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Enhancing Accessibility of Web Based GIS Applications through User Centered Design / Ökad tillgänglighet av webbaserade GIS-applikationer genom användarcentrerad designBabar, Shahzad, Mehmood, Aamer January 2010 (has links)
Web Accessibility emerged as problem when disabled and elder people started interaction with web contents soon after the inception of World Wide Web. When web based GIS applications appeared on the scene of web and users of these kinds of applications increased, these applications faced the similar problem of accessibility. The intensity of web accessibility problems in GIS based applications has increased rapidly during recent years due to extensive interaction of user with maps. Web Accessibility problems faced by users of GIS applications are identified by content evaluation and user interaction. Users are involved in identification of accessibility problems because guidelines and automated tools are not sufficient for that purpose. User Centered Approach is used to include users in the development process and this has also helped in identification of accessibility problems of the users at early stages. The thesis report identify the accessibility issues in Web based GIS application by content evaluation and user interaction evaluation. MapQuest, a web based GIS application, is taken as a case study to identify the web accessibility problems in GIS applications. This thesis report has also studied that how accessibility of the web based GIS applications can be enhanced by using UCD approach in development process of GIS applications. / Webbtillgänglighet fram som problem när funktionshindrade och äldre människor började interaktion med webb-innehåll strax efter starten av World Wide Web. När webbaserade GIS-applikationer på scenen av webb och användare av dessa typer av tillämpningar ökat, dessa tillämpningar mötte liknande problem med tillgängligheten. Intensiteten av problem webbtillgänglighet i GIS-baserade applikationer har ökat snabbt under senare år på grund av omfattande interaktion med användaren med kartor. Webbtillgänglighet problem som användare av GIS-applikationer är identifierade med innehåll utvärdering och interaktion med användaren. Användare delta i identifieringen av tillgänglighetsproblem eftersom riktlinjer och automatiserade verktyg är inte tillräckliga för detta ändamål. Användarcentrerad metoden används för att inkludera användarna i utvecklingsprocessen och detta har också bidragit till en kartläggning av tillgängligheten problem för användarna i ett tidigt skede. Avhandlingen rapport identifiera tillgänglighetsfrågor i Webbaserade GIS-applikation av innehåll utvärdering och användarinteraktion utvärdering. MapQuest, en webbaserad GIS-applikation, tas som en fallstudie för att identifiera problemen webbtillgänglighet i GIS-applikationer. Denna uppsats Rapporten har också studerat hur att tillgängligheten av webbaserade GIS-applikationer kan förbättras med hjälp UCD strategi i processen för utveckling av GIS-applikationer.
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Webbtillgänglighet ur ett utvecklarperspektivMalmgren, Oscar, Danielsson, Thomas January 2016 (has links)
Webbens centrala position i det moderna informationssamhället kan svårligen ifrågasättas. Men övergången till ett digitalt informationssamhälle kan också innebära problem för en grupp människor i samhället. I takt med webbens tilltagande inflytande i samhället ökar den demokratiska betydelsen av att innehållet är tillgängligt för alla som vill ta del av det, oavsett fysiska och kognitiva förutsättningar. För att underlätta för personer med funktionsnedsättningar att använda internet växte begreppet webbtillgänglighet fram. Trots ämnets ökade relevans har studier konstaterat att webben av idag är behäftad med stora tillgänglighetsbarriärer. Webbutvecklare är dem yrkeskategori som har störst inflytande över webbplatsers tekniska utformning och således ett starkt inflytande över webbens tillgänglighet. Den här studien undersöker varför professionella webbutvecklare inte efterlever standarder och inte skapar tillgängliga webbplatser – trots att en rad uppsättning riktlinjer och verktyg finns tillhands för att åstadkomma detta. Studien följer en interpretativ forskningsansats och bygger på semi-strukturerade intervjuer med fem professionella webbutvecklare. Ett av studiens grundläggande slutsatser är att webbtillgänglighet idag ofta är nedprioriterad aspekt som endast beaktas explicit om beställaren efterfrågar detta. Ett hinder utvecklare möter i arbetet med att skapa tillgängliga webbplatser är således brist på efterfrågan från beställare vilket i sin tur ger begränsade tids- och budgetresurser och affärsmässiga incitament. I de fall där tillgänglighet efterfrågas görs det nästan uteslutande av företrädare från offentliga organisationer vars regelmässiga kontext kräver det. I dessa sammanhang kan otydliga riktlinjer samt otillräckliga kunskaper vara en faktorer som försvårar arbetet med tillgänglighet. WCAG-riktlinjer upplevs av webbutvecklare som alltför omfattande och omoderna vilket medför att riktlinjerna inte fungerar som den stödjande resurs som är avsikten. Dessutom verkar det råda förvirring kring vad som definierar god tillgänglighet och hur en webbplats tillgänglighet ska utvärderas. Avsaknaden av moderna och lättillgängliga riktlinjer tillsammans med tydligt definierade mätpunkter och tillhörande utvärderingsverktyg är ett hinder för utvecklare i arbetet med webbtillgänglighet.
