High-Fidelity Roadway Modeling and Simulation

Roads are an essential feature in our daily lives. With the advances in computing technologies, 2D and 3D road models are employed in many applications, such as computer games and virtual environments. Traditional road models were generated by professional artists manually using modeling software tools such as Maya and 3ds Max. This approach requires both highly specialized and sophisticated skills and massive manual labor. Automatic road generation based on procedural modeling can create road models using specially designed computer algorithms or procedures, reducing the tedious manual editing needed for road modeling dramatically. But most existing procedural modeling methods for road generation put emphasis on the visual effects of the generated roads, not the geometrical and architectural fidelity. This limitation seriously restricts the applicability of the generated road models. To address this problem, this paper proposes a high-fidelity roadway generation method that takes into account road design principles practiced by civil engineering professionals, and as a result, the generated roads can support not only general applications such as games and simulations in which roads are used as 3D assets, but also demanding civil engineering applications, which requires accurate geometrical models of roads. The inputs to the proposed method include road specifications, civil engineering road design rules, terrain information, and surrounding environment. Then the proposed method generates in real time 3D roads that have both high visual and geometrical fidelities. This paper discusses in details the procedures that convert 2D roads specified in shape files into 3D roads and civil engineering road design principles. The proposed method can be used in many applications that have stringent requirements on high precision 3D models, such as driving simulations and road design prototyping. Preliminary results demonstrate the effectiveness of the proposed method

A time-line approach for the generation of simulated settlements

In this paper we present a model for procedurally generating virtual settlements populated with roads, land parcels and buildings. Our model improves on existing research by considering historical influence on settlement growth. To do this, an interactive time-line is used, allowing for a designer to specify a number of architectural periods. These architectural periods are then used in the generation process, giving the designer a robust tool to interactively generate photo-realistic urban scenes. Our results show that a variety of settlement types and sizes can be generated. In addition, we demonstrate that road patterns within real-world settlements can be created using our system

Evaluating procedural modelling for 3D models of informal settlements in urban design activities

Three-dimensional (3D) modelling and visualisation is one of the fastest growing application fields in geographic information science. 3D city models are being researched extensively for a variety of purposes and in various domains, including urban design, disaster management, education and computer gaming. These models typically depict urban business districts (downtown) or suburban residential areas. Despite informal settlements being a prevailing feature of many cities in developing countries, 3D models of informal settlements are virtually non-existent. 3D models of informal settlements could be useful in various ways, e.g. to gather information about the current environment in the informal settlements, to design upgrades, to communicate these and to educate inhabitants about environmental challenges. In this article, we described the development of a 3D model of the Slovo Park informal settlement in the City of Johannesburg Metropolitan Municipality, South Africa. Instead of using time-consuming traditional manual methods, we followed the procedural modelling technique. Visualisation characteristics of 3D models of informal settlements were described and the importance of each characteristic in urban design activities for informal settlement upgrades was assessed. Next, the visualisation characteristics of the Slovo Park model were evaluated. The results of the evaluation showed that the 3D model produced by the procedural modelling technique is suitable for urban design activities in informal settlements. The visualisation characteristics and their assessment are also useful as guidelines for developing 3D models of informal settlements. In future, we plan to empirically test the use of such 3D models in urban design projects in informal settlements.http://www.sajs.co.zaam201

Procedural generation of road networks for large virtual environments

Much work has been done in recent years involving the generation of virtual landscapes, namely for applications in video games and movies. Some recent video games feature worlds upwards of 400 mi2, and they continue to expand. Manual design of these landscapes can be extremely time consuming. However, recent approaches have shown that reasonable scenes could potentially be generated procedurally with little to no input from a human designer. Many of the individual pieces necessary for generating a large, complex terrain populated with cities have been investigated, but efforts to piece them together have been minimal so far. A system is presented to build a reasonable hierarchical road network when provided with positional and size information about cities as well as a map of the terrain. Experiments are included to compare this system to existing real world road networks in the United States

