Towards 3D-Real Property Cadastre in Slovenia

The article presents the Slovenian land administration system focusing on the cadastral registration of buildings. We present the current structure of the land administration system and the latest upgrades introduced in 2018. In addition, we outline the main changes in the near future as a result of the new legislation adopted in April 2021 that...

Outer surface extraction for complex 3D building models

In recent years, 3D building models have become increasingly widespread and are intensively exploited in fields of computer graphics and geometry processing. One of the common surface representations of 3D building models is polygon mesh, which is both compact and efficient in terms of exchange format<br/>and data processing respectively....

A multi-height LoD1 model of all buildings in the Netherlands

The 3D representation of buildings with roof shapes (also called LoD2) is popular in the 3D city modelling domain since it provides a realistic view of 3D city models. However, for many application block models of buildings are sufficient or even more suitable. These so called LoD1 models can be reconstructed relatively easily from building...

Building segmentation from airborne vhr images using mask r-cnn

Up-to-date 3D building models are important for many applications. Airborne very high resolution (VHR) images often acquired annually give an opportunity to create an up-to-date 3D model. Building segmentation is often the first and utmost step. Convolutional neural networks (CNNs) draw lots of attention in interpreting VHR images as they can...

HSW: Heuristic Shrink-wrapping for automatically repairing solid-based CityGML LOD2 building models

The Level-of-Detail (LOD) 2 building models defined in CityGML are used widely in three-dimensional (3D) city applications. Many of these applications demand valid solid-based geometry (closed 2-manifold), which is crucial for analytical and computational purposes. However, this condition is often violated in practice because of the way LOD2...

Establishing a national 3D geo-data model for building data compliant to CityGML: Case of Turkey

This paper presents the generation of the 3D national building geo-data model of Turkey, which is compatible with the international OGC CityGML Encoding Standard. We prepare an ADE named CityGML-TRKBIS.BI that is produced by extending existing thematic modules of CityGML according to TRKBIS needs. All thematic data groups in TRKBIS geo-data...

Applications of 3D City Models: State of the Art Review

In the last decades, 3D city models appear to have been predominantly used for visualisation; however, today they are being increasingly employed in a number of domains and for a large range of tasks beyond visualisation. In this paper, we seek to understand and document the state of the art regarding the utilisation of 3D city models across...

Automatic generation of medium-detailed 3D models of buildings based on CAD data

We present the preliminary results of a work in progress which aims to obtain a software system able to automatically generate a set of diverse 3D building models with a medium level of detail, that is, more detailed that a mere parallelepiped, but not as detailed as a complete geometric representation of the building. Each building model is...

Data Modelling and Application of 3D Cadastre in Taiwan

Real estate follows a registration system in Taiwan. Property rights guarantee protection once registered. Currently land registration is enforced by the government; while constructional improvement registration is submitted on owner’s request. In the metropolitan areas, a majority of owners have applied improvement registrations in order to...

Repair and generalization of hand-made 3D building models

Many 3D GIS applications require 3D building models with different LoD (Level of Detail) that satisfy certain quality criteria. However, because of their complexity, most detailed 3D building models available are still produced manually, which results in inevitable geometric and topological errors. These errors hinder the downstream processing...