@PostMapping(value = "/transactionmetadata")
    public TransactionMetaDataViewModel postTransactionMetadata(@RequestParam Map<String, String> requestParam) {
        final List<GetTraceInfo> selectTraceInfoList = this.getTraceInfoParser.parse(requestParam);

        if (CollectionUtils.isEmpty(selectTraceInfoList)) {
            return new TransactionMetaDataViewModel();
        }

        final List<SpanBo> metadata = scatter.selectTransactionMetadata(selectTraceInfoList);
        return new TransactionMetaDataViewModel(metadata);
    }
selected points from scatter chart data query

@param requestParam requestParam
@return TransactionMetaDataViewModel
web/src/main/java/com/navercorp/pinpoint/web/authorization/controller/ScatterChartController.java