Geoscience Reference
In-Depth Information
of this representation, the horizontal reference is represented explicitly by the
attribute horizontalGeometryReference of type HorizontalGeometryReference (see
Sect. 3.2
, in particular Fig.
5
). Some combinations of values for lower and upper
vertical geometry reference and horizontal geometry reference for a LoD1 rep-
resentation are illustrated in Fig.
9
.
3.4 The Extended Profiles
Two extended profiles (Extended 2D and Extended 3D) are specified in addition to
the two base profiles, in order to accommodate for applications requiring a richer
set of attributes and more 3D feature types for components of buildings. Both are
not mandatory and hence, data has not to be provided by the member states.
The Extended 2D profile adds new feature types and attributes and relations to
Building and BuildingPart. A new feature type is BuildingUnit for decomposing a
Building (or BuildingPart) further into units which may be defined legally, for
example with regard to ownership. Civil engineering constructive works which are
not enclosed such as self-standing antennas are represented by the feature type
OtherConstruction.
Building and BuildingPart are enriched by further attributes giving more
detailed information on the topography (heightBelowGround, numberOfFloors-
BelowGround, floorDistribution, floorDescription, roofType), on materials of the
façade, of the roof, and of the structure, and energy-related attributes (connection
to electricity, to gas, to sewage, to water, energy performance, heating source,
heating system).
Official information such as the official area, the official value as well as the
address and the reference to the cadastral parcel of the building are represented in
addition.
The Extended 3D profile enriches the Extended 2D profile. It is very similar to
the building module of CityGML: boundary surfaces (Wall-, Roof-, Ground-,
Closure-, OuterCeiling-, and OuterFloorSurfaces) are represented semantically as
well as geometrically. Openings (doors and windows) also are also represented as
features. Furthermore, installations (dormers, balconies, …) and rooms are pro-
vided. The Extended 3D profile also offers textures, which are defined as simplified
version of CityGML textures. See Gröger et al. (
2012
) and Gröger and Plümer
(
2012
) for more details on CityGML.
4 Conclusions and Outlook
The INSPIRE initiative of the EU will significantly accelerate the process of
providing spatial data via Geo Web Services in the next years. Currently, the only
type of Geo Web Services which is commonly available is the Web Map Service
