3,063 research outputs found

    Trends and concerns in digital cartography

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    CISRG discussion paper ;

    Land information systems : an overview and outline of software requirements

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    This thesis looks at some aspects of land information systems. The introduction gives the rationale for this study, and the second chapter outlines the development of land information systems with particular reference to the cadastre. In the third chapter the software requirements for the development of land information systems are considered. Programming language and databases are discussed. The fouth chapter deals with the organisation and hardware needed for a land information system. Finally, in the fifth chapter some of the algorithms used in land information systems are presented. Four appendices cover the programmes which were developed in the course of this study, the software specification for an operational system, an example of LIS-related data in a large organisation, and the syntax of Modula-2, the programming language used for the examples

    The Design and Implementation of a Prototype Geographic Information System Using a Novel Architecture Based on PS-Algol

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    This thesis is concerned with the design and implementation of a novel architecture for a geographic information system based on the use of a new database language called PS-algol, in conjunction with a hybrid database structure. The main aspects discussed within the context of this thesis are:- i) the definition of a database; ii) the components and functions of a database management system; iii) the features of PS-algol; iv) the new system architecture; v) the use of operational management system; vi) data entry as carried out by the system; vii) the facility for the cartographic representation of features; viii) data retrieval and its potential use; and ix) the generation of hard-copy output The thesis also includes a review of existing geographical information systems against which the novelty of the new approach can be judged

    Participatory mapping in the design process of a spatial data infrastructure SDI: a case study in the Biosphere Reserve Rio Platano (Honduras)

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    Dissertation submitted in partial fulfillment of the requirements for the Degree of Master of Science in Geospatial Technologies.In the recent years, the major production of cartographic information and the advancement of new Information Technologies (IT's) has brought with it the need to develop new storage and management tools, making access in a simpler way either alphanumeric or vector information. Since the 60s, the processing, analysis and visualization of cartographic data has been carried out using GIS as desktop software, installed on a single computer. The advantage of this system was the possibility of combining different cartographic information thereby facilitating decision-making. The need to share data, mainly cartographic information, between agents who are working in the same area has been the basis for the creation of Spatial Data Infrastructures (SDI) at global, national, regional ,local, or corporative level. Several resources for managing, classifying, sharing, exchanging, combining and accessing geographic data through internet connection have been developed together with the implementation of all levels of SDI's. The resources can be classified as: software for publishing cartographic data (maps servers), publication standards, metadata, legal framework, agreements among organizations, and the possibility to create different user levels.Therefore, the aim will be to have cartographic information updated and available for all the involved agents who are working in the same territory, which will result in sharing efforts and costs. Nevertheless, the development of new technologies has had an effect where the cartographic data producers have less direct contact with the field, ignoring somehow the people living in it who are the ones with best knowledge of the territory. In remote areas, where it is difficult to access such as the Rio Platano Biosphere Reserve Region (Honduras), it is indispensable to create an SDI for managing and sharing cartographic information by the involved agents in the territory. It is important that the information offered by the indigenous communities is not left aside because they have a direct relation with the field. In the case of Rio Platano, they are scattered along the territory. The basis of this thesis is to create the SDI for the Rio Platano region and the methodology to combine the different cartographic information published by different organisms. Also, it will be important to include in the SDI structure the information regarding the cadastral boundaries and socio environmental indicators obtained from the indigenous communities. It will require the design of participative pictograms using Participatory Mapping techniques

    Exploratory visualization of temporal geospatial data using animation

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    Visual communication in urban planning and urban design

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    This report documents the current status of visual communication in urban design and planning. Visual communication is examined through discussion of standalone and network media, specifically concentrating on visualisation on the World Wide Web(WWW).Firstly, we examine the use of Solid and Geometric Modelling for visualising urban planning and urban design. This report documents and compares examples of the use of Virtual Reality Modelling Language (VRML) and proprietary WWW based Virtual Reality modelling software. Examples include the modelling of Bath and Glasgow using both VRML 1.0 and 2.0. A review is carried out on the use of Virtual Worldsand their role in visualising urban form within multi-user environments. The use of Virtual Worlds is developed into a case study of the possibilities and limitations of Virtual Internet Design Arenas (ViDAs), an initiative undertaken at the Centre for Advanced Spatial Analysis, University College London. The use of Virtual Worlds and their development towards ViDAs is seen as one of the most important developments in visual communication for urban planning and urban design since the development plan.Secondly, photorealistic media in the process of communicating plans is examined.The process of creating photorealistic media is documented, examples of the Virtual Streetscape and Wired Whitehall Virtual Urban Interface System are provided. The conclusion is drawn that although the use of photo-realistic media on the WWW provides a way to visually communicate planning information, its use is limited. The merging of photorealistic media and solid geometric modelling is reviewed in the creation of Augmented Reality. Augmented Reality is seen to provide an important step forward in the ability to quickly and easily visualise urban planning and urban design information.Thirdly, the role of visual communication of planning data through GIS is examined interms of desktop, three dimensional and Internet based GIS systems. The evolution to Internet GIS is seen as a critical component in the development of virtual cities which will allow urban planners and urban designers to visualise and model the complexity of the built environment in networked virtual reality.Finally a viewpoint is put forward of the Virtual City, linking Internet GIS with photorealistic multi-user Virtual Worlds. At present there are constraints on how far virtual cities can be developed, but a view is provided on how these networked virtual worlds are developing to aid visual communication in urban planning and urban design

    Remote sensing and geographically based information systems

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    The incorporation of remotely sensed digital data in a computer based information system is seen to be equivalent to the incorporation of any other spatially oriented layer of data. The growing interest in such systems indicates a need to develop a generalized geographically oriented data base management system that could be made commercially available for a wide range of applications. Some concepts that distinguish geographic information systems were reviewed, and a simple model which can serve as a conceptual framework for the design of a generalized geographic information system was examined

    Visualisation, VISC and scientific insight

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    CISRG discussion paper ;

    Recent Computer Technologies for an Innovative Cartographic Language: Espon Cartographic Language, Interim Report 1

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    Review of the state of the art in recent computer technologies and related cartographic software in support of ensuring an innovative cartographic language. The service provider is asked to review the state of the art in recent computer technologies and related cartographic software development in support of ensuring an innovative cartographic language. The service provider shall, based on this review, present options for modernising the ESPON Cartographic Language. The fulfilment of this task should not be limited only to more “traditional” cartography, but explore new options for adding new cartographic concepts, types of illustrations and computer animated presentations, that could support the presentation of the geography of policy orientations and forward-looking territorial evidence to the European territorial policy arena. The review shall lead to recommendations of cartographic technologies and techniques to consider in a modernised ESPON Cartographic Language. It shall be used as input for recommendations on new cartographic elements to consider in a modernised ESPON Cartographic Language under task 4 and 5. Three dimensions for an Innovative cartographic language will be explored in three directions:- Former Semiotic language combined with new technologies- Usability of the produced representations - Focus on added dimensions like interactivity, animation, multimedia, 3D, etc
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