1. A method of identifying associations between a plurality of map tiles and a geometry, the map tiles defined as a tile tree comprising the plurality of tiles at a plurality of parent-child hierarchical levels, the plurality of tiles comprising (i) a root tile having a plurality of child tiles and no parent tile, (ii) a plurality of leaf tiles, each leaf tile having only one parent tile and no child tiles, and (iii) a plurality of intermediate tiles having only one parent tile and a plurality of child tiles, the method comprising: at a first processing unit of a plurality of parallel processing units: receiving a description of the geometry and an identification of a tile in the plurality of tiles; determining whether the tile intersects the geometry; and when the tile intersects the geometry and has child tiles, storing a description of a plurality of tasks for determining whether a portion of the geometry intersects any of the child tiles of the tile, the description of each task comprising a description of the portion of the geometry that intersects the tile and an identification of a child tile of the tile; and at a second processing unit of a plurality of parallel processing units: receiving a description of a task comprising the description of a portion of the geometry and the identification of a particular child tile of the tile; determining whether the particular child tile intersects the portion of the geometry; and when the particular child tile intersects the portion of the geometery and has child tiles, storing a description of a plurality of tasks for determining whether a portion of the geometry portion that intersects the particular child tile intersects any of the child tiles of the particular child tile, the description of each task comprising a description of the portion of the geometry portion and an identification of a child tile of the particular child tile, each defined task assignable to a processing unit in the plurality of parallel processing units to determine whether the portion and the tile described for the task intersect.