Feature Tile Assignment

In many cases, map feature geometries can span across multiple tiles, based on the feature. For example, long linear features such as rivers or railroad or large polygons as natural parks, or municipality boundaries.

When features span across multiple tiles, the feature is only included in one of the many tiles its geometry traverses. By convention, the tile the feature is associated to is the tile where its southern/western most shape point is located.

In the examples below on the left, two linear features span across multiple tiles, one having its southernmost point in the bottom right tile (left picture), the other having its southernmost point which is further west on the bottom left tile. These features will be included in the corresponding reference tile per convention, respectively tile 24319677 and tile 24319676.

In these other examples, two polygonal features span across multiple tiles, one having its southernmost point in the top left tile (left picture), the other having its southernmost point in the bottom left tile. These features will be included in the corresponding reference tile per convention, respectively tile 24319678 and tile 24319676.

In the real-life example below, the highlight polygon is associated with tile 24319671, as the polygon geometry has its southernmost shape point in this tile.