Barrierefreier Zugang zu offenen Geodaten für sehbeeinträchtigte Personen

April 2nd, 2014

Die letzten Monate forschte ich zum Thema barrierefreier Karten, Ende Februar reichte ich meine Bachelorarbeit mit dem Titel “Barrierefreier Zugang zu offenen Geodaten unter besonderer Berücksichtigung sehbeeinträchtigter Personen” ein. Hier das Abstract:

Diese Bachelorarbeit untersucht den Zugang zu freien Geodaten für sehbeeinträchtigte Personen. Ausgangspunkt ist die Analyse relevanter Literatur und existierender Projekte zu Barrierefreiheit und digitalen Karten. Darauf aufbauend wurden für eine eingeschränkte Zielgruppe Anforderungen an ein barrierefreies Kartendesign erstellt. Anhand eines Prototypen werden die Möglichkeiten von Ziel­gruppenprofilen, personalisierbaren Parametern und der textuellen Repräsentation von Geodaten aufgezeigt. Die Umsetzung erfolgte anhand einer Vektorkarte unter Verwendung von Daten aus OpenStreetMap.

Als Teil der Arbeit entwickelte ich einen Prototypen auf Basis der Vektordaten von Openstreetmap. Anstatt der heute im Web üblichen Rasterkarten rendere ich die Daten direkt im Browser, die einzelen Features wie Strassen, Gebäude und Beschriftungen können so von den BenutzerInnen an ihre Bedürfnisse angepasst werden. Eine Kurzbeschreibung der Software findet ihr hier. Read the rest of this entry »

Customizable vector map for visual impaired ppl

March 14th, 2014

As part of my Bachelor Thesis I investigated accessibility for digital maps from the angle of visual impairment. Taking advantage of characteristics of vector maps, one of the results is a highly customizable map.

serverInstead of using pre (server) rendered raster images, the browser itself takes care of rendering vector data which represents the features in the tile. For example roads are sent as LineStrings, buildings, land and water as Polygons and POIs as Points. Javascript based on vector-osm converts them to SVG, the browser takes care of the rendering. Vector tiles are coming from Mapnik Vector Tiles in GeoJSON format using OpenStreetMap as data provider.

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Neighbourhoods and crisis

February 28th, 2014

Barris i Crisi means neighbourhoods and crisis in Catalan and is an university project which tries to answer two main aims: Analyse the impact of the crisis on social and spatial inequalities in Catalonian municipalities and their effects on the most disadvantaged neighbourhoods. And secondly, identify responses to this situation by the own neighbourhoods and understand the elements which contribute to the resilience of the communities to the crisis.


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Linz Pflückt jetzt auch als Firefox OS WebApp

October 27th, 2013

marketplaceNachdem mir Mozilla freundlicherweise ein Geekphone zugeschickt hat kann ich nun meinem Versprechen nachkommen, Linz Pflückt auf Firefox OS zu portieren. Daher gibts jetzt unser Projekt zur Darstellung aller Obstbäume der Stadt Linz im Mozilla Marketplace von wo es auf Handys mit Firefox OS – aber auch lokal am Desktop als Webapp (ab Firefox 16) – installiert werden kann.

Portieren hört sich nach viel mehr Arbeit an als das Anpassen einer Webanwendung an das neue Betriebssystem von Mozilla eigentlich ist. Ist die Webapplikation responsive konzipiert, besteht der Prozess nur im Schreiben einer Manifest-Datei. Read the rest of this entry »

Pre-populate WordPress posts

September 15th, 2013

This post is about how to pre-fill some fields when opening the Add new posts form (/wp-admin/post-new.php). It’s straight forward for some fields like title and post type but more difficult for other fields. Actually there is no central resource for this and meanwhile I’m still thinking where to include it on WordPress codex, I started to document it here. Read the rest of this entry »

Linz pflückt: Fruits for free

May 26th, 2013

simple_leaf_xxhdpiLinz Pflückt shows more than 2000 public fruit trees in the city of Linz. The basic data comes from the open data portal which was launched as part of the Open Commons Region Linz. The dataset contains information on species, genus, tree height, etc. which we extended with information such as maturity and fruit category.

The fruits of the trees are freely available public domain, which may be picked and eaten by every person! Look at the trees and enjoy the taste of the fruits!

You as fruit fan are invited to evaluate the fruits, comment on the trees and to enrich them with photos. With your submissions, the project is gaining usability and usefulness.

Linz Pflückt is also available as app for Android devices. Owners of other phones can use the mobile version of the website.

The project was built using free software frameworks as OpenStreetMaps, leafletjs and WordPress.

Recoding Roger Vilder

November 12th, 2012

“Variations on 9 squares” by Roger Vilder

My first attemp to recode historic computer art is based on a work from Roger Vilder. He is one of the first artists who worked with computer graphics. “Graphics and Computer Art” magazine published some prints of his “Variation on 9 Squares” in June 1976 (Vol. 1, No. 2).

The idea comes from The ReCode Project, a community-driven effort to preserve computer art by translating it into Processing and publishing it on Github. Started by Matthew Elper and Kyle McDonald, it aims to make computer art available to contemporary artists to learn from, share, and build on. Read the rest of this entry »

Processing for FirefoxOS

September 24th, 2012

Screen capture of Firefox OS (Desktop build on Ubuntu) with installed Web app written in Processing

With Firefox OS getting closer to it’s release we will finally get our free mobile operating system (RIP Maemo). Based on a Linux kernel it boots into the runtime engine behind Firefox running webapps written in HTML, Javascript and other open web APIs. In short, it’s a mobile OS powered by Javascript. Magical!

Since processing.js ships with version 2 of Processing, our favorite creative coding tool now is one of the most powerful languages for creating HTML5 animations, interactive apps and games.

Here I will show the necessary steps for running apps written in Processing on Firefox OS. Read the rest of this entry »