Interactive map applet for illustrative purposes

Sorokine, Alexandre; Merzliakova, Irina

doi:10.1145/288692.288702

Cited by 6 publications

(6 citation statements)

References 0 publications

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“…Client-side solutions typically ship vector geographic data (in a format such as ESRI shapefile, Vector Markup Language (VML), Scalable Vector Graphics (SVG) or Geography Markup Language (GML)) to the client computer, where the data are interpreted and rendered. The two typical solutions are (1) by software implemented in Java, such as Descartes (Andrienko and Andrienko 1999) (which later became part of CommonGIS (CommonGIS Consortium 2002)), DC Maps (Dynamic Choropleth Maps) (United States EPA 2003), Interactive Map Applet (Sorokine et al 1998), and CIESIN's Demographic Viewer (CIESIN 2002), (2) or with the help of various specialized browser plug-ins (or special browsers), such as AXIOMAP (Zaslavsky 2000), CDV (Dykes 1997), GeoMedia Web Map (Intergraph Corp. 2000), Autodesk MapGuide (Autodesk 2000), and Flash Geovisualization prototype (Steiner et al 2002). Mapping software is either pre-installed on the client computer or downloaded each time along with map and data information.…”

Section: Introductionmentioning

confidence: 99%

Colour‐coded pixel‐based highly interactive Web mapping for georeferenced data exploration

Zhao

Shneiderman

2005

International Journal of Geographical Information Science

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This paper describes a pixel-based technique that enables highly interactive Web choropleth maps for georeferenced data publishing and visual exploration. Instead of delivering geographic knowledge to the client in polygon-based vector formats, we encode geographic object IDs and shape information into highly compact pixel images (decoding maps). This allows the combination of raster and vector characteristics while avoiding the problems in the currently existing pixelbased (raster-image-based) or vector-based techniques. Differing from traditional pixel-based techniques that are static and allow very little user interaction, our pixel-based technique allows varieties of sub-second (less than 1 s) interface controls such as dynamic query, dynamic classification, geographic object data identification, user-setting adjusting, as well as turning on/off layers, panning and zooming, with no or minimum server support. Compared with Web GIS techniques that use vector geographic data, our technique avoids transferring over the network large vector geographic data. It also avoids the non-trivial client-side computation to interpret the vector data and render the maps. Our technique features a short initial download time, near-constant performance scalability for larger numbers of geographic objects, and download-mapsegment-only-when-necessary which potentially reduces the overall data transfer over the network. As a result, it accommodates general public users with slow modem network connections and low-end machines, as well as users with fast T-1 connections and fast machines. The client-side (browser) is implemented as lightweight Java applets. YMap, an easy-to-use, user-task-oriented highly interactive mapping tool for visual georeferenced data exploration is implemented using this technique. The performance comparison of YMap to some other vector-based Web GIS demonstrates the feasibility and benefits of this technique.

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Section: Introductionmentioning

confidence: 99%

Colour‐coded pixel‐based highly interactive Web mapping for georeferenced data exploration

Zhao

Shneiderman

2005

International Journal of Geographical Information Science

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“…Segundo Fernández et al [FNC+oo], a capacidade de programação, implementação multi plataforma, facilidades para o desenvolvimento de aplicações distribuídas, dentre outras características têm feito de Java uma das ferramentas mais desejáveis para o desenvolvimento de software. Para Sorokine et al [SM98] , Newton et al [NGS97], JAVA é uma linguagem ideal quando se necessita incrementar a portabilidade e permitir o acesso a partir de qualquer browser Web.…”

Section: Linguagens Para Desenvolvimento De Sistemas Webunclassified

“…São exemplos de funcionalidades disponibilizadas: fun ções de inserção/ modificação de dados, validação de formato e conversão [Fag99]. O sistema de busca e navegação analisado por esta dissertação (ver capítulo 5) permite realizar consultas tanto textuais, a partir de formulários pré-definidos, como também consul tas interativas sobre mapas [SM98,K096]. Desta forma, o sistema disponibiliza dois tipos básicos de formas de acesso: as que irão acessar os repositórios usando funções já especificadas e pré-computadas (semelhantes a visões) e aqueles que permitem a navegação nos repositórios.…”

Section: Gerenciamento De Dados E Metadadosunclassified

“…No entanto, existem diversos outros formatos de arquivo possíveis que devem ser avaliados. Para Sorokine et al (SM98] , do ponto de vista do programador, existem três tipos de solução para o mapeamento vVV•l'W destas imagens: imagem GIF com formulários HTML ou JavaScript, applets Java e controles ActiveX. Contudo, segundo Sorokine et al [SM98], cada uma destas soluções apresenta alguns problemas.…”

Section: Extensõesunclassified

“…Para Sorokine et al (SM98] , do ponto de vista do programador, existem três tipos de solução para o mapeamento vVV•l'W destas imagens: imagem GIF com formulários HTML ou JavaScript, applets Java e controles ActiveX. Contudo, segundo Sorokine et al [SM98], cada uma destas soluções apresenta alguns problemas. O uso de imagem GIF, a mais popular e simples, é inapropriado devido à frequente necessidade de recarregamento mesmo para operações simples, tais como pane zoom.…”

Section: Extensõesunclassified

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