Watershed Modelling in Kentucky

The recently completed Kentucky Watershed Modeling Information Portal (KWMIP), funded through a 750,000USD Co-operative Agreement with the US Environmental Protection Agency (EPA), is an innovative, standards-based data provisioning portal for watershed modellers in the Commonwealth of Kentucky, USA. The portal is integrated with the Kentucky Division of Geographic Information (DGI) web mapping services - KYGeonet (http://kygeonet.ky.gov), KYRaster and KYVector, served over state government LAN, and the US Geological Survey (USGS) StreamStats (http://streamstats.usgs.gov/html/idaho.html). It uses data from the Kentucky Climate Data Generator portals and the EPA’s Environmental Information Exchange Network (EIEN) and STORET (STOrage and RETrieval) repository for water-quality, biological and... (read more)
2006-11-20 12:00:00

Propagation Modelling Accuracy

Mentum and Intermap Technologies, USA, have entered into a collaboration for the delivery of a new generation of height-attributed land-use geodata that addresses the propagation modelling needs of the wireless industry. The telecom-grade product, Cityscapes HD, offers an unmatched level of X, Y and Z accuracy at a price point that enables network operators to manage the large geographical areas required by today's wireless networks. Cityscapes HD is offered at a native resolution of 15m and is available immediately in the USA, Western Europe and parts of Asia.   Cityscapes HD accurately includes the height of vegetation and man-made structures... (read more)
2011-12-13 09:51:25

Long Live Modelling!

An Assessment of the LADM from the Cadastre 2014 Perspective
The Land Administration Domain Model (LADM) makes a significant contribution to understanding the importance of data modelling in the domain of land, land administration and land management. The ‘Cadastre 2014’ vision of the International Federation of Surveyors (FIG) stated back in 1998: “Cadastral mapping will be dead! Long live modelling!”. While one might think that this message was clear enough, few professional colleagues took it seriously. The editorial team of the LADM were the first to undertake action to get to the bottom of this important issue. Now that the LADM has become an official ISO standard, that statement is... (read more)
2013-07-09 04:47:47

GIS for Hydrological Modelling

Gagetown Hydrologic Model
Estimating rainfall discharge is difficult in large catchment areas with varying topography. This leads to widespread inadequacy in culvert design, with resultant damage to these and other drainage infrastructure during storms, when water runoff is high. The authors developed three ArcGIS-based hydrological models which accurately estimate rainfall discharge for storms that occur anywhere between once every two weeks up to once a century, enabling improvements in culvert infrastructure design. The test results prove the potential for GIS to aid in the creation of highly accurate hydrological models. Although there have been hydrological models in existence for decades, we designed our... (read more)
2011-06-28 04:05:50

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

Detailed 3D Facade Modelling

A new solution from GTA (Germany) and Procedural offers more 3D detail in modelling of large databases of real-world building data. Special focus is set to add depth to the facade, as well as roof details. CityEngine imports 3D buildings generated automatically using GTA’s software solution Tridicon 3D, transfers detailed tridiconTM3D façade description to CityEngine building parameters and generates rich and visually pleasing procedural 3D buildings.     In addition to its highly efficient modelling tools, there is GTA’s 3D database with more than 175 European cities and 5.400 km² real-world building data available. Highlights are the 3D city model... (read more)
2011-04-11 12:00:00

3D Modelling of Fez

A Model from Aerial/Terrestrial Imagery and Topographic Maps
The ancient imperial city of Fez, Morocco, is an important tourist attraction and has been listed as a UNESCO World Heritage Site since 1981. The layout of the city is complex, which presents challenges in terms of 3D modelling. Here, the authors discuss a pilot aimed at creating a 3D model of Fez using topographic maps and aerial and terrestrial imagery. Overlapping 1:4,000 aerial images were used to create a digital surface model (DSM) and orthoimages. Orthoimages and topographic maps were used to manually delineate the footprints of buildings, roads, rivers and suchlike. Terrestrial imagery of single buildings from multiple... (read more)
2015-03-31 09:34:33

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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