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En webbplats för alla – problem och utmaningar : En fallstudie om hur en myndighet arbetar med tillgänglighet på webben och vilka problem och utmaningar det kan innebära / A website for everyone – problems and challenges : A case study on how a government works with web accessibility and the problems and challenges this work faceJohansson, Viktor, Ekström, Sebastian January 2015 (has links)
Tillgänglighet på webben är ett fenomen som blivit allt mer uppmärksammat på senare tid, i synnerhet för myndigheter, i och med nya lagar och internationella standarder. Begreppet innebär att personer med funktionsnedsättningar ska kunna uppfatta, förstå, navigera och interagera med webben. Resultatet av denna studie visar dock på att även språk kan ses som en del av arbetet med tillgänglighet. Den ökade uppmärksamheten till trots har det visat sig att det i dagsläget finns många webbplatser med bristande tillgänglighet. Vissa av dessa brister går att koppla till hur man arbetar med tillgänglighet och de problem och utmaningar som finns i detta arbete, något som denna studie har syftat att undersöka. Studien har genomförts i en kvalitativ och tolkande anda genom en fallstudie på Migrationsverket som är en av 22 så kallade strategiska myndigheter med ett särskilt ansvar i funktionshinderspolitiken. Insamlingen av det empiriska materialet har gjorts med hjälp av sex intervjuer av fem olika respondenter med ett uttalat tillgänglighetsansvar hos fallorganisationen. Det empiriska materialet har sedan jämförts och relaterats till tidigare forskning för att skapa ett trovärdigt resultat och för att möjliggöra generella slutsatser. Resultatet av studien visar att riktlinjer, användarinvolvering och tekniska hjälpmedel är vanliga komponenter i arbetet med tillgänglighet och att språk bör inkluderas som en del av tillgänglighet. Studien redogör även för att myndigheter kan ställas inför problem och utmaningar i tillgänglighetsarbetet i form av bristande attityd, bristande kompetens, bristande stöd från ledningen, otillräckliga verktyg, otillräckliga standardriktlinjer, komplicerad användarinvolvering, offentlig upphandling samt föråldrade system. / Web accessibility is a phenomenon that recently has drawn a lot of attention, particularly for governments, with enforcement of new laws and international standards. The term Web accessibility is about how people with disabilities are able to perceive, understand, navigate and interact with the web. The results of this study, however, show that language also can be a part of web accessibility. Even though the attention has increased, it has been shown that lots of websites suffer from poor accessibility. Some of these deficiencies can relate to how people work with web accessibility and the problems and challenges this work face, which is something this study has aimed to investigate. The study has been conducted in a qualitative interpretive spirit with a case study at Migrationsverket, which is one of 22 so called strategic governments in Sweden with a special responsibility towards disability politics. The data has been gathered through six interviews with five different people with responsibility towards web accessibility within the studied organisation. The empirical data were then compared with previous research in the area in order to achieve a credible result and enable general conclusions. The results of the study highlights guidelines, user involvement and technical tools as common components in the process of working with web accessibility and that language should be included as a part of web accessibility. The study also emphasizes that governments can bump into problems and challenges in this process in the form of lack of attitude, lack of competence, lack of managerial support, inadequate tools, inadequate standard guidelines, complicated user involvement, government procurement and out dated systems.
