Refining an object-oriented GIS design model

Gordillo, Silvia; Balaguer, Federico

doi:10.1145/288692.288707

Cited by 14 publications

(4 citation statements)

References 3 publications

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“…For all maps used in the experiments, polygons are described as open polygonal lines as defined by the Polygon-arc Topology 21,2 . This data structure removes duplicate paths which separate adjoining polygons leading to a more compact representation.…”

Section: Resultsmentioning

confidence: 99%

A progressive vector map browser for the web

2009

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Abstract:With the increasing popularity of web-based map browsers, remotely obtaining a high quality depiction of cartographic information has become commonplace. Most web mapping systems, however, rely on high-capacity servers transmitting pre-rendered tiled maps in raster format. That approach is capable of producing good quality renderings on the client side while using limited bandwidth and exploiting the browser's image cache. These goals are harder to achieve for maps in vector format. In this work, we present an alternative client-server architecture capable of progressively transmitting vector maps in levels-of-detail (LOD) by using techniques such as polygonal line simplification, spatial data structures and, most importantly, a customized memory management algorithm. A multiplatform implementation of this system is described, where the client application is written entirely in JavaScript and processed within the web browser, avoiding the need of external applications or plug-ins. Results of experiments aimed at gauging both the performance and the display quality obtained with the system are presented and explained. Extensions to the system are also discussed, including issues such as level-of-detail versus visual importance tradeoffs and the handling of closed polygonal lines.

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Section: Resultsmentioning

confidence: 99%

A progressive vector map browser for the web

2009

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“…The next phase, will be take the suggestions, observed behaviors and needs to propose extensions to UML to deal with spatial features. Though there are advances in this issue [2], they have focused in provide UML artifacts with spatial and temporal capabilities. However there are other issues that must be covered as network analysis, metadata, scale and three-dimensional features, ignored by the current methodologies.…”

Section: Discussionmentioning

confidence: 99%

Using Ethnographic Techniques to Describe Requirements Engineering Processes in Geographic Information Systems Workgroups

Cardona¹

2007

Proceedings of the 5th International Workshop on Modelling, Simulation, Verification and Validation of Enterprise Information S

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Geographic Information Systems (GIS) are a relevant field in Information Systems. However GIS applications are hard to develop given the disciplinary heterogeneity of GIS working groups. This paper presents the initial results of a qualitative study conducted to describe the GIS community requirements processes and needs. Ethnographic techniques are being used to achieve this goal. Ethnography is a discipline taken from social sciences that puts a strong emphasis on the Field Work and for this reason its conceptual framework and tools are presented. Applied through field work in different GIS scenarios as government offices, private consultants, NGOs 1 and academy the obtained results are described allowing the identification of clue features related to requirements engineering for GIS applications. Finally, the conclusion includes reflections on the Ethnographic techniques and considerations (such as to extend UML) to design better methodologies for GIS-RE.

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“…We have extended an existing GIS architecture constructed at LIFIA [4] for handling continuous fields. Furthermore, we have developed the Tilcara application, using this OO-architecture.…”

Section: Figure 1: Two Different Sdm -Tin and Point Grid-for The Samementioning

confidence: 99%

Tilcara

Zambrano

Polasek

Gordillo

et al. 2000

Addendum to the 2000 Proceedings of the Conference on Object-Oriented Programming, Systems, Languages, and Applications (Addend

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It is now usual that GIS applications need to define and handle continuous information. This is of extreme relevance in areas like meteorology and environmental applications. GIS do not have tools that allow the use of this type of information, which often prevents to make a complete analysis. In this work we present an application using object-oriented technology that allows us to manipulate continuous data.

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Refining an object-oriented GIS design model

Cited by 14 publications

References 3 publications

A progressive vector map browser for the web

A progressive vector map browser for the web

Using Ethnographic Techniques to Describe Requirements Engineering Processes in Geographic Information Systems Workgroups

Tilcara

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