# 6.4 向量圖磚

向量圖磚是近幾年WebGIS發展的趨勢，它雖然不是OGC標準，不過已相繼被主流GIS產品或網站所採用，例如：Google地圖、Open Street Map、ESRI ArcGIS Enterprise...。傳統的地圖圖磚是以影像為儲存單元（jpg或png），將各比例尺的地圖畫面以預處理的方式全部跑過一遍；向量圖磚則是儲存 GeoJSON 格式，適用情境為向量資料的地圖服務，其主要的優點有：可自行定義地圖樣式、儲存空間較小（相較於影像圖磚而言）。此外，由於向量圖磚採用WebGL的渲染技術（rendering），因此在文字註記部分可有較佳的呈現效果（如文字圓滑度、文字旋轉...等），可使文字及圖示永遠維持正向，如以下動畫。

![](/files/-MVzSoBQaKlZAhN5xb_E)


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