mapbox/mapbox-ios-sdk — pull request #271 by wibge (2013-07-10 19:26:23+00:00)
Title: fixed Y span in RMCoordinateGridSource. Latitude is not linearly increas...

fixed Y span in RMCoordinateGridSource. Latitude is not linearly increasing across each tile, so lines were drawn slightly off. Calculated gridline offset using projected points instead.