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Journal of Navigation (CC, SCIE) I. Delikostidis, J. Engel, B. Retsios, C. P .J. M. van Elzakker, M-J. Kraak and J. Döllner: Increasing the usability of pedestrian navigation interfaces by means of landmark visibility analysis, 2013, 4. Journal of Spatial Information Science http://www.josis.org/index.php/josis A. Toomanian, L. Harrie, A. Mansourian, P. Pilesjö: Automatic integration of spatial data in viewing services, 2013, 6. R. E. Roth: Interactive maps: What we know and what we need to know, 2013, 6.