NEW GEOMETRIC SOLUTIONS FOR WEB MAP TOPONYM PLACEMENT

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-12-4 / ISSN 1314-2704, June 19-25, 2014, Book 2, Vol. 3, 769-776 pp

ABSTRACT
The paper gives an overview and proposes solutions regarding to the most common mistakes for toponym placement for the best known and most-used web maps and GIS services where toponym placement is not harmonized with the cartographic principles, cartographic visualization conditions or cartographic generalization rules. The problem is solved by use of geometry where toponyms or toponym letters are approximated with a rectangle and/or with a rhombus for italic letters. In the end, we introduce the concept of predicting the path along which a toponym label can be placed through a simple geometry test for intersections of lines and rectangles. Approximations of words or single letters of a word with rectangles or rhombuses is offered as a simple solution for web map label placement calculations in real time which makes it convenient for web maps.

Keywords: Toponym; Placement; Web map; Collision; Overlap