International Archives of the Photogrammetry, Remote Sensing 
hich objects are of interest for beach nourishments. 
determine w 
a multivariate visualization tool as 
For general purposes, 
| by this prototype is useful for decision makers to 
and Spatial Information Sciences 
understand the datase 
their analyses or predictions. 
. Vol XXXV, Part B4. Istanbul 2004 
t and to support the decision makers in 
  
proposec 
themunc map 
0.122688 
0.150582 
0.176476 
0.20637 
0.234264 
0.262159 
0.290053 
0.317947 
0.345841 
  
(1) Data set menu 
[1995 = 
relative.map 
gridded.map 
themunc.map 
attracc.map 
tempunc.map 
complete.map 
  
  
  
  
  
  
  
  
  
  
  
Pos Acc Hel m Pos, Acc Grid m Ther Acc CC 
100:00 100.00 1.00 ^ 
| 
  
Them Acc QAA Temp Acc IDC Comp. Data 
1.00 1.00 1.00 
  
0.01 9.01 0.01 
PCP menu 
  
‘compartment | 
pos acc rel 
pos acc-grid 
them acc CC 
them acc QAA 
them acc TDC 
comp. data 
  
  
  
  
  
  
  
(3) TOSM menu 
  
  
[1995 x! 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
1990 f 
1991 
1992 relative.map = 
1993| gridded.map ; 
IE themunc.map 
11995 attracc.map 
T9961 1 tempunc.map 
1997 | complete.map 
19981 FE LL + +++ — || Threshold 
1990| ISESELEDEES p ELE = 
000 | ETE TI Fier Lj] 0.25 
  
  
  
  
  
  
  
  
  
Figure 3: A prototype for multivariate visualization of qu 
display, showing the thematic uncertainty 
quality elements for every compartment. 
compartment or as a timeseri 
threshold value for an user-required quality. With 
visualization tool, it is essential that a user 
tives of the visual exploration and the 
atterns displayed. The 
For proper use of the 
understands the objec 
meaning of what is visible in the p 
visualization tool must be straightforward and uncomplicated in 
ort rather than obstruct understanding. Therefore, a 
eloped and introduced to 
and comments. Users’ 
order to supp 
working prototype needs to be dev 
several users for empirical assessment 
comments will be vital to determine whether the techniques are 
comprehensible, and also to determine the degree to which 
users may be able to benefit from visualization of quality 
ality elements for the beach nourishment proces 
of the compartments for 
In the PCP menu the user 
e. Section 3 is the temporal ordered sp 
a window slider the user 
s. Section | is the main 
1995. Section 2 is parallel coordinate plot, showing all 
can select to visualize all quality elements per 
ace matrix. In the TOSM menu, the user can enter à 
can select a specific observed dataset. 
d in order to refine design 
elements. These comments are neede 
ironment. 
requirements for a prototype visualization env 
Hence, the usability of the prototype will be tested by a group 
of target users. The users have a chance to try out the working 
formance with the 
of the prototype. Furthermore, the users' per 
prototype will be measured against predefined quantitative and 
outcome 
pecifications. Subsequently, the 
r the product is à Success 
bility information 
aluation process 
qualitative usability s 
of the usability test will show whethe 
or not. Faulkner (2000) states that usa 
gathered from this final stage of a usability ev 
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