Modelling Facade Geometry

Facade Recognition Using Mobile Laser Scanner Data
Due to the rapid changes of urbanisation, up-to-date, complex and realistic building models enriched with facade features are increasingly in demand in many countries. The Mobile Laser Scanning technique is progressively being used to capture objects in urban settings and it is becoming a leading source for modelling of facade geometry. This article describes an efficient and cost-effective method for automatically extracting and recognising building-facade features from a complex city environment using MLS point clouds. Mobile Laser Scanning (MLS) is a state-of-the-art technology for accurately and densely capturing the 3D geometry of various objects as 3D point clouds over large... (read more)
2013-10-28 02:03:48

Reality Modelling Goes Mainstream

At Bentley System’s annual conference for infrastructure thought leaders, CEO Greg Bentley presented a keynote speech. He stated that since Bentley Systems’ acquisition and assimilation of ContextCapture software in 2015, the proliferation of reality modelling across users’ projects – and across Bentley’s software portfolio – guarantees that it will become a mainstream contributor to infrastructure project delivery and asset performance. Reality modelling describes the potentially continuous capture of infrastructure assets’ as-operated conditions for processing into engineering-ready reality meshes, and their 'enlivening' for immersive interaction. To date, reality modeling has processed digital photos acquired from ground-level and/or aerial photography, and in particular from... (read more)
2016-11-02 10:16:39

Infrastructure Modelling Software

Autodesk's new Infrastructure Modelling software products facilitates users in utilities, telecommunications organisations and government agencies improve the design and management of their infrastructure. Autodesk's portfolio of products - including AutoCAD Map 3D 2010, AutoCAD Raster Design 2010, Autodesk MapGuide Enterprise 2010, and Autodesk Topobase 2010 - provide users with a solution for designing, visualising, simulating and analysing infrastructure assets and development plans.     In a recent live webcast, Jay Bhatt, Autodesk senior vice president for AEC Solutions, addressed technology's critical role in the design and management of infrastructure. Autodesk Infrastructure Modelling technologies facilitates aggregating multiple sources of data from... (read more)
2009-03-09 03:34:00

Automated Modelling of Tunnels

From Point Clouds to Cross-sectional Dimensions
Tunnels must be regularly monitored to meet safety requirements and to prevent excessive deformation or displacement. Tunnels are currently monitored by measuring a few benchmarks using total stations or other surveying instruments. These techniques are effective and precise, but also slow and expensive. In the case of rail tunnels, for example, the regular train schedule is disrupted whenever land surveyors have to operate inside the tunnel. This article presents a novel automated method for the geometric modelling of tunnels from mobile Lidar point clouds with sub-millimetre precision. The models can be employed for maintenance, project management and enhancement of future... (read more)
2017-08-17 10:06:13

Modelling Aids Brisbane Flood Crisis

AAM's 3D Flood Simulation of Brisbane, Australia, was used extensively by Australian and Global media during the recent flood crisis in Brisbane. The flood level simulations were produced interactively in 3D. This was a very effective way of communicating the impact of the flood on buildings and infrastructure and it provided a valuable tool in assessing the potential risk for the city in the days leading up to and during the flood peak.   The videos supplied residents, business owners and the public with realistic representations of the predicted flood event.   The flood simulation was based on accurate geospatial... (read more)
2011-01-18 09:14:34

Hurricane Devastation Mapping and Modelling

I-SiTE Studio software, a product of Maptek Pty (Australia), was recently used by a team of engineers and researchers sponsored by the US National Science Foundation to map structural and geotechnical damage to levees and waterways in New Orleans, caused by Hurricane Katrina in August 2005. Scanning was carried out on 10 different sites where levees had failed, and highly detailed 3D models were generated to assist with analysis and reconstruction. More than 180 scans were recorded over 5 days. The objective of the laser scanning was to obtain precise measurements of the ground surface to map soil displacements at... (read more)
2005-11-16 12:00:00

3D Modelling of Castles

Integrating Techniques for Detail and Photo-realism
Three-dimensional documentation of heritage buildings is important for conservation, restoration and education. When it comes to complex architectural structures such as castles, no single modelling technique is capable of yielding cost-effective, highly detailed and accurate photo-realism. The authors demonstrate how integration of multiple techniques brings resolution.<P> Castles are unique and fascinating structures of complex architecture the style of which has evolved over centuries. Three-dimensional modelling aims at capturing all geometrical detail, both exterior and interior, and representing these features with high-resolution triangular meshes for accurate documentation and photo-realistic visualisation. Modelling complex and large-scale architecture requires the integration of multiple techniques,... (read more)
2008-02-19 12:00:00

Data Modelling for Water Management

UML for Better Communication among Stakeholders
In 2004 the government agency responsible for water management in The Netherlands began a project to create an integrated geo-database for holding all geo-information on water-related objects. The set-up of the geo-database had to be sufficiently flexible for use at different management levels and geo-data had to be accessible using Web services. UML has played an important role in the project: it helps discussions, forcing designers and end-users to be specific. Because of its geographic location in a low-lying delta, water management is of prime import-ance for The Netherlands. Rijkswaterstaat (RWS), the Directorate-General for Public Works and Water Management, is... (read more)
2006-05-22 12:00:00

UML in Use Case Modelling

Property Transactions in Slovenia
Modelling is a well-proven and widely accepted engineering technique for controlling complex reality. Unified Modeling Language (UML) is a general-purpose aid for graphical modelling. The author presents a use case driven approach for real-estate transaction in Slovenia. Short Introduction to UML By Mathias Lemmens, editor, GIM International When one wants to convert a process (dynamic system) taking place within a certain domain - such as registration of a transfer act in a land administration system - into a software system, one may approach the process from several directions. UML (Unified Modeling Language) has been developed to describe the different views... (read more)
2005-10-27 12:00:00

Reducing 3D Modelling Time

A new product in the AVEVA Plant portfolio is AVEVA Laser Modeller, a 3D laser scanning software solution that can reduce by up to 50% the time for intelligent 3D modelling of brownfield facilities. Over the past 12 months, key customers have played a role in the development and testing process of this new product. The application facilitates traditional costly techniques for converting laser scan data into an intelligent 3D model to become obsolete, according to Bruce Douglas, senior VP Marketing & Product Strategy of AVEVA. He continues saying that AVEVA Laser Modeller changes the fundamental ground rules by adding... (read more)
2012-04-16 01:55:59
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