Lehrveranstaltungsinhalt aus - Institute for Computer Graphics and ...

0.18. TELECOM APPLICATIONS OF CITY MODELS 23
Lets us summarize: the data-sets being used for this Telecom wave-propagation modeling in the
LMDS application consists first of all of vector data of the buildingsSlide 0.222 but also of the
vegetation, because the vegetation may block the intervisibility of antennas and, we show also
the combination of both. Of course the same data are needed in a raster format of the building
data, and finally a combination of raster and vector data to include the trees. And we must
not forget the addresses. Again, there may be one address per building, or multiple addresses for
each building. The addresses are locked to the geometric data address-locators that are placed
inside the polygons. As a result the addresses are associated with the polygons and thus with the
buildings.
What do such Telecom-data-sets go for in terms of price? A building may cost between $ 1 and $
25. A square km may go for $ 100 to $ 600. However, if there are 1000 buildings per sqkm then
obviously an individual building may cost less than one dollar. A metropolis such as Montreal
may cover 4000 square km but the interest is focussed on 800 sqkm. On average of course there
are less than 1000 buildings per sqkm. One might find more typically 200 or so buildings per sqkm
over larger metropolitan regions.
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