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Studie av webbtillgänglighet för de med läs- och skrivsvårigheter : Analys av universitets och högskolors webbplatser / Study of Web accessibility for those with reading and writing difficulties : An analysis of Swedish university websitesOtteryd, Christine January 2013 (has links)
Det här arbetet innefattar webbtillgänglighet med avseende hur väl ett antal utvalda universitet och högskolor följer de riktlinjer för personer med läs- och skrivsvårigheter. Problemet med att inte ha en webbtillgänglig webbplats är att en stor grupp av personer som går miste om innehållet. Det är dessutom inte bara personer med läs- och skrivsvårigheter som blir drabbade, utan det är även personer med andra livssituationer som drabbas. Syftet med arbetet är att ta fram rekommendationer och finna lösningar som gör att universitet och högskolors webbplatser blir tillgängliga för alla. Analysen som görs i arbetet är baserad på W3C WAI:s riktlinjer om tillgänglighet och är avgränsad till användare med dyslexi. I uppsatsens analys används en kvalitativ metod där riktlinjerna jämförts mot webbplatserna. Ett antal testpersoner har också analyserat samma webbplatser och gett egna utlåtanden, detta för att få ett bredare omfång till rekommendationerna. Avseende resultatet visar det att webbplatserna överlag brister i webbtillgängligheten, både i stora drag och i mindre. Rekommendationer togs fram efter analysen och visar hur de bristerna går att lösa, med enkla medel. Slutsatsen är att med hjälp av rekommendationerna, kan en webbplats bli tillgänglig för alla oavsett om användaren har läs- och skrivsvårigheter eller inte. / The aim of this study is to evaluate how well Swedish university websites is accessible for users with dyslexia. Websites that is not accessible leaves out a large group of people. The purpose of this study is to find solutions and give recommendations for improvement, to make sure the university websites is accessible for all persons. The analysis in the study is based on W3C WAI guidelines about accessibility and is concentrated to users with dyslexia. Methods used in the study are a qualitative method where the guidelines were compared with the university websites. Also a couple of persons have tested and handed out their opinions about the same websites. The result after analyzing the websites shows that the websites lack web accessibility, both in bigger and minor parts. A solution to the web accessibility problem is the recommendations, which was produced after the analysis. The conclusion of the study is that a university website can be accessible with the help of the recommendations.
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Automatic Web widgets prediction for Web 2.0 access technologiesChen, Alex Qiang January 2013 (has links)
The World Wide Web (Web) has evolved from a collection of static pages that need reloading every time the content changes, into dynamic pages where parts of the page updates independently, without reloading it. As such, users are required to work with dynamic pages with components that react to events either from human interaction or machine automation. Often elderly and visually impaired users are the most disadvantaged when dealing with this form of interaction. Operating widgets require the user to have the conceptual design knowledge of the widget to complete the task. Users must have prior experience with the widget or have to learn to operate it independently, because often no user documentation is available. An automated Widget Prediction Framework (WPF) is proposed to address the issues discussed. It is a pre-emptive approach that predicts different types of widget and their locations in the page. Widgets with similar characteristics and functionalities are categorised based on a definition provided by widget design pattern libraries. Some design patterns are more loosely defined than others, and this causes confusion and ambiguity when identifying them. A formal method to model widgets based on a Widget Ontology was developed. The paradigm of the ontology provides a framework for developers to communicate their ideas, while reducing ambiguity between different types of widget. A Widget Prediction System (WPS) was developed using the concepts of the WPF. To select the types of widget for WPS evaluation, a widget popularity investigation was conducted. Seven of the most popular widgets from the investigation, done across fifty Websites, were selected. To demonstrate how WPF can be applied to predict widgets, fifty websites were used to evaluate the feasibility of the approach using WPS. On average, WPS achieved 61.98% prediction accuracy with two of the widgets > 84% accuracy. These results demonstrated the feasibility of the framework as the backend for tools that support elderly or visually impaired users.
