33. Istanbul 2004
shes are defined.
manner like the
ited as well as the
e only with one
ecially dams and
is recommended.
1 second iteration
sults in the forest
uenced.
r a sequence of
he file rascor.dat
ling as batch job.
F HANNOVER
'AL TERRAIN
NAME
grid.dat
VN
A daxyz.dat
NTS
williamstown-
DES (2)
(N) 2
' FILE
ONE LINE
oz
(E) E
N=NO
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B3. Istanbul 2004
6 FLAT (F), ROLLING (R)
OR MOUNTAINOUS (M) F/R/M R
7 NUMBER OF ITERATIONS 1/2 2
8 USE MODE CHANGE UP/DOWN Y/N Y
9 SMOOTHING AFTER FILTERING 0 =NO
FINAL FILTER - SIZE 0/3/5/7/9 0
11 OUTPUT FILE FOR LISA Y/N N
12 FURTHER HANDLING D = DIALOG
A=AUTOMATIC = NO FURTHER DIALOG D/A
PREDICTION YES/NO DY/DN/AY/AN AN
13 SIMPLE / ENHENCED FILE INPUT S/E S
FILE NAME = BLANK = NO CREATION OF FILE
TYPE CODE AND FILE NAME IN ONE LINE
DEFAULT = NEXT INPUT
Final results:
384523 OUTPUT POINTS ( 65.10 %) INCLUDING
SPECIAL POINTS
206165 POINTS NOT USED ( 34.90 %)
END OF PROGRAM RASCOR
Results of program Rascor without consider break
lines :
Final results:
301908 POINTS NOT USED ( 51.11 %)
Program RASCOR creates an image situ.raw with the location of
the remaining points. If a break line file will be used, situ.raw will
include an overlay of the break lines (gray value 0) and the
remaining points (gray value 120).
t
Za M e rx
Figure 8 file situ.raw — remaining points, without break lines,
ue. AS DR
cA I ks =
ET eR
id 7 PEE oer
iuo tr Be ORA dels
Figure 9 file situ.raw — remaining points, with break lines, 34,9076
of points removed
The break lines can be modified by operator .
The file wich contains the coordinates for the break lines can be
modified with a text editor.
The following example shows the structure of this file. Break lines
are coded with 0 and 1 values which represent the start and the
end of a break line.
# Design File Name = c\temp\**** dgn
# Feature Type = Break lines
ZINDEX HEADER X Y Z
26101 352073.824 331166.299 171.781
26101 351941.001 331016.496 168.652
added break lines start here.
30000 356751.300 319548.010
30011 356907.460 319552.770
30021 357891.270 318959.360
30160 361888.980 317491.460
30071 357141.700 319740.170
30081 358125.510 319037.440
The following images shows the influence of the added breaklines.
LUE T x
= =
Figure 10 Fewer points are removed 34,82%.
PROGRAM LISA
LISA-BASIC is a general DEM-program. Based on
random or equal distributed height points, supported by break and
form lines an equal distributed DEM can be created. Internally the
DEM is handled as an image with grey- instead of Z-values. This
has the advantage of a very fast computation of all derived
products like contour lines, wire frame models or 3-D-views.
An example of difference is marked with yellow.