Air Pollution Modelling with 3D Visualisation

UK-based environmental engineering company Cambridge Environmental Research Consultants (CERC) has been using the TatukGIS Developer Kernel (DK) ActiveX edition since 2007 to develop the GIS mapping module for its ADMS air pollution modelling software. The mapping module developed from the TatukGIS DK, called ADMS Mapper, is used to visualise and edit input data for the ADMS modelling software. The Mapper can render pollutant concentrations output from the ADMS model. Before ADMS Mapper became available, users of ADMS had to buy third-party GIS software such as ESRI ArcGIS or MapInfo to visualise their modelling scenarios. ADMS is used by hundreds of people... (read more)
2014-01-28 09:50:02

Modelling Prague Castle with a UAS

Capturing a Highly Secured Site from the Air
In a recent project to obtain detailed and accurate orthoimages and 3D models to support technical staff in maintaining Prague Castle in the Czech Republic, the site was captured by UAS photogrammetry. Videos and georeferenced panoramic images were also taken as a service to documentalists and to provide the basis for virtual tours for tourists. Prague Castle and its surroundings are heavily secured sites and special permission was required to conduct the air survey. Learn more about this unique project here. By Jakub Karas, Upvision, Czech Republic From the 9th century onwards Prague Castle, located on the banks of the River... (read more)
2016-04-25 04:31:17

OGC Supports European Data Modelling Workshop

The Open Geospatial Consortium will join EUROSDR, AGILE, JRC and ELF in presenting an important technical workshop focused on the geospatial elements of data models. The workshop will be held from 28 January (noon) to 30 January (noon) 2015 at the Danish Geodata Agency, Copenhagen, Denmark. National Mapping and Cadastral Agencies and other spatial data infrastructure (SDI) content providers are facing increasing demand for making well documented data in known data models available as standardised web-services. National e-government initiatives require spatial data to be modelled seamlessly with non-spatial data. INSPIRE puts requirements on GML application schemas and web service standards,... (read more)
2014-11-20 11:40:42

Investigation of 3D Modelling Techniques

3D Modelling and Web-based Visualisation of Cultural Heritage Objects
The rapid developments in the fields of photogrammetry, laser scanning, computer vision and robotics provide highly accurate 3D data. 3D models that can be created from such types of data are extremely effective and intuitive for present-day users who have stringent requirements and high expectations. Depending on the complexity of the objects for the specific case, various technological methods can be applied. Read on for a comparison of three technologies, based on real projects, including an assessment of their suitability for web-based visualisation of numerous objects of interest. 3D visualisation and proper documentation of cultural objects helps to preserve the history... (read more)
2017-01-26 12:50:38

3D Modelling from RGB Images

FOVEX Measure 3D is a combination of a super-fast high-resolution 360° panorama camera and innovative software that allows accurate measurement and CAD modelling directly within the images. FOVEX Measure 3D allows significant savings in field and office work, thereby increasing productivity. The technique is to be presented at Intergeo, taking place from 9 to 11 October 2012 in Hanover, Germany. After measuring an object in two images, its shape can be modelled by connecting points directly in the software. Therefore, the CAD model can be completed within the FOVEX software directly and the model as a whole can be exported... (read more)
2012-10-08 09:35:55

Modelling the Great Wall of China

Mapping by Airborne and Terrestrial Lidar
The Great Wall of China is one of the largest manmade wonders of the world, comprising many different and irregular structures. We employed airborne Lidar to produce highly accurate digital elevation models (DEMs) to identify areas requiring repair. A terrestrial laser scanner mounted on a tripod was used to improve the terrain model, especially for surfaces covered with dense vegetation. The combined use of airborne and terrestrial laser scanner produced DEMs with accuracies better than 10cm. The easternmost end of the Great Wall, Shanhaiguan Great Wall, is in the city of Qinhuangdao in Hebei. Although the wall is intact, the... (read more)
2009-02-27 12:00:00

Characterizing Activities in 3D City Modelling

The Quest for the Big Picture
3D city models have become common geospatial data assets for cities, and can be utilized for tasks including planning, visualization and decision-making. The field of 3D city modelling is diverse, with a multitude of technical solutions. Even the definition of what constitutes a 3D city model still remains ambiguous. Yet, surprisingly few studies have focused on reviewing the existing activities and assembling the big picture. This article presents some of the key findings from a recent study reviewing major 3D city modelling activities in Finland. 3D city models can be seen as an enabler in the smart city paradigm, operating... (read more)
2018-10-05 11:58:45

3D City Modelling of Istanbul

Issues, Challenges and Limitations
The Turkish city of Istanbul is developing a 3D city model mainly aimed at urban planning. The data sources used so far include airborne Lidar, aerial images and 2D maps containing footprints of buildings. Everybody engaged in creating 3D models of large cities faces many issues, challenges and limitations, including excessive data storage requirements, the need for manual editing, incompleteness and other data quality problems. In this article, the authors share their experiences on creating models of the city of Istanbul at the level of detail (LOD) 2 and 3. The core data for creating the 3D city model of... (read more)
2019-01-08 03:31:02

Colombian Company Adopts MWH Soft Geospatial Infrastructure Modelling Technology

MWH Soft (CO, USA) has announced that Empresas de Acueducto y Alcantarillado de Villavicencio ESP (Villavicencio), Colombia, has awarded the firm a substantial contract for its GIS-based H2OMAP Water and Sewer software suites plus its Platinum Subscription program. The programs, chosen following a competitive review, will be used to screen and evaluate cost-effective management strategies for Villavicencio's water distribution and sewer collection systems with an eye to best accommodating continued community growth. Serving a population of 310,430, the utility operates and maintains 400 kilometres of water mains and 350 kilometres of combined sewer mains. MWH Soft is a global provider... (read more)
2005-05-17 12:00:00

High-precision 3D Modelling of Historic Monument in Switzerland

Pix4D has created a highly accurate and very dense 3D model of Chillon Castle (Château de Chillon), Switzerland’s most visited historic monument. The 3D point cloud integrates the indoor and outdoor structures of this highly complex architectural object with a resolution of up to 5mm. It is based on both aerial and terrestrial images captured using DJI Phantom 2 Vision, GoPro Hero 3+, Canon 6D and Sony alpha 7r cameras with fisheye lenses. Chillon Castle is an island castle located on the shore of Lake Geneva, next to the city of Montreux. It is a highly interesting structure for photogrammetry... (read more)
2014-06-25 11:01:06
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