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Um auxílio à navegação acessível na web para usuários cegos / An accessible web navigation aid for blind usersRafael José Geraldo 19 September 2016 (has links)
Acessibilidade na Web tem como objetivo possibilitar que qualquer pessoa possa entender e interagir com o conteúdo de uma página Web, independente de deficiências ou outros fatores. Embora exista uma grande quantidade de trabalhos realizados na área, pode-se ainda perceber que pessoas com alguns tipos específicos de deficiências encontram mais dificuldades ao navegar na Web, como no caso dos usuários cegos. Com intuito de minimizar os problemas enfrentados por esses usuários cegos ao navegar na Web, foi proposta nesta tese uma abordagem que consiste em extrair automaticamente o conhecimento de navegação implícito na apresentação visual de uma página Web e alterar o design dessa navegação de uma maneira otimizada a esses usuários. Com esse objetivo, primeiramente foram estudados os trabalhos relacionados aos principais problemas enfrentados pelos usuários cegos ao interagir com a Web, assim como os conjuntos de diretrizes de acessibilidade e usabilidade específicos para minimizar esses problemas, fundamentados em um mapeamento sistemático conduzido sobre o tema. Após a identificação dos problemas e diretrizes, foi desenvolvido um classificador baseado no método Naïve Bayes, considerando-se três características comumente encontradas nos padrões de design de menus de navegação, com intuito de classificar automaticamente os links contidos nesta página em diferentes classes referentes às estruturas de navegação. Após desenvolvido, o método foi testado e avaliado em sites governamentais por meio de uma análise estatística, apresentando um boa taxa de acerto em suas classificações. Com base nas dificuldades encontradas na primeira etapa de pesquisa, foi proposto um modelo de interface próprio aos usuários cegos que utilizam a Web com auxílio de um leitor de tela. Com base no classificador desenvolvido, foi proposta uma abordagem para automaticamente transformar os links de navegação classificados pelo método, em um padrão de navegação otimizado aos leitores de tela. Como prova de conceito, foi realizada uma extração semiautomática de conteúdo das páginas Web, com intuito de transformar esse conteúdo para o novo modelo de interface proposto. Nesse contexto, foi desenvolvido um protótipo de mecanismo de apoio, denominado NavAux. Esse protótipo foi avaliado através de um percurso cognitivo. Para isso, foram definidas algumas tarefas e a exploração da interface foi realizada com apoio do leitor de tela JAWS. Os resultados apresentaram indícios de que a abordagem proposta pode ser considerada uma alternativa viável para minimizar os problemas de acessibilidade enfrentados pelos usuários cegos ao navegar na Web. / Web Accessibility aims to enable that any individual may understand and interact with a Web page content, regardless of disabilities or other factors. Although there is a large number of research studies in this area, it can be noted individuals with some specific types of disabilities find it more difficulty browsing the Web, such as those who are blind. In order to minimize the problems faced by blind users when browsing the Web, the study reported in this thesis proposed an approach which consists in automatically extracting the navigation knowledge implicit in the visual presentation of a Web page and changing this navigation design to an optimized way to those users. For this purpose, the research started with a review of the papers related to the main problems faced by blind users when interacting to the Web, as well as the specific sets of accessibility and usability guidelines to minimize these problems, based on a systematic mapping study conducted on the topic. After identifying the problems and guidelines, the next step involved the development of a classifier based on the Naïve Bayes methods, considering three features commonly found in the design patterns of navigation menus, in order to automatically classify the links contained on each page into different classes relating to the navigation structures. After developed, the method was tested and assessed in governmental websites through an statistical analysis, showing a good success rate in its classifications. Based on the difficulties encountered during the first step of the research, the study proposed an interface model tailored to blind users who use the Web with the help of a screen reader. Based on the developed classifier, the study proposed an approach to automatically transform the browsing links classified by the method into an optimized navigation standard to screen readers. As a proof of concept, the following step involved a semi-automatic extraction of Web pages content, in order to transform this content to a new proposed interface model. In this context, was developed a prototype of the mechanism, named NavAux. This prototype was evaluated through a cognitive walkthrough. To this, were defined some tasks and the interface operation was performed with support of the JAWS screen reader. The results presented signs that the proposed approach can be considered a viable alternative to minimize the accessibility problems faced by blind users when browsing the Web.
