Modifying the Points per Refresh

The "Points per Refresh" number is the number of LIDAR points to retrieve and draw on the screen for each full refresh of the window. Larger numbers will decrease the refresh performance; however, the point density may provide an improved aesthetic display of the LIDAR data. Smaller numbers will greatly increase the refresh performance, however will not produce high point densities for display on the screen. A value from 200,000 to 300,000 points is a good number of points for both aesthetics and performance.

The "Points per Refresh" number is not the number of guaranteed points that will be drawn to the screen. Other factors such as the display filter and the scale of the extent or the map effect the number of points that are actually retrieved and drawn on the screen. The extent or map may be at a small scale (zoomed out) but a display filter set to "Bare Earth" for example can eliminate many points resulting in drawing less points to the screen than requested. Zooming in to large scales can also result in smaller numbers of points than requested because the point resolution is 100% or all of the raw points are being retrieved and drawn on the screen.

100,000 Points	300,000 Points

How to Modify the Points per Refresh

1. Open the 3D Window Properties , and select the "Performance" tab.

2.In the Points per Refresh text box, input a whole number greater than zero, and less than the "Maximum Point Cache Size" input and less than or equal to the "Maximum Points to TIN/Contour".