Available filter for a layer are defined by filter definition in location infoj array.

By defining a filter infoj array in the layer entry it is possible to create aggregates from a set of filters which are active on the layer.

"filter": {
"label": "ID count",
"field": "id_count",
"type": "integer",
"inline": true,
"fieldfx": "count(retailpoint_id)"

Using the fieldfx capabilities it is possible to aggregate counts or sums for the items which pass through the layers filter.

The aggregate location is temporary.