Geoscience Reference
In-Depth Information
Fig. 1
The condominium
under study.
a
Bing photo.
b
3D geometric model
produced by Groupe VRSB
theoretical performance of each variable (Brewer et al.
1997
; Carpendale
2003
;
Wang et al.
2012
; Fosse et al.
2005
; Garlandini and Fabrikant
2009
; Halik
2012
)
and a maximum of seven 3D visual solutions per task.
The visual variables tested in these first experiments are color (hue) with and
without transparency, color (saturation), value with and without transparency and
texture with and without transparency. The transparency was tested in using vari-
ous levels of opacity (40 and 70 %). About enhancement techniques, moving and
adding elements were examined. For instance, adding annotation (official measure-
ments) and projected line and boundary were used and moving the floors in order
to detach them and add space between were tested. For each task, the apprecia-
tion of the typical black and white representation (boundary lines in black and vol-
umes in white) was also tested since this solution is frequently presented in the
literature and in practice. The final set of tested 3D visual solutions is comprised of
30 cadastral models representing the condominium. For efficiency purposes in the
context of representing a complex building with multiple floors, some 3D visual
solutions show only one floor, while others present many floors (depending on the
considered task). For each task, the following figures present at least two examples
of visual scenarios as tested during the interviews (Figs.
2
,
3
,
4
,
5
,
6
, and
7
).
