Geography Reference
In-Depth Information
Fig. 3 (a)(
Top
) Data model for web services in 2D. (b)(
Bottom
) From pollution field to 2D and
3D visualisation
The
2D Pollution grid
is the DPM with information related to the grid-threshold,
the altitude (Z0) and the time. A pollution episode is described by a set of 2D
Pollution grids.
The
view
describes the graphical rules to map the DPMs: the categorization
method to classify the values, the number of colours and the colour family (in Fig.
2
,
the family colour used is the
Yellow-Orange-Red
);
The
Polluted Areas
are computed from a
2D pollution grid
with graphic rules
described in a
view
. An area is described by its geometry ({(x, y}), its colour, a
range of values, a time and the pollutant.
