Skobbler card clustering
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Unfortunately, there is no clustering support for SKAnnotations (you will need to implement logic to select which annotations are visible at each zoom level).
Note. clustering support for SKAnnotes is a work in progress
SKPoiCluster will be used with SKMapPoi . (SKMapPoi offers clustering support) The tradeoff for SKMapPoi is that the icons used are quite limited - sprites from a png file, so if you want to change the icon you need to change the png file.
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