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Menus de navegação em aplicações Web para dispositivos móveis: questões de acesso e usabilidade / Navigation menus in Web applications for mobile devices: issues of access and usabilityHumberto Lidio Antonelli 21 December 2015 (has links)
A diversificação nas formas de acesso à Web, alavancada pelo crescente uso de dispositivos ubíquos, principalmente smartphones e tablets, tem motivado o desenvolvimento de métodos para adaptação do conteúdo disponível na Web, dado que grande parte do conteúdo não foi projetado para ser acessado nesse novo contexto. O conteúdo Web é composto por diversos elementos que, em geral, fornecem interatividade aos usuários. Alguns destes elementos, tais como menus, são responsáveis por auxiliar a navegação no site, ajudando na localização e acesso das informações que por ventura o usuário esteja procurando. No entanto, muitos dos menus disponíveis na Web não foram desenvolvidos de uma forma acessível e nem suportam a interação em dispositivos, criando dificuldades que impedem os usuários interagirem satisfatoriamente com esses elementos. Além da diversificação de modos de acesso, existe também a diversificação do perfil de usuários que fazem uso dos recursos da Web. Alguns desses usuários encontram barreiras que tendem a dificultar ou limitar seu acesso às aplicações e conteúdos Web em geral. Nesse sentindo, este trabalho teve como objetivo principal abordar o problema de adaptação de conteúdo Web para dispositivos móveis, com foco nos menus, fornecendo uma solução personalizada de acordo com as preferências do usuário, a fim de que as barreiras de interação fossem reduzidas ou eliminadas. Inicialmente estudou-se os diferentes padrões de menus, bem como as diretrizes de acessibilidade e usabilidade para criação de menus acessíveis. A partir desses estudos, foi desenvolvido uma metamodelo que deu origem a linguagem AMenu, contendo todos os detalhes técnicos sobre a acessibilidade e usabilidade. Em seguida, foi desenvolvida a ferramenta AMeG, para validar a linguagem AMenu. Com base na avaliação da linguagem, foi desenvolvido o mecanismo de adaptação, que faz uso da linguagem AMenu para geração dos menus acessíveis e adaptados para dispositivos móveis. Finalmente, um estudo de caso com usuários idosos foi conduzido, a fim de comparar os menus gerados pelo mecanismo em relação aos menus originais. Os resultados obtidos apontam um melhor desempenho na interação com os menus gerados pelo mecanismo, uma vez que os participantes obtiveram uma redução de 54% no tempo de realização das tarefas e cometeram 82% menos erros. Por outro lado, os resultados apontam que todos os participantes responderam melhor à abordagem de adaptação desenvolvida neste estudo, uma vez que eles conseguiram concluir com sucesso todas as tarefas definidas para o estudo. / The diversity of means to use the Internet, ensured by the growing upcoming of ubiquitous devices such as tablets and smartphones, has promoted research on adaptation of the content that used to be mostly targeted only to desktop platform into this new context now known as the mobile devices. Some of the elements such as the menus are designed to facilitate the usage of the website once they help at finding and using the information that the user looks for. However, most of the menus available on websites do not apply the mobile devices, nor provide users with interaction, which nearly disables the interaction with the mentioned devices. There yet must be added the profile diversity of the web content users. Some of these users, such as elderly people, find limitations that tend to hamper their access to web content on the mobile devices, once aging commonly represents both physical (visual, hearing and motor abilities) and cognitive (attention, memory and reasoning issues) impairment that directly interferes on the usage of the computing devices that do not portray adjustments to such audience profile. This paper aims at investigating the issues related to the adaptation of web contents into the mobile devices. We focused on the menus in order to reduce or eliminate the limitations elderly people could find while using the mobile devices. We initially analyzed different patterns and structure of menus, as well as the guidelines upon accessibility and usability involved in the menus designing process. Based on this analysis, we developed a metamodel that originated the AMenu language, in which all technical data upon accessibility and usability involved in the menus designing process was included. Then, we developed the AMeG tool in order to assess the language created under the development perspective. Based on this assessment, we developed of an adaption mechanism that uses the AMenu language to generate menus adapted to the mobile devices. We then run a study case with elderly people in order to assess the menus generated by the mechanism, based on the comparison with the original ones. The results demonstrated that the participants had a better performance in the interaction while using the menus generated by the mechanism rather than the original ones, since they spent 54% less time performing tasks and made 82% less mistakes compared to the original menus. We also verified a quitting average of 33% among the participants while performing the assigned tasks using the original menus. On the other hand, the results point out that all participants responded better to the approach developed in this study as they all managed to successfully finish all the assigned tasks.
