function Utils::GetStationCoverageCargoProduction(stationId, cargoClass) {

    local tileList = AITileList();

    local stationTiles = AITileList_StationType(stationId, AIStation.STATION_ANY);

    local airportTiles = AITileList_StationType(stationId, AIStation.STATION_AIRPORT);

    airportTiles.Sort(AIList.SORT_BY_ITEM, AIList.SORT_ASCENDING);

    local airport_tile = airportTiles.Count() == 0 ? AIMap.TILE_INVALID : airportTiles.Begin();

    for (local tile = stationTiles.Begin(); !stationTiles.IsEnd(); tile = stationTiles.Next()) {

        if (!AIAirport.IsAirportTile(tile)) {

            local type = cargoClass == AICargo.CC_PASSENGERS ? AIStation.STATION_BUS_STOP : AIStation.STATION_TRUCK_STOP;

            local radius = AIStation.GetCoverageRadius(type);

            tileList.AddRectangle(Utils.getValidOffsetTile(tile, -radius, -radius), Utils.getValidOffsetTile(tile, radius, radius));

        } else if (AIMap.IsValidTile(airport_tile) && tile == airport_tile) {

            local type = AIAirport.GetAirportType(tile);

            local radius = AIAirport.GetAirportCoverageRadius(type);

            local width = AIAirport.GetAirportWidth(type);

            local height = AIAirport.GetAirportHeight(type);

            tileList.AddRectangle(Utils.getValidOffsetTile(tile, -radius, -radius), Utils.getValidOffsetTile(AIMap.GetTileIndex(AIMap.GetTileX(tile) + width - 1, AIMap.GetTileY(tile) + height - 1), radius, radius));

        }

    }

    local removeTiles = AITileList();

    for (local remove_tile = tileList.Begin(); !tileList.IsEnd(); remove_tile = tileList.Next()) {

        if (stationTiles.HasItem(remove_tile)) {

            removeTiles.AddTile(remove_tile);

        }

    }

    tileList.RemoveList(removeTiles);

    for (local tile = tileList.Begin(); !tileList.IsEnd(); tile = tileList.Next()) {

        AISign.BuildSign(tile, "x");

    }

    // TODO - how to compute cargo production of each tile in tileList