Geoscience Reference
In-Depth Information
Fig. 5 Illustrations for values of HorizontalGeometryReferenceValue (height level where 2D
geometry is measured) (INSPIRE TWG BU
2013
)
value 'agriculture'), Production/Industrial Facilities (INSPIRE TWG PF
2013
)
(for value 'industrial'), and Utility and Government Services (INSPIRE TWG US
2013
) (for value 'commerceAndServices'). Since there is no theme for residential
buildings in INSPIRE, only this part of the list is relatively detailed. A building
can be characterized by multiple usage values; the percentage of a value can be
represented explicitly (c.f. Fig.
3
).
In addition, the numbers of dwellings, of BuildingUnits (see
Sect. 3.4
) and of
floors above ground can be represented. The data type BuildingGeometry2D will
be described in the next section.
3.2 The Core 2D Profile
The Core 2D profile adds a geometrical description to Building and BuildingPart
(see Fig.
2
). The geometry is represented by the data type BuildingGeometry2D.
Note that the multiplicity of the geometry in a Building/BuildingPart is 0..*.
Hence,
a
Building/BuildingPart
may
be
represented
by
multiple
geometries
simultaneously.
Each of the geometries may be 2D or 2.5D. In 2D, a Building/BuildingPart may
be represented either by a point or by a polygon (optionally with holes, to
accommodate for atrium buildings, for example). For the representation of
geometry, the standard ISO 19125 'Simple Features' version 1.1 (ISO TC 211
2004
) is used.
A crucial point in 2D representations of objects which are 3D in reality is the
vertical reference where the 2D geometry is measured. This reference is explicitly
stored in an attribute of type HorizontalGeometryReference. Values are 'above
ground envelope', 'combined', 'entrance point', 'envelope', 'footprint', 'lower
