To Import High Density Data
1. Click > 
Sample Data from File. The Import Raw dialog box opens.
Sample Data from File. The Import Raw dialog box opens.2. Click High Density.
3. Select a coordinate system. The Open dialog box opens.
4. Select a data file that you want to import. You can import a .igs (point-formatted), .ibl, .vda, or .pts file. The Raw Data dialog box opens.
5. Set the percentage of visible scan points by typing a value in the Visible Points Percent box.
6. Specify the direction for filtering raw data:
◦ Scan Curves—Filters out raw data along scan curves.
◦ Auto Direction Curves—Scan Tools determines an optimal direction and generates a set of curves from the original raw data.
◦ Sections—Intersects the point cloud with sections to create raw data sets.
7. If you selected Scan Curves, define point spacing and section spacing as follows:
◦ In the Curve Distance box, type a value for the distance between scan curves.
◦ In the Points Tolerance box, type a value for the distance between points.
8. If you selected Auto Direction Curves, define point spacing and section spacing as follows:
◦ In the Number of Sections box, type the number of sections to use to intersect a point cloud.
◦ In the Proximity Zone box, type a value for the width of the zone that goes along the length of a section. Scan Tools processes data points that lie within this zone to create scan curves. The proximity zone should not be more than half the distance between two adjacent curves.
◦ In the Points Tolerance box, type a value for the distance between points.
9. If you selected Sections, define the Section Type.
10. Define the Point/Section Spacing as follows:
◦ In the Proximity Zone box, type the width of the zone that goes along the length of a section. Scan Tools processes data points that lie within that zone to create scan curves.
◦ In the Points Tolerance box, type a value for the distance between points.
11. Click Preview or OK.