- document
-
Thompson, R.J. (author), van Oosterom, P.J.M. (author)The prime purpose of Cadastral data – whether in the form of maps, survey plans or notes, or a digital database is the definitive demarcation of the extent of properties – and can be seen primarily as a decision support facility (“Can a structure be built here?”, “Where can I build a fence?”, “Should I buy this property”?). There are, however...journal article 2021
- document
-
Liu, H. (author), van Oosterom, P.J.M. (author), Mao, B. (author), Meijers, B.M. (author), Thompson, R. (author)Governments use flood maps for city planning and disaster management to protect people and assets. Flood risk mapping projects carried out for these purposes generate a huge amount of modelling results. Previously, data submitted are highly condensed products such as typical flood inundation maps and tables for loss analysis. Original...journal article 2021
- document
-
Balado Frías, J. (author), van Oosterom, P.J.M. (author), Díaz-Vilarino, L. (author), Arias, P. (author)Although point clouds are characterized as a type of unstructured data, timestamp attribute can structure point clouds into scanlines and shape them into a time signal. The present work studies the transformation of the street point cloud into a time signal based on the Z component for the semantic segmentation using Long Short-Term Memory ...journal article 2021
- document
-
Balado Frías, J. (author), van Oosterom, P.J.M. (author), Díaz-Vilarino, L. (author), Lorenzo, H. (author)Mathematical morphology is a technique recently applied directly for point cloud data. Its working principle is based on the removal and addition of points from an auxiliary point cloud that acts as a structuring element. However, in certain applications within a more complex process, these changes to the original data represent an...journal article 2021
- document
-
Liu, H. (author), Thompson, R.J. (author), van Oosterom, P.J.M. (author), Meijers, B.M. (author)Efficient spatial queries are frequently needed to extract useful information from massive nD point clouds. Most previous studies focus on developing solutions for orthogonal window queries, while rarely considering the polytope query. The latter query, which includes the widely adopted polygonal query in 2D, also plays a critical role in...journal article 2021
- document
-
Balado Frías, J. (author), Soilán, M. (author), Díaz-Vilarino, L. (author), van Oosterom, P.J.M. (author)Traffic signs are one of the most relevant road assets for driving, as the safety of drivers depends to a great extent on their correct location. In this paper two methods are compared for the segmentation of the sign and the pole supporting it. Both methods are based on the morphological opening to identify the sign points, the first one...journal article 2021
- document
-
Kalogianni, E. (author), Janečka, Karel (author), Kalantari, Mohsen (author), Dimopoulou, Efi (author), Bydłosz, Jarosław (author), Radulović, Aleksandra (author), Vučić, Nikola (author), Sladić, Dubravka (author), Govedarica, Miro (author), Lemmen, Christiaan (author), van Oosterom, P.J.M. (author)The growing recognition and influence of the ISO 19152:2012 Land Administration Domain Model (LADM), is revealed by the multiple country profiles that have been developed based on the standard in various jurisdictions across the world. The ongoing revision of the LADM Edition I, initiates discussions related to the development of country...journal article 2021
- document
-
Kara, A. (author), Çağdaş, Volkan (author), Isikdag, Umit (author), van Oosterom, P.J.M. (author), Lemmen, Christiaan (author), Stubkjaer, Erik (author)Spatial data in a Land Administration (LA) establish a fundamental geospatial data theme (see UN GGIM, 2018) and the integrated geospatial information framework for any Spatial Data Infrastructure (SDI). Domain-specific standards, an integral component of the SDI, play an essential role to represent the semantics of domains, specify links...journal article 2021
- document
-
Brouwer, Tim (author), Koeva, Mila (author), van Oosterom, P.J.M. (author), Theunisse, Iris (author)Snelle stedelijke groei, slimme energievoorziening, schonere mobiliteit en landrechten voor iedereen zijn uitdagingen die een innovatieve geomatics-aanpak vereisen. Sensortechnologieën, ruimtelijke gegevensverwerkingsmethoden en aanverwante benaderingen komen steeds meer en beter beschikbaar. De vraag is echter hoe ze te gebruiken en te...journal article 2020
- document
-
