Download USER MANUAL

PHOTOMOD 5.21
Buildings and vegetation filter is provided for DEM. The operation principle of the filter is as
follows. Base points with a given decimation ratio are computed for DEM. Filter is applied to
this set of points to remove the points, which fall onto the houses, trees, cars etc. At that,
random peaks are also filtered. As a result, there are only the points, describing the terrain.
Next, editing of the DEM is performed on the basis of the "relief" points, and the DEM is
saved in a new layer.
Use the DEM | Buildings and vegetation filter menu command to filter the buildings and
vegetation from DEM. The corresponding window opens.
Buildings and vegetation filtration from DEM
Since the filter is applied to the points, which computed from DEM, the detailed description of
the filter parameters, see chapter Filter of buildings and vegetation. In the case of DEM
filtering by default it is proposed the serial passage only the two stages of filtration: the basic
and additional filtration.
The thinout coefficient for finding the basic pickets from DEM is given in the Filter's
parameters and presets window.
© 2011
136