I have received tif Laserscan images interpolated from Ascii data. I did not process the data so cannot say which processes or tools were used to interpolate the data. There are strange distortions on water surfaces which I cannot understand and seek an explanation.
Image 1 shows the Surface model. There are smooth elevations around vegetation. (Maybe due to the Spline interpolation technique?)
Image 2 shows the same areas but in the Terrain model. Here it seems the interpolation technique was different as the smoothing is missing.
Image 3 shows the las data.
Are the raised areas due to reflections of the trees on the water?
If so, why are reflections registered and not somehow eliminated?