Cross section
model for ICES
Fig.5 Cross section model for ICES
Data refinement
Before we filled the different model onto the
ICES permanent files, numerical data analysis,
correction and data compression were carried
out in TSO processing using subroutines of the
GPGS [3]. The programs written for visual in-
spection, are still under development to be
suitable for more complex interactive data ma-
nipulation in man-machine communication form
using graphic display like Tektronix or Vector
General, During the displaying and updating
phase, we have used successfully the HRD-1, an
ultra-high resolution film recording and dis-
play system installed at the Rijkswaterstaat’s
Meetkundige Dienst in Delft. The PDP 11/45
minicomputer-HRD configuration made it possib-
le to compile and edit data stored on several
data sets /fig. 4,5/, merging data from diffe-
rent sources Trig 6/ and lettering compiled
digital map. Corrections has been made intere
actively in refresh mode using the SOLADI soft-
ware package /released by the Laser-Scan Ltd,
Cambridge, England/. About the corrected pictu-
res we have obtained high-quality hard copies
on diazo film, The updated information was
transferred onto 9 track 800 bpi mag tape to
be saved for use as input data for later pro-
cessing by ICES,
Computer-aided design by ICES
The idea to define the ground model for river
Fig.6 Contours /string model/
version of ICES/ROADS, The purpose was the
same; simulating subcritical flow of water in
open-channel, where the existed/proposed bed
geometry is described at representative cross
sections upon which eg. longitudinal profile
computations can be made, The channel planning
along the band of interest was not executed
in a single run. The solution of the entire
problem was built up incrementally from a num-
ber of separate job to enable us to study
all the intermediate results making decisions
in the right time. All the relevant data rela-
ted to the problem were saved and if it was
needed restored on secondary storage during
the time of design activity. We have used
batch and TSO processing depending on the
kind of the computation, Fig. 7 shows this
man-machine configuration during the compu-
ter-aided channel design.
Because photogrammetry can not produce
underwater, subsurface and covered feature
data, we have generated sounding, boring
and additional field measurement data cre-
ating a multisurface model for the subsequent
computations, After that the terrain and sub-
surface data, the baseline, horizontal/ver-
tical alignment geometry, typical cross sec-
tion as far as the template change set has
been defined, the system was ready to exe-
cute the design of the channel, Implemented
the typical cross section into the ground
model at each station where terrain data
environment with the ICES/ROADS subsystem is not has been defined, the specific program has
a revolutionary new one Last year, Robinson
[11] introduced the RIVERS subsystem based on
the McDonnell Douglas Automation Company's
43
calculated the material volumes, setting-
out data etc. By modification of alignment
data and/or change of typical section, se-
