Geographic Information Science at the Heart of Europe - download pdf or read online

By Falko Schmid, Lutz Frommberger, Cai Cai, Christian Freksa (auth.), Danny Vandenbroucke, Bénédicte Bucher, Joep Crompvoets (eds.)

ISBN-10: 3319006142

ISBN-13: 9783319006147

ISBN-10: 3319006150

ISBN-13: 9783319006154

For the 7th consecutive yr, the AGILE promotes the booklet of a e-book amassing high-level medical papers from unpublished basic clinical study within the box of Geographic info technology. because the time table for Europe 2020 is at present being set, this booklet demonstrates how geographic info technological know-how is on the middle of Europe. The contributions open views for cutting edge companies that might enhance our eu financial system, and to be able to tell electorate approximately their surroundings whereas protecting their privateness. the newest demanding situations of spatial info infrastructures are addressed, comparable to the relationship with the internet vocabularies or the illustration of family tree. consumer generated info (through social networks or via interactive cameras and software program) is additionally a massive step forward in our area. A development to deal a growing number of with time, occasions, historic info, a nd actions is visible this 12 months to boot. This quantity collects the 23 most sensible complete papers offered through the sixteenth AGILE convention on Geographic details technological know-how, held among 14 and 17 may well 2013 in Leuven, Belgium.

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2 Features with at least 6 versions highlighted • Versions. As pointed out above, more versions essentially mean more provenance information to analyze. At the same time, they indicate that the feature has undergone a certain number of iterations with the goal to improve the feature’s quality. We therefore assume that a higher version number adds to the feature’s trustworthiness. • Users. A higher number of users involved in creating a feature increases the trust measure, following the many eyes principle.

28 C. Keßler and R. T. A. de Groot Fig. 1 Thematic Accuracy and Topological Consistency During the field survey, all selected features have been inspected on site, pictures were taken, and, if possible, people were asked to confirm the feature type in consideration to minimize bias. The following components were examined during this survey and are listed here in the order of higher to lesser importance regarding its influence on the quality of the thematic accuracy: 1. g. is this place a restaurant or a café?

However, due to the large number of potential feature types, the wiki does not provide lists of tags that should be provided for a certain type in order to provide complete information. We therefore had to come up with a method that determines importance of a specific tag for a given feature type. Based on the term frequency—inverse distance frequency measure (tf-idf) (Salton et al. 1975) that measures how characteristic a specific term is for a given document, we have defined an inverse feature type frequency (iff).

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Geographic Information Science at the Heart of Europe by Falko Schmid, Lutz Frommberger, Cai Cai, Christian Freksa (auth.), Danny Vandenbroucke, Bénédicte Bucher, Joep Crompvoets (eds.)

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