Tile Based Loading Strategy

This is the simplest strategy in both terms of ease of use and operation. No parameters need to be defined.

The Tile based loading strategy takes the layers which observe the overlap factor rule, and chooses the layer which would use the largest number of tiles, but not more than 9, to display the required view.

For a simple map with a single Layer Stack, as the view zooms in, we descend through the stack.

Layer 0 is chosen

Layer 1 is chosen

Layer 2 is chosen

Note:

1. Because rasters are included in Layers as extra underlaid tiles, they break the uniformity of the tile grid. Tile based strategies will therefore not work if the Layer includes rasters.
2. The Tile Based Strategy can not be used if the map is created for runtime projection.