vis4.net | Visual Interaction Development in Flash, HTML5 and Processing
Many people are talking about html5 and the death of Flash in these days, so I decided to do a small speed comparison of map renderings between HTML5 and Flash. I took the quick and dirty example from my previous map rendering tutorial and ported it into html5/javascript. The ...
This tutorial is the third part of a tutorial series about customized map projection in flash/actionscript. It demonstrates how to draw a world map using the as3-proj library and some helper classes. I assume that we read in a shapefile using the SHP library as shown in the previous tutorial.
Today I want to introduce as3-proj, an actionscript port of the java map projection library by Jerry Huxtable, which is itself an partial port of the PROJ.4 library. It's basically a huge set of over sixty ...
Update: I strongly recommend the use of as3-proj instead, which includes far more map projections and lots of other features. Something you definitely need if you're planning to create some geospatial visualizations from scratch is map projection. Map projection means the conversion of sphere coordinates (basically pairs of latitude and longitude values) to 2D-screen coordinates. While this is very easy for smaller regions like single countries things are getting complicated if you want to display the whole world.
Yesterday I read an interesting article in the "AI Journal", which is the german news journal of amnesty international. It was about how many people in the world having internet access and how some governments and companies are censoring internet content. Thereby I saw this map: [caption id="attachment_776" align="aligncenter" ...
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