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of cadastral data towards a possible 3D cadastral system have not been covered in
As elsewhere in the world, many examples can be identified in Portugal's
context where the 2D cadastre is limited. For instance, the work being currently
accomplished by Coimbra city council (CMC—“Câmara Municipal de Coimbra”)
can be placed amongst the initiatives undertaken by some state institutions as that
described in Sect. 3.2 . Preliminary discussions between the authors and some
CMC staff (particularly from its cadastre and land management office—“Gabinete
de Cadastro e Solos”, GCS), allowed the identification of some case studies. Six
of these case studies identified so far are presented in this section in order to dem-
onstrate the pertinence of a 3D cadastral modelling approach. They correspond to
different somewhat complex cadastral situations detected specifically in the city
of Coimbra, several instances of such cases, or similar ones, can be found though
across the country.
Before case studies are presented, we shall define in here the concept of some
cadastral spaces that are part of the Portuguese cadastral law. Therefore, for the
purposes of this study, “municipal domain” (corresponding in the Portuguese leg-
islation to “domínio privado municipal”) stands for state rights over a particular
real estate—land parcel or manmade infrastructure—owned by the local city/town
council whose jurisdiction covers the district territory where the given property
happens to be located; “public domain” (in the Portuguese legislation, “domínio
público”) stands for citizenship rights over the general public space—managed
though by a specific state agency, depending on each instance; “private domain”
(in the Portuguese legislation, “domínio privado particular”) stands for private
rights over a particular real estate—land parcel or manmade infrastructure—
owned by a single or any sort of corporate person.
3.3.1 Case Studies
Case study 1: “Dom Pedro V” Lift/Funicular
“Dom Pedro V” lift/funicular is constituent part of the public transport system
in the rather hilly city of Coimbra—west-centre of Portugal's mainland. Built in
2000 and operating since 2001, it is owned by the city council and is run by the
local transport municipal company, SMTUC. The whole infrastructure consists of
a 20 m vertical lift, a 24 m overpass, plus a 51 m sloping funicular connecting
“Dom Pedro V” market area, in Baixa (which stands for downtown in Portuguese),
to Alta (uppertown in Portuguese) where the historical and main campus of the
University of Coimbra is located.
As illustrated in Fig. 4 , the overpass in particular raises a clear example of a
3D issue in terms of cadastre. The whole infrastructure itself constitutes “munici-
pal domain”; both the vertical and funicular lie on municipal domain; however,
the overpass goes over public domain relating to the road underneath (in dashed
yellow lines).
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