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These forms exist for each of the 19 criterion. To describe 
the environmental situation for each criterion a description 
and rating will be carried out with these rules. 
3 TECHNICAL TRANSFORMATION INTO A GIS 
3.1 The program UQUADO 
That under chapter 2 methodically developed concept for 
the environmental estimation should be implemented on a 
workstation computer under the Geographic Information 
System Arc/Info. The program to be developed should 
offer thereby possibilities, to update and complete the 
valid program version any time in case of new knowledge 
from the technical part as well as possible changes of 
existing legal basic conditions. In addition it should 
consist of an user-friendly graphical interface and give 
also users without Arc/Info knowledge the possibility, to 
work with the program. 
From these requirements the program UQUADO 
emerged, which has been programmed in the Macro 
Language AML (Arc Macro Language) under Arc/Info. 
The task of UQUADO is, to associate the units of volume 
to environmental qualities with the help of the algorithms 
from the forms and to visualise these so-called profiles of 
environmental quality, which can be given out 
subsequently on a printer or plotter. 
Arc/Info is a vector GIS and has to be chosen because it 
has powerful tools in the area of environmental questions. 
It has good opportunities of overlays and it is independent 
of the hardware. Different data bases can be used to 
store the thematic information (e.g. INFORMIX, 
ORACLE). There are tools for TIN (Triangulated irregular 
network), for network analysis and for grid operations, to 
revise raster images, which can be used as background 
information. 
Arc/Info has a powerful programming language (AML) so 
that it is possible to create automated processes, menus 
and forms masks. 
  
  
  
  
3.2 System requirements 
UQUADO has been developed on a SUN Sparcstation 2 
with 32 MB RAM under OpenWindows 3.0. Because of 
the large data a hard disk capacity not fewer than 1 
Gigabyte is to be recommended. Because of the 
tremendous drop-off in prices the standards change 
herewith however constantly. Computers with larger RAM 
are likewise now already on the market. 
Beside the usual hardware a digitizer of the size DIN A1 
should be available for the data entry, furthermore a 
Laser printer (postscript) for the output of the profiles of 
environmental quality. A CD ROM drive belongs 
nowadays already to the standard of a computer. A 
Streamer, Exabyte or DAT-drive for the data backup 
should not be missing. 
Since no system commands have been used, but all 
program parts consist only of AML-commands, an 
installation on other platforms is possible without further 
shift, which was already utilised in the practice, since the 
city of Dortmund uses IBM computers. 
3.3 Data preparation 
The land use map of the ,Kommunalverbandes 
Ruhrgebiet“ (KVR) serves as data base, from which the 
map of units of volume has been derived. All the other 
information (e.g. map of dangerous waste from the past, 
Soils map etc.) have been stored first of all in separate 
layers (Fig. 5). The important thing is here, whether it 
concerns of points, lines or area information, since points 
and areas can not be managed under Arc/Info in common 
layers. 
Subsequently the individual layers have been overlaid 
with the units of volume map. This has the advantage, 
that the information are directly available to the units of 
volume. In contrast it has the disadvantage, that at a 
change of the map of units of volume or of one layer the 
overlays have to be calculated again. Although for this 
operation AML-routines are available, the time element is 
not to be underestimated, meanwhile the System is not 
available to the user. 
Units of volume 
AREA PERIMETER DEUSEN-ID RE 
10433.22 13654.33 1 W1 
5004.34 8433.66 2 V2 
Soils 
AREA PERIMETER BODTYP 
50345.62 17544.44 L31 
2003.34 6500.55 G2 
Dangerous waste from the past 
AREA PERIMETER ALTLAST-ID ALTLAST 
8002.34 6654.33 1 A 
3050.64 1433.66 2 A 
Figure 5: Layers in UQUADO 
525 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B4. Vienna 1996