Geometric basis for planning and analysis
The preservation of historic buildings is a major challenge in the planning of sustainable infrastructures such as heat supply and mobile phone networks.
Listed buildings play a special role here: they make demands on the protection of the building fabric, but often have to be excluded or given special consideration in technical planning.
LoD2 data in combination with Nexiga solutions provide a precise basis for this and make it possible to identify historic buildings.
LoD2 (Level of Detail 2) data not only depicts the floor plans and structures of the buildings, but also their roof shapes and basic structures. In concrete terms, this means for residential buildings:
- Detailed 3D models for the analysis of roof structures (e.g. for radio masts, photovoltaic systems)
- Recording roof pitches and areas as a basis for heat demand analyses
- Identification of building types (e.g. apartment buildings, detached and semi-detached houses, old or new buildings)
In the case of listed buildings, LoD2 data provides important information as to which buildings are structurally sensitive and therefore not suitable for certain plans.
Visualization of 3D city models
Using the example of the 3D city model for the megacity of Cologne, our tool allows you to interactively explore historical buildings and their urban environment. Click here for the Scene Viewer.
Radio mast planning
LoD2 data for site analysis and exclusion of listed buildings
When planning radio masts (e.g. for 5G networks), listed buildings usually have to be excluded, as changes to the building fabric - such as antennas on roofs - can impair the historical value. LoD2 data helps here on several levels:
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Identification of suitable roofs of residential buildings for radio masts (flat roofs, sufficient surface area, load-bearing capacity)
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Exclusion of listed objects through combination with monument attributes from Nexiga databases
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Analysis of lines of sight and visual impact on the cityscape, especially in sensitive zones such as around churches or in old town districts
Heat planning
LoD2 data for building typing and protection of existing buildings
Municipal heating planning aims to efficiently connect existing and new buildings to sustainable heating networks. LoD2 data therefore makes this possible:
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Typification of residential buildings (roof areas , volume, number of storeys)
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Calculation of heat requirements at house level
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Visualization of potential routes for district heating pipes , taking into account listed buildings, which are often not allowed to be included in renovation or connection plans.
In the case of old buildings and listed facades in particular, energy-efficient refurbishment is often only possible to a limited extent. LoD2 data helps to identify these objects and exclude them from planning in order to avoid conflicts with the monument protection authorities.
Structural changes to facades: Restrictions for monuments/historically relevant buildings
Strict requirements often apply to the modernization of façades - such as thermal insulation, window replacement or roof renovations - for listed buildings. The following use cases are supported with LoD2 data:
- Delimitation of affected buildings in planning areas,
- Analysis of façade structures and roof shapes to identify sensitive building fabric,
- Simulation of structural interventions and their effects on the cityscape (e.g. through the integration of 3D renderings).
LoD2 data and Nexiga as a basis for planning
The combination of LoD2 3D data and Nexiga geoinformation systems makes it possible to precisely analyze residential buildings such as the one in Cologne and specifically exclude listed buildings - whether for radio mast planning, heat planning or structural changes to facades.
This makes technical planning more efficient and legally compliant, while at the same time ensuring the protection of historic buildings.
