Tile source that directs tile requests to different tile sources depending on the zoom level
Scenario: There are two different tile sources, one with the low-zoom earth imagery, and another with the detailed vector-based high-zoom data. Demultiplexer would allow us to return low zoom tiles (e.g. before zoom 6) from one source, and high zoom tiles from another.
storeLow:
uri: cassandra://...
storeHigh:
uri: cassandra://...
mix:
uri: demultiplexer://
params:
source1: {ref: storeLow}
from1: 0
before1: 6
source2: {ref: storeHigh}
from2: 6
before2: 18
fromN is inclusive, beforeN is exclusive. Configuration must specify a non-duplicate source for every zoom level between minimum and maximum, but minimum may be non-zero.