30 July 2002 Visualization of spatio temporal GPS uncertainty within a GIS environment
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Abstract
The importance of accurate registration of GPS (Global Positioning System) tracked objects embedded within a GIS (Geographic Information Systems) context has emerged as a critical need in several land, marine, and air navigational systems both for civilian and defense applications. The object of this work is to measure, model and geo-spatially register the positional accuracy of objects carrying GPS receivers against a GIS background. Although positional accuracy is affected by a number of factors, in this work we have focused on GPS modes (standalone or differential), type of environment (urban or foliage), and type of expected movement of objects. The Ashtech Z-12 sensor is used to collect the data. Linear models are used to estimate the errors associated with the horizontal position information. This error is then visualized upon a `1/2 foot resolution aerial imagery of the UCSC (University of California, Santa Cruz) campus. Estimates of speed and direction errors are used to create visualizations of spatio-temporal uncertainty associated with an object walking through the campus.
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Suresh Kumar Lodha, Suresh Kumar Lodha, Amin P. Charaniya, Amin P. Charaniya, Nikolai Faaland, Nikolai Faaland, Srikumar Ramalingam, Srikumar Ramalingam, } "Visualization of spatio temporal GPS uncertainty within a GIS environment", Proc. SPIE 4744, Radar Sensor Technology and Data Visualization, (30 July 2002); doi: 10.1117/12.488302; https://doi.org/10.1117/12.488302
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