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Design och evaluering av en universitetskurs om webbtillgänglighet : Med fokus på pedagogiska arbetssätt samt ett kursmoment om assisterande teknik / Design and evaluation of a university course on web accessibility : With a focus on teaching methods and assistive technologyLjungberg, Alexandra January 2021 (has links)
En pågående digitalisering av det svenska samhället gör att tillgänglighet inte längre är ett enbart fysiskt fenomen utan också ett digitalt. Allt fler av samhällets viktiga tjänster, såsom hälsovård och banktjänster, går över helt eller till stor del till den digitala världen. I och med den ökande närvaron av digitala lösningar finns ett ökande behov av kunskap inom webbtillgänglighet. Syftet för uppsatsen är att på uppdrag av informatikgruppen vid Karlstads universitet undersöka hur en universitetskurs om webbtillgänglighet kan utformas på B-nivå(G1F). Uppsatsförfattarens huvudsakliga fokus har varit de arbetssätt som kan vara av vikt när man lär ut en kurs i webbtillgänglighet och att utforma, följa och utvärdera en workshop där studenter får bekanta sig med de problem som en användare med synnedsättning kan uppleva på webben. Undersökningsfrågorna evaluerades genom observation av föreläsningar och workshops under pilotkursen Framtida Webbstandarder som uppsatsförfattaren tillsammans med en annan uppsatsstudent hjälpt till att formge. Utöver observationerna gjordes en intervju med undervisande lärare och en webenkät skickades ut till studenterna där de gavs möjlighet att yttra sina åsikter om kursen. Efter analys av insamlade data kan det konstateras att en kurs inom webbtillgänglighet kan gynnas av att ha en blandning av teoretiska och praktiska moment för att lära ut det aktuella materialet och att studenter kan engageras i ämnet genom diskussionsuppgifter under föreläsningarna. Den analyserade data visar också på att man kan bygga upp en workshop på sådant sätt att studenterna får testa på olika nivåer av assisterande teknik för synnedsättningar och på så sätt ge dem en övergripande erfarenhet och förståelse för de problem som personer med synnedsättning kan uppleva på webben.
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Formalizace a validace přístupnosti webových stránek / Formalization and Validation of Web AccessibilityMarcely, Peter January 2012 (has links)
Users with different types of handicaps access web pages with wide scale of device. Thus, it is often difficult to develop web sites in order to be accessible for everyone. This thesis takes into consideration specific guidelines for accessible content of web pages as well as formalization of their rules and subsequent validation of these rules.
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An analysis of the Swedish web accessibility law through two public sector websites : A comparative study on the Student Financial Aid,and the Public Employment Service.Johnsson, Linnéa, Wiman, Anna January 2020 (has links)
Purpose The purpose of this study was to investigate how well the law on accessibility is implemented, to find what implications there might be when accessing a website, and to find out how well a website needs to be adapted for it to be accessible. Method The researchers made a comparative study between the Swedish public sector desktop websites, the Student Financial Aid and the Public Employment Service. The method used was a combination of automatic and manual evaluation of the accessibility on the websites. In the Automatic Evaluation the free tool A-checker, and a color contrast tool was used to check the code from the WCAG framework 2.0 AA. In the manual evaluation the researchers conducted a heuristic evaluation based on the WCAG’s checklist, a survey with 60 participants, and user tests with 5 participants using assistive technologies such as only using the keyboard, resizing the text and disabling the CSS sheet. The tests provided an input on how the websites can be accessed with assistive technologies and what improvements could be made. Findings This research found by conducting a survey, that 43.3% were not aware of the accessibility law, and that 58.3% were not aware that they can complain to the supervisor authority if a website is not accessible. Because of the lack of knowledge, this might make it harder for companies to adapt their websites to be accessible. Further, the researchers found that since A-checker uses WCAG’s framework, it takes time to interpret what the recommendations actually mean. The other automated tool, the colour contrast tool was easy to interpret for the researchers, and the checklist from WCAG helped as a guide, even though the checklist was more time consuming. Implications The researchers were not able to find any participants with any of the disabilities which the thesis focuses on. Limitations In order to test the websites, the participants were using assistive technologies. The researchers could not get access to a screen reader, therefore the user tests were conducted by disabling the CSS sheet. In the survey, not enough participants with disabilities answered, therefore some of the results were discluded from the study. Keywords Web accessibility, Web inclusion, Web exclusion, WCAG
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