Properties Based Simplification of 2D Urban Area Map Object
For a long time, Geo-spatial information was printed on paper
maps whose contents were produced once for specific purposes
and scales. These maps are characterized by their portability,
good graphic quality, high image resolution and good placement
of their symbols and labels. These maps have been generated
manually by cartographers whose work was hard and fastidious.
Today, Computers are in use to generate the map as per
requirement called the cartographic generalization. The purpose
of cartographic generalization is to represent a particular
situation adapted to the needs of its users, with adequate
legibility of the real situation and its perceptional congruity with
the representation. Interesting are those situations which, to
some degree, vary from the real situation in nature. In this paper,
a simple approach is presented for the simplification of contour,
roads and building ground plans that are represented as 2D line,
square and polygon segments. As it is important to preserve the
overall characteristics of the buildings; the lines are
geometrically simplified with regard to geometric relations. It
also holds true for contour and road data. In this paper, an
appropriate transformation and visualization of contour and
building data is presented.
Keywords: Cartographic Generalization, GIS, Map, Object,
Simplification
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