Point cloud index BE_ELEV

BE_ELEV_ASPECT

Mean Aspect (aspect of ground a.s.l., based on DTM raster pixels bilinear regression)

unit: angle in rad (radian)

On DTM a bilinear regression model is calculated to get dx and dy (x- and y-slope) and then aspect by atan2.

BE_ELEV_ASPECT := atan2(dy, dx)

BE_ELEV_MEAN

Mean Elevation (mean of ground a.s.l., based on DTM raster pixels)

Mean of DTM-values.

BE_ELEV_SLOPE

Mean Slope (slope of ground a.s.l., based on DTM raster pixels bilinear regression)

unit: angle in rad (radian)

On DTM a bilinear regression model is calculated to get dx and dy (x- and y-slope) and then slope by arcus tangent of absolute value.

BE_ELEV_SLOPE := arctan( sqrt( dx² + dy² ) )