3dfier: automatic reconstruction of 3D city models

Three-dimensional city models are essential to assess the impact that environmental factors will have on citizens, because they are the input to several simulation and prediction software. Examples of such environmental factors are noise (Stoter et al., 2008), wind (Garcı́a-Sánchez et al., 2014), air pollution (Ujang et al., 2013), and...

Automated reconstruction of 3D input data for noise simulation.

Noise is one of the main problems in urban areas. To monitor and manage noise problems, governmental organisations at all levels are obliged to regularly carry out noise studies. The simulation of noise is an important part of these studies. Currently, different organisations collect their own 3D input data as required in noise simulation in a...

Generating, storing, updating and disseminating a countrywide 3D model

As in many countries, in The Netherlands governmental organisations are acquiring 3D city models to support their public tasks. However, this is still being done within individual organisation, resulting in differences in 3D city models within one country and sometimes covering the same area: i.e. differences in data structure, height...

3D-inputgegevens voor geluidssimulaties gegenereerd uit bestaande landsdekkende datasets

Geluid is een groot probleem in stedelijk gebied. Om geluidsoverlast te verminderen, voeren vele overheidsorganisaties op allerlei niveaus geluidstudies uit. Geluidssimulatie is hierin een belangrijk onderdeel. De reken methode voor de simulatie van geluid is in Nederland gestandaardiseerd. Maar de benodigde 3D-inputgegevens worden voor iedere...

Modelling urban noise in CityGML ADE: Case of the Netherlands

Road traffic and industrial noise has become a major source of discomfort and annoyance among the residents in urban areas. More than 44 % of the EU population is regularly exposed to road traffic noise levels over 55 dB, which is currently the maximum accepted value prescribed by the Environmental Noise Directive for road traffic...

3D BGT: waarom, wat en hoe?

Er zijn veel thema’s in de Omgevingswet die een 3D-component hebben. Er is dan ook een groeiende vraag om 3D geo-informatie in het DSO (Digitaal Stelsel Omgevingswet) te faciliteren. Een goede basis hiervoor is 3D BGT. IMGeo, het informatiemodel dat de inhoud van de Basisregistratie Grootschalige Topografie (BGT) vastlegt, is voorbereid op 3D en...

Standaarden voor 3D geo-informatie

Standaarden voor het beheer, de modellering, uitwisseling en ontsluiting van 3D informatie zijn essentieel bij 3D ontwikkelingen: standaarden voor 3D data bieden softwarebedrijven een solide basis voor investeringen. Bovendien maken 3D standaarden hergebruik van 3D data mogelijk.

Footprint decomposition combined with point cloud segmentation for producing valid 3D models

For the creation of three-dimensional (3D) city models, extrusion of building footprints is widely applied. Extrusion results in block shaped buildings. The main problem with these 3D models is that they do not represent height differences within a building. This thesis presents a method to improve building footprints by subdivision into parts...

Measure the climate, model the city

Modern large cities are characterized by a high building concentration, little aeration and lack of green spaces. Such characteristics create an urban climate which is different from the climate outside of cities. An example of an urban climate effect is the so-called Urban Heat Island: cities tend to be warmer than the surrounding rural areas....

Measure the climate, model the city

Modern large cities are characterized by a high building concentration, little aeration and lack of green spaces. Such characteristics create an urban climate which is different from the climate outside of cities. An example of an urban climate effect is the so-called Urban Heat Island: cities tend to be warmer than the surrounding rural areas....