cjdb: A Simple, Fast, and Lean Database Solution for the CityGML Data Model

When it comes to storing 3D city models in a database, the implementation of the CityGML data model can be quite demanding and often results in complicated schemas. As an example, 3DCityDB, a widely used solution, depends on a schema having 66 tables, mapping closely the CityGML architecture. In this paper, we propose an alternative (called ...

An Earthen Sill as a Measure to Mitigate Salt Intrusion in Estuaries

At a global scale, deltas are vital economic hubs, in part due to the combination of their access to inland regions via river systems with their proximity to sea. However, with the sea in close vicinity also comes the threat of freshwater contamination by saline seawater, especially during droughts. This study explores the potential of a...

Sensitivity of salt intrusion to estuary-scale changes: A systematic modelling study towards nature-based mitigation measures

Estuaries are among the most densely populated and heavily utilised regions in the world, where crucial functions – e.g., freshwater availability and water safety – strongly relate to the natural dynamics of the system. When developing nature-based solutions to safeguard these essential functions, a thorough understanding of estuarine...

Web Visualization of 3D Strata Objects based on CityJSON and LADM

Owing to population growth in Malaysia, there have been significant stratified subsurface and aboveground developments, particularly in densely populated areas, posing a challenge to the current land administration system and the urge to constantly improve. Land Administration Domain Model (LADM) provides a relatively generic spatial...

3D Modelling, Validation and Visualization of 3D Parcels in First Registration for 3D Cadastre - Indonesia Case

Developments of legal, institutional and technical aspects in realizing property registration of 3D parcels situated above and below 2D parcels are still evolving in many countries. 3D cadastres have to deal with various institutional/legal gaps and challenging information integration regarding the Rights-Restrictions-Responsibilities (3R) of 2D...

Are your indoorGML files valid?

IndoorGML datasets allow us to represent both (1) the geometry of the interior of a building, which is subdivided into <i>cells</i> (eg rooms, corridors, staircases); and (2) the navigation graph between these cells, which also acts as a mechanism to store the topological relationships between the cells. To be used in applications such as...

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...

A framework for assessing cadastral data as a source for 3D indoor modelling

This article focuses on 3D indoor modelling of buildings using cadastral data as an alternative way of indoor spatial data acquisition. Despite the rapid development of indoor spatial data acquisition technology, there are no existing solutions that would enable mass acquisition of indoor data. The main motivation for our research was the...

The ISPRS benchmark on indoor modelling

Automated generation of 3D indoor models from point cloud data has been a topic of intensive research in recent years. While results on various datasets have been reported in literature, a comparison of the performance of different methods has not been possible due to the lack of benchmark datasets and a common evaluation framework. The ISPRS...

Challenges in flying quadrotor unmanned aerial vehicle for 3D indoor reconstruction

Three-dimensional modelling plays a vital role in indoor 3D tracking, navigation, guidance and emergency evacuation. Reconstruction of indoor 3D models is still problematic, in part, because indoor spaces provide challenges less-documented than their outdoor counterparts. Challenges include obstacles curtailing image and point cloud capture,...

Mapping Geotechnical Risk for Infrastructural Works in Deltaic Areas

This paper presents method and first results of a study to quantify and communicate geotechnical risk for highway construction on soft soil and large building pits associated with infrastructural works in the Netherlands. A set of easy-to-read maps will inform the end users, geotechnical consultants at the Dutch Ministry of Infrastructure and...

Modeling aging of cementitious pore structure

Coupled reactive-transport processes in cementitious materials play a crucial role in the aging process pf building materials. Up to now, the effect of aging on microstructure and evolution of it’s properties, in three dimensions, was studied only by dissolution of certain phases at random locations. In this paper we present a new 3D reactive...

3D visualisation of underground pipelines: Best strategy for 3D scene creation

Underground pipelines pose numerous challenges to 3D visualization. Pipes and cables are conceptually simple and narrow objects with clearly defined shapes, spanned over large geographical areas and made of multiple segments. Pipes are usually maintained as linear objects in the databases. However, the visualization of lines in 3D is difficult...

Performing the Past and the Present for the Knowledge of the Future

The aim of this paper is to discuss the role three-dimensional models play in addressing performance issues in virtual reconstructions of the heritage buildings. Heritage visualisation is considered here as a process of representing knowledge about space, time, behaviour, light, and other elements that constitute cultural environments. The...

3D Modelling for Multipurpose Cadastre

Three-dimensional (3D) modelling of cadastral objects (such as legal spaces around buildings, around utility networks and other spaces) is one of the important aspects for a multipurpose cadastre (MPC). This paper describes the 3D modelling of the objects for MPC and its usage to the knowledge of 3D cadastre since more and more related agencies...

Data consistency checks for building a 3D model: A case study of Technical University, Delft Campus, The Netherlands

GIS is changing rapidly its face with the advancement of computing technologies. From merely a 2D representation of real world features, it is moving to present more and more applications in 3D formats. Today 3D GIS is an essential way of handling the spatial data in urban planning. In cities where every inch of land is measured and is consumed...

3D Buildings Modelling Based on a Combination of Techniques and Methodologies

Three dimensional architectural models are more and more important for a large number of applications. Specialists look for faster and more precise ways to generate them. This paper discusses methods to combine methodologies for handling data acquired from multiple sources: maps, terrestrial laser and additional measurements, together with...

Parametric Design in Protospace 1.1