Efficient position-independent iconic search using an R-theta index.

Charles Ben Cranston Hanan Samet Efficient position-independent iconic search using an R-theta index. 27-34 2006 conf/gis/2006 GIS http://doi.acm.org/10.1145/1183471.1183478 db/conf/gis/gis2006.html#CranstonS06