points were anamolous if you have removed them from the statistical results.  Save this report using File –> save as text.

This will then be used to determine if the dataset meets standards of <25cm error for 95% of the data.