Liu, H. (author), van Oosterom, P.J.M. (author), Meijers, B.M. (author), Guan, Xuefeng (author), Verbree, E. (author), Horhammer, Mike (author)Space Filling Curve (SFC) mapping-based clustering and indexing works effectively for point clouds management and querying. It maps both points and queries into a one-dimensional SFC space so that B+- tree could be utilized. Based on the basic structure, this paper develops a generic HistSFC approach which utilizes a histogram tree recording...journal article 2020
- document
-
Lemmen, Christiaan (author), van Oosterom, P.J.M. (author), Kalogianni, E. (author)Eight years after its launch, many countries are using the Land Administration Domain Model to develop land administration systems. Christiaan Lemmen, Peter van Oosterom and Eftychia Kalogianni report on the implementations so far – as well as what to expect from the next version.journal article 2020
- document
-
Kara, A. (author), van Oosterom, P.J.M. (author), Çağdaş, Volkan (author), Işıkdağ, Ümit (author), Lemmen, Christiaan (author)Property valuation is a process that promotes sustainable development as it supports and forms several land management activities. Access to information on the legal, geometric, physical, locational and environmental characteristics of property units together with the economic indicators are required for an effective property valuation system...journal article 2020
- document
-
Indrajit, A. (author), van Loenen, B. (author), Ploeger, H.D. (author), van Oosterom, P.J.M. (author)Cities establish and maintain Land Administration Systems (LAS) to manage information about the land and urban space. Recognizing the importance of the urban space for sustainable development, information from spatial planning will affect land administration and vice versa. Therefore, every aspect that influences land use, both from spatial...journal article 2020
- document
-
Alattas, A.F.M. (author), van Oosterom, P.J.M. (author), Zlatanova, Sisi (author), Hoeneveld, D. (author), Verbree, E. (author)The users' movements in the indoor environments differ based on the condition of the environments. During an indoor emergency, an efficient evacuation is required to help the users to move to the safe areas. Many types of incidents could impact the movements of users and this requires studying the behavior of the people during the evacuation....journal article 2020
- document
- van Oosterom, P.J.M. (author), Bennett, Rohan (author), Koeva, Mila (author), Lemmen, Christiaan (author) journal article 2020
- document
-
Meijers, B.M. (author), van Oosterom, P.J.M. (author), Driel, Mattijs (author), Suba, R. (author)The Space-Scale Cube (SSC) model stores the result of a generalization process, that supports smooth scale transitions for map objects. The third dimension is used to describe geometrically the smooth transitions between objects at different levels of detail. Often-used map generalization operators fit in this SSC model. The 3D SSC model to...journal article 2020
- document
-
Balado, Jesús (author), van Oosterom, P.J.M. (author), Díaz-Vilarino, L. (author), Meijers, B.M. (author)Many of the point cloud processing techniques have their origin in image processing. But mathematical morphology, despite being one of the most used image processing techniques, has not yet been clearly adapted to point clouds. The aim of this work is to design the basic operations of mathematical morphology applicable to 3D point cloud data,...journal article 2020
- document
- Kalogianni, E. (author), Dimopoulou, Efi (author), Thompson, R.J. (author), Lemmen, Christiaan (author), Ying, Shen (author), van Oosterom, P.J.M. (author) journal article 2020
- document
-
Zhang, L. (author), van Oosterom, P.J.M. (author), Liu, H. (author)Point clouds have become one of the most popular sources of data in geospatial fields due to their availability and flexibility. However, because of the large amount of data and the limited resources of mobile devices, the use of point clouds in mobile Augmented Reality applications is still quite limited. Many current mobile AR applications...journal article 2020
- document
-
Liu, H. (author), van Oosterom, P.J.M. (author), Meijers, B.M. (author), Verbree, E. (author)Dramatically increasing collection of point clouds raises an essential demand for highly efficient data management. It can also facilitate modern applications such as robotics and virtual reality. Extensive studies have been performed on point data management and querying, but most of them concentrate on low dimensional spaces. High...journal article 2020