Comparing the map and the lidar data

Here's a comparison of the current orienteering map and some laser scan (aka lidar) data of the same area. First, take a look at the current orienteering map with 5 meter contours.




I'm not sure of the source of the contours. I think it might be USGS "DEM" (I think DEM = digital elevation model).

Now, take a look at the laser scan contours. The countours are drawn at 2.5 meters (with a