The implementation of a waste regulatory framework in the city of Johannesburg

A research report submitted to the Faculty of Commerce, Law and Management, University of the Witwatersrand in 50% fulfillment of the requirements for the degree of Master of Management (in the field of Public and Development Sector Monitoring and Evaluation) May 2017High volumes of illegally dumped waste and littering in the City of Johannesburg have legal, socio-economic and environmental implications and are also an indicator of ineffective waste regulatory framework implementation. Inadequate waste regulation enforcement suggests poor waste governance that impacts negatively on urban management. This research sought to identify the underlying reasons for this, drawing on data obtained from documents and interviews with representatives of the City of Johannesburg and members of the community. The findings revealed four broad themes that should be considered for effective implementation of the waste regulatory framework: the waste governance model, waste regulation measures, leadership in waste management, and public value for waste services. Factors that contributed to ineffective implementation included lack of leadership to drive waste policy and plans, waste governance characterised by poor relations amongst actors, lack of solidarity, lack of trust and reciprocity, lack of mutual support and shared sense of purpose, inadequate intellectual capital required for effective waste policy implementation, and limited power to mobilize both financial and tangible resources to fulfil the waste policy mandate and obligation. The high volume of illegally dumped waste throughout the City as well as high levels of littering reflect weaknesses in urban management and governance of the City. This discourages potential investors that are critically needed to promote growth, since the cleanliness of a City and the effectiveness of its solid waste management system are used as a proxy indicator of good governance.MT 201

Photorealistic visualisation of urban greening in a low-cost high- density housing settlement.

Thesis (M.Sc.)-University of KwaZulu-Natal, Pietermaritzburg, 2005.Apartheid housing policies of the pre-1994 South African government, and the low-cost highdensity housing programmes of the post-1994 government, has given rise to numerous urban environmental problems, some of which could be addressed in a cost-effective and sustainable manner through urban greening, while simultaneously promoting biodiversity. Public participation in the planning of urban greening has been identified as being of vital importance, without which urban greening projects run a high, and expensive, risk of failure. Previous studies indicate that the greening priorities of residents in low-cost high-density housing settlements may differ considerably from those of managers and experts tasked with the protection and extension of the natural environment resource base. A system of participatory decision support is therefore required to reconcile the greening requirements of the community, and the ecological benefits of biodiversity. If language, literacy, map literacy and numeracy difficulties are to be avoided, and a sense of place or belonging is to be invoked, such a participatory decision support system should, ideally, be visually based, and capable of generating realistic eye-level depictions of the urban landscape. New computer-based landscape visualisation applications, which can directly utilise GIS, CAD and DEM data to produce detailed photo-realistic viewsheds, were deemed better suited to the task of visualising urban greening than existing GIS based mapping systems, CAD and traditional landscape visualisation methods. This dissertation examines the process of constructing a 3D computer model of the Mount Royal low-cost high-density housing settlement, situated in the eThekwini Municipality, KwaZulu-Natal, South Africa. Visualisations including terrain, natural features, indigenous vegetation, houses and roads were produced and submitted, with a questionnaire, to experts from different disciplines, Mount Royal residents and neighbors. Results from the expert survey indicate moderate support for visualisation in professional decision-making. However, both experts and residents expressed strong support for the accuracy and credibility ofthe visualisations, as well as for their potential in a participatory decision support system

Automatic High-Fidelity 3D Road Network Modeling

Many computer applications such as racing games and driving simulations frequently make use of 3D high-fidelity road network models for a variety of purposes. However, there are very few existing methods for automatic generation of 3D realistic road networks, especially for those in the real world. On the other hand, vast road network GIS data have been collected in the past and used by a wide range of applications, such as navigation and evaluation. A method that can automatically produce 3D high-fidelity road network models from 2D real road GIS data will significantly reduce both the labor and time needed to generate these models, and greatly benefit numerous applications involving road networks. Based on a set of selected civil engineering rules for road design, this dissertation research addresses this problem with a novel approach which transforms existing road GIS data that contain only 2D road centerline information into 3D road network models. The proposed method consists of several components, mainly including road GIS data preprocessing, 3D centerline modeling and 3D geometry modeling. During road data preprocessing, topology of the road network is extracted from raw road data as a graph composed of road nodes and road links; road link information is simplified and classified. In the 3D centerline modeling part, the missing height information of the road centerline is inferred based on 2D road GIS data, intersections are extracted from road nodes and the whole road network is represented as road intersections and road segments in parametric forms. Finally, the 3D road centerline models are converted into various 3D road geometry models consisting of triangles and textures in the 3D geometry modeling phase. With this approach, basic road elements such as road segments, road intersections and traffic interchanges are generated automatically to compose sophisticated road networks. Results show that this approach provides a rapid and efficient 3D road modeling method for applications that have stringent requirements on high-fidelity road models

