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GI_Forum 2013, Volume 1Creating the GISociety – Conference Proceedings
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Verlag der Österreichischen Akademie der Wissenschaften Austrian Academy of Sciences Press
A-1011 Wien, Dr. Ignaz Seipel-Platz 2
Tel. +43-1-515 81/DW 3420, Fax +43-1-515 81/DW 3400 https://verlag.oeaw.ac.at, e-mail: verlag@oeaw.ac.at |
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DATUM, UNTERSCHRIFT / DATE, SIGNATURE
BANK AUSTRIA CREDITANSTALT, WIEN (IBAN AT04 1100 0006 2280 0100, BIC BKAUATWW), DEUTSCHE BANK MÜNCHEN (IBAN DE16 7007 0024 0238 8270 00, BIC DEUTDEDBMUC)
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GI_Forum 2013, Volume 1, pp. 169-176, 2013/06/20
Creating the GISociety – Conference Proceedings
A trajectory represents an object’s path through space and time. These trajectories are often recorded as a series of spatial positions at discrete time intervals. Depending on the sampling rate employed, there can be a large amount of uncertainty relating to how well the trajectory represents the actual path taken. By using the concept of error ellipses, an adaptive sampling strategy has been developed that allows for the determination of an optimal sampling rate whilst ensuring that a pre-defined uncertainty threshold is not surpassed. This decreasing of uncertainty means that any trajectory derived using the algorithm presented would closely match the actual route taken by the object, thus allowing for more accurate spatial interpretation of the data.