Global Positioning System Reference
In-Depth Information
Table 7.
Designation of RL.
Designation of RL
Symbol
-A_A->(Tree, species) = phytosanitaryStatus
l1
-A_M->(City, population, density, (int, surface(RS))) = density
l2
e-A_A->(City, √, interestPoints) = (Restaurant, typeRest, adressRest)
l3
e-A_A->(Hotel,
⊂
, park) = (GreenSpace, nameGS, typeGS)
l4
-A_A->(City, urbanArea) = mayor
l5
-A_A->(Country, population) = GNP
l6
-A_M->(City, urbanArea, percentUrban, (urbanArea, surface(RS))) =
percentUrban
l7
Table 8.
Example of formal context E.
l1
l2
l3
l4
l5
l6
l7
Social
0
true
0
0
0
true
0
Legal
0
0
0
0
true
0
0
Economic
0
0
0
0
0
0
true
Touristic
0
0
true
true
0
0
0
Agronomic
true
0
0
0
0
0
0
Social {l2, l6}
Legal {l5}
Economic {l7}
Agronomic {l1}
Touristic {l3, l4}
Fig. 9.
Instantiated lattice of concepts.
Determination of Relevant Links
We consider in this section that a user query is based on two components:
a temporal component (i.e., service time) and a semantic one.
About the temporal component, the user is invited to define the
acceptable level. (S)he can accept the standard data provided by WMS
and WFS services or can request for enhanced data. (S)he fi rst indicates
the maximum acceptable complexity to get these data (e.g., logarithmic,
linear, quadratic). The complexity is widely linked to the database structure
on which distant end users cannot interact. Her/His level of acceptation
depends on her/his center of interests and may vary during the spatial
analysis process. The temporal component is defi ned for each theme and
provides an Operational Lattice of Concepts. This lattice is a sub-set of an
Instantiated Lattice of Concepts and contains RL that are compatible with
the temporal complexity for this theme. In the event of a change during
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