i202 Fall 2010 School of Information, UC Berkeley

Collecting information is not the same everywhere. This article by The Economist reveals different methods used to collect information for digital maps: from using sophisticated GPS systems in England, to note-taking in India and voluntary contributions in Nigeria. There is no single way to get data from every place, and different information is needed by different users in a variety of contexts. The following questions arise: How do we standarize all these different data-collections?

Proving identity in India can sometime result in frustrating experience. If you go to Bank for opening an account, they will ask for Permanent Account Number (PAN) card issued by finance ministry of India. If you hail from low income group and want to take advantage of subsidized food provided by the government then they will ask for ration card. If you want to exercise your right as a citizen of India during various elections then they will ask for voter ID card. Furthermore, all these proof documents are not linked with each other.

This Economist article describes the use of bar codes in conjunction with mobile phone cameras to provide users with real-time, context-sensitive information. An example of this is the traveller photographing a barcode at a railway station with his mobile phone to obtain train timetables. Despite of varying bar code standards, the author suggests their free, open standard nature will encourage wider adoption. However, for this technology to become pervasive, collaboration between barcode software developer