2.1 Units of volume 
The units of volume are the spatial base for capture and 
estimation of the environmental situation. They exist for 
the whole town area in digital form and are environmental 
assessed. They have a homogeneous structure which 
means that important features of use mark the type of 
different units of volume (e.g. agricultural fields, forest, 
park). 
  
  
  
  
  
  
  
  
  
  
  
Units of volume | Remarks | KVR 
Buildings 
W1 single house 010, 150, 271, 201 
W2 apartment 020, 150, 271, 291 
blocks 
Industry 
| | industries | 060, 150 
Transportation 
V1 main street 110, 140 
V2 parking 170 
  
  
  
  
  
Table 1: Part of the list of units of volume 
The units of volume are derived from the land use map of 
,Kommunalverbandes Ruhrgebiet" (KVR). From 47 
categories of use of the KVR with 138 sub categories a 
list with 34 units of volume has been developed (Table 1). 
2.2 Catalogue of criterion 
The second important feature is the catalogue of criterion. 
Each unit of volume has to be examined with regard to 
this catalogue. 
The criterion are assigned to the following 8 components: 
soil 
water 
air 
noise 
climate 
animals and plants 
recreation 
cultural possessions 
The base of information for each criterion is listed in the 
  
  
  
For each of this up to now 19 criterion main and 
supplementary parameters are defined, which operate as 
rules to qualify/quantify the criterion. 
2.3 Forms 
The criterion and rules are defined in forms which are the 
background for the transformation to the GIS. Besides the 
list of units of volume and the catalogue of criterion these 
forms define the main items for the creation of the map of 
environmental quality of Dortmund. 
The forms are subdivided into two levels: 
e description 
e rating 
The example shows the description and rating forms for 
the criterion ‘Formation of new ground water’. In the 
description level the measurements are divided into nine 
classes. 
  
  
  
  
  
Form Description 
IA 
Component Il Water 
Criterion A. Formation of new 
ground water 
new ground water/year 
  
Main parameter 
Supplementary parameter 
  
  
  
O 
D 
un 
o 
New ground water 
0 - 50 mm/year 
51 - 100 mm/year 
101 - 150 mm/year 
151 - 200 mm/year 
201 - 250 mm/year 
251 - 300 mm/year 
301 - 350 mm/year 
351 - 400 mm/year 
401 - 450 mm/year 1 
Table 3: Form; description level 
  
  
  
  
  
  
  
  
N [0 |Ó5|[O01|Oo|-1|0O9|CO 
  
  
  
  
  
In this example in the rating level the nine classes are 
now building five different grades. 
  
  
  
  
  
  
  
  
  
  
following table. For some criterion more than one base is Form Rating 
possible. TA 
Component Il Water 
Criterion Main Supplementary Base of Criterion A Formation of new ground 
parameter | parameter information water EM 
Soils Main parameter New ground water/year — | 
Soils feature | condition of soils map Supplementary parameter ré 
(Bodeneigen- | soils 1:25000 
schaften) New ground water Grade 
Soils concentra- | dangerous waste | map of Class 8 + 9 V 
contaminatio | tion of inor- | from the past dangerous Class 6 + 7 IV 
n ganic and waste from Class 4 + 5 Ill 
(Bodenkonta- | organic the past Class 2 + 3 Il 
mination) substances 1:20000 Class 1 | 
  
  
  
  
  
  
Table 2: Part of the catalogue of criterion 
  
  
  
  
  
  
  
  
Table 4: Form; rating level 
524 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B4. Vienna 1996 
  
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