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- W2599399745 abstract "Personal travel and its evolution are of concern to urbanplanners. This paper reports on a four-month trialundertaken in Quebec City to test the feasibility ofrecording personal travel over a multi-week period usingGPS (Global Positioning System), and analyzing theresults using a regional GIS with a substantial number ofdata overlays. It was decided: (a) to limit this trial tovehicle travel to minimize problems of power supply andto allow relatively heavy equipment to be used if required;(b) to simplify route-matching in the GIS by using theCanadian Coast Guard's differential correction signal inreal-time; and (c) to use two types of off-the-shelf DGPS(Differential GPS) receiver. One of the DGPS systemsconsisted of a GPS receiver, differential module, and aportable computer, all connected to a car's cigarettelighter, while the other had data storage built into theDGPS receiver and was powered by two VCR batteries.Data were transferred as ASCII files. Routines weredeveloped for route matching with and without differentialcorrection, and for the recognition of stops at activitylocations. This paper summarizes the results of the test analyses,which were undertaken in MapInfo„1# These includeddata quality and outages, travel time and distance by classof road, speed, acceleration-deceleration, and the timing,frequency and geographical range of activities. Theaccuracy of differential positioning was comparable to themap database used in this research (5-10m), and fewerthan 10% of points required adjustment by the algorithm.We compare of the methods of data collection using thedifferent types of receiver, together with a variety of pilotdata interfaces. Finally, the discussion is given to newdirections for spatio-temporal analyses of urban travelwhich are enabled by this type of GPS data." @default.
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- W2599399745 date "1999-09-17" @default.
- W2599399745 modified "2023-09-23" @default.
- W2599399745 title "Extending the Scope of Travel Surveys using Differential GPS" @default.
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