In order to realize the "pseudo-synchronous communication function" mentioned in 3.1, a system has been implemented to visualize pseudo-synchronously the communication exchanged between the Tuvaluans and the users through lines on the digital globe. After the user enters the name and comment into the comment entry form in the balloon explained in 3.4, a line is drawn between the location of the user on the Earth and the portrait icon of the person whom the comment was sent to. The location of the user is estimated by the IP geolocation method. As the comment is sent, the global IP address of the user is verified with the MaxMind GeolP database (MaxMind) of the server simultaneously, estimating the location information. A line is drawn on the Google Earth through the following system. When the network link kml of the client side accesses the PHP for line output of the server side, the kml file, including each location information of both the user and the portrait icon, is downloaded. All the comments contributed so far will be displayed within the balloon. Through this system, the record of the communication is expressed as the group of lines drawn from various places on Earth.
This allows the pseudo-synchronous visualization of the expanse of global communication including Tuvalu (Fig.5).
TUVALU VISUALIZATION PROJECT
THE ART PROJECT VISUALIZING INFORMATION OF TUVALU ON THE DIGITAL GLOBE
Data SIO. NOAA. U. S. Navy, NGA. GEBCO
C 2011 Cues/Spot Image
Fig. 5. Displaying lines