在網頁瀏覽器中互動探索三維大氣資料，必須在有限的運算資源下同時協調資料檢索、網路傳輸、瀏覽器記憶體、幾何生成與渲染，因此仍具挑戰性。本研究與國家災害防救科技中心合作，提出一套瀏覽器式、具地理參考的風場與雷達資料視覺化系統。系統在共同的地理座標框架中，整合三維風場流線與由使用者指定之雷達反射率垂直剖面，並不要求瀏覽器直接載入或渲染完整雷達體積。 為降低不必要的資料存取，本研究將大氣資料切分為空間資料區塊，並組織成具有空間、時間與解析度中繼資料的多解析度索引紀錄。系統依據目前地圖視埠所涵蓋的範圍，在網路傳輸前選取所需的空間與時間紀錄，再由瀏覽器完成資料解碼、流線生成、雷達剖面幾何建構與地理對位渲染。此外，本研究在受控的瀏覽器工作負載下評估一組預先定義的視覺化與取樣參數，並以最低量測互動延遲選取保留的操作設定，同時報告其瀏覽器記憶體使用量。 在本研究的實驗環境中，所提出的流程將完整資料範圍基準的互動延遲由 3552 毫秒降低至 9.8 毫秒，渲染迴圈速率由 11.5 FPS 提升至 134.0 FPS，JavaScript heap 使用量則由 552 MB 降低至 56 MB。代表性的視埠查詢僅傳輸 2 個風場資料區塊、共 1.05 MiB，相較完整 LOD0 風場資料的 48 個區塊與 24.20 MiB，資料量約降低 95.67%。在保留設定 C12 的 30 次大範圍平移測試中，視埠更新平均延遲為 71.6 毫秒，P95 為 79.1 毫秒，最大值為 82.1 毫秒；上述數值不包含地圖移動結束後的 120 毫秒 debounce。結果顯示，以視埠為索引的資料存取與地理對位渲染，可在受測條件下支援區域性大氣資料的低延遲網頁互動探索。;Interactive exploration of three-dimensional atmospheric data in web browsers is challenging because data retrieval， network transfer， browser memory， geometry generation， and rendering must be coordinated under limited computational resources. We present a browser-based visualization system developed in collaboration with Taiwan’s National Science and Technology Center for Disaster Reduction (NCDR) to address requirements for geographically contextualized exploration of wind and radar data. The system provides a complementary three-dimensional view that co-registers wind streamlines and user-defined radar-reflectivity vertical cross-sections within a common geographic reference frame， without requiring direct full-volume rendering in the browser. Atmospheric datasets are partitioned into spatial chunks and organized as metadata-indexed multiresolution records. A viewport-driven region-of-interest strategy selects the spatial and temporal records required for the current map view before network transmission. We further evaluate a predefined set of visualization and sampling configurations and retain the configuration with the lowest recorded interaction latency while reporting its browser-memory usage. In the evaluated environment， the proposed pipeline reduces the recorded interaction latency of the full-domain baseline from 3552 ms to 9.8 ms. The rendering-loop rate increases from 11.5 to 134.0 frames per second， while JavaScript heap consumption decreases from 552 MB to 56 MB. A representative viewport request transfers 1.05 MiB from two wind chunks， compared with 24.20 MiB from 48 chunks for the complete LOD0 wind domain. For the retained configuration， the measured viewport-update latency has a mean of 71.6 ms， a P95 of 79.1 ms， and a maximum of 82.1 ms over 30 large-pan trials; these values exclude the 120 ms debounce interval. These results demonstrate the technical feasibility of viewport-indexed data access and geographically co-registered rendering for interactive， browser-based exploration of regional atmospheric datasets.
