The Geospatial Public Transport Information available for the United Kingdom on the World-Wide Web is evaluated. Searches for relevant websites were made at different geographical scales; the breadth of content covered and level of technology used was assessed for each site found. Public Transport Maps on each website were rated according to eleven aspects of cartographic design and Web functionality. It was found that interactivity (represented by the use of higher technology) was greater for websites giving Public Transport Information for larger areas; however, the majority of information was communicated through text or static maps. The use of colour and symbology was generally found to be good in Public Transport Web maps, but marginalia was often insufficient and hardcopy printing sometimes inadequate, limiting the usability of the maps. A number of guidelines for good practice in the production of Public Transport Web maps are suggested, stressing the importance of clarity and legibility, plus some comments on website functionality.Keywords: Geospatial Public Transport Information, World-Wide Web, Internet mapping, Content Technology Matrix, Web functionality
INTRODUCTIONGeospatial Public Transport Information, or GPTI, takes a variety of forms: it can be expressed as a set of written (or spoken) instructions; it can take the form of tabular data (a timetable); it can be visualised in map form; or it can be a combination of these methods.Public and private bodies provide this information for members of the general public who may wish to make a journey on public transport or otherwise ascertain service information. Historically, GPTI has been produced in the printed format but advances in technology have seen the use of other media such as electronic display boards, touchscreen terminals, home computers linked to the WorldWide Web, and portable devices such as mobile telephones. Access to information is greater than ever and GPTI is becoming increasingly interactive in its nature.Public Transport Information (PTI) may include details of vehicles or associated infrastructure like roads or station facilities; this study is solely concerned with information on public transport journeys, i.e. information that has a geospatial component. For the purposes of the study, 'public transport' includes regular timetabled travel by bus; train; tram, trolley bus, or light rail; subway, metro or underground; boat or ferry; and aeroplane. On-request bus journeys or those by taxi or minicab are not included; neither are special tourist services.There are some good existing guidelines about the presentation of PTI on the Web (ILT, 1999; ITS, 2002;Kenyon et al., 2001) but little mention is made in these of cartographic design. Mooney and Winstanley (2001) looked at schematic representations in GPTI and the need for public transport maps to be rotatable if they are to fulfil their potential, while Lyons (2001 and2002) looks at how the presentation of travel information can influence users' choices. An overview of Internet-bas...