WaterClass wc1 = IsWaterTile(tile) ? GetWaterClass(tile) : WATER_CLASS_CANAL;

 

    if (!IsWaterTile(tile)) {

        ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);

        if (ret.Failed()) return ret;

        cost.AddCost(ret);

        cost.AddCost(_price[PR_BUILD_CANAL]);

    } else {

        if (wc1 == WATER_CLASS_CANAL && !IsTileType(tile, MP_INDUSTRY) && GetTileOwner(tile) != OWNER_NONE) {

            ret = CheckTileOwnership(tile);

            if (ret.Failed()) return ret;

        }

    }