The Role of Geospatial Information and Effective Partnerships in the Implementation of the International Agenda for Sustainable Development

The former United Nations Secretary-General Ban Ki-Moon (2014), repeated the core promise in the 1986 UN Declaration on the Right to Development, in which the General Assembly called for an approach guaranteeing meaningful participation of everyone in development and the fair distribution of the benefits of that development. To this end, partnerships are central and can lead to the dignity of the citizens involved as they participate in the development of their own communities. This dissertation research conducted in Manyatta A and B in the Port City of Kisumu, Kenya sought to do just that. The purpose of this study is to demonstrate the role of participatory development planning and collaborative technology platforms of geographic information systems (GIS) and GeoDesign in strengthening sustainable development and enhancing of human dignity. The study used a multimethod design comprised of participatory action research, situational analysis, problem tree analysis, and stakeholder analysis approaches in partnership with the government, academia, business, civil society, and other stakeholders. The study shows how the newly formed government structure, post devolution, provides a functional framework to assist county and city governments to better determine and envision the future they want. This vision can be realized more rapidly through integrated planning to achieve poverty eradication and social, economic, and environmental sustainability, which are the three pillars of the 2030 Agenda for Sustainable Development. The citizens of informal settlements represent those who are farthest behind and who should be given priority. This study demonstrated the potential of inclusive and participatory development planning in restoring the dignity of those groups. This dissertation is available in open access at AURA: Antioch University Repository and Archive, http://aura.antioch.edu/, and OhioLINK ETD Center, https://etd.ohiolink.ed

Technical know-how in the indigenous knowledge system underlying Batammariba traditional architecture in Togo and Benin.

Ph. D. University of KwaZulu-Natal, Durban 2013.The desire to revitalise indigenous architecture and the built environment through socio-cultural, political and bio-physical relevance has created a strong need for the understanding of cultures and traditional built environments, especially in the developing countries. This study aims to fill the gap in understanding indigenous knowledge in relation to the production and maintenance of traditional architecture and settlements. This can be achieved by examining how such knowledge is depicted and communicated by the traditional master builder in the absence of written language; as well as exploring the forms, quantities and measurements, structural processes, thermal control and waterproofing systems used by the builders, and ecological resource management. The methodology used in this study emanates from the perspective of social anthropology. It includes informal interviews with local informants, participatory observation and reading, and interpreting written documentation of the Batammariba people and their indigenous knowledge systems. Information regarding prevailing technical know-how is obtained through investigations into readily observable facts and a comparative analysis of structure, context and style. It emphasises the importance of process rituals, building processes and technology, and an analysis of architecture in the context of both everyday use and special events. Findings of this study revealed that the works of Batammariba builders demonstrated structural stability, consistency in form, quantities and measurements, site layouts and resource choices in their traditional buildings and settlements. Furthermore the study substantiated the coding and sharing of such know-how in the absence of a written knowledge system. It therefore demonstrated that there is an unlimited reservoir of aesthetic, technical and conceptual wisdom locked up in the minds of traditional builders in Africa. The synthetic process so characteristic of the work of the great master builders of yesterday should be the answer to present day architectural problems. The present day generation of master builders all over Batammaribaland consists of a group of intelligent and active craftsmen, who are capable of adopting indigenous technology to modern needs if given an opportunity. The future generation of architects has much to learn from both past and present day traditional builders. The study also suggests a wide range of possible strategies to mainstream technical know-how of indigenous knowledge systems, as well as improve the way in which traditional indigenous architecture is synthesized in contemporary