Africa Mask (White)

<div style='text-align: left;'><p style=''><span style='font-size: 16px;'>This vector tile layer provides a buffered mask around an area of interest (AOI), in this case Africa.  The layer can be overlayed on other basemaps and operational layers to call attention to the AOI within the mask. This layer is opaque and designed for light basemap.</span><br /></p><p style=''>The layer is a vector tile layer so it is designed to (a) perform well at multiple scale levels and (b) be customized as needed to work well with other basemaps or layers.  The vector tile layer can be added to the basemap layer of a web map and set as a reference layer, if needed, to mask other reference layers in the map.</p></div>

本矢量瓦片图层（vector tile layer）可在感兴趣区域（Area of Interest，简称AOI）周边生成缓冲遮罩，本次示例的感兴趣区域为非洲大陆。该图层可叠加至其他底图与业务图层之上，用于突出遮罩范围内的感兴趣区域。本图层为不透明样式，适配浅色底图使用。
作为矢量瓦片图层，本图层具备两大设计特性：其一，可在多种缩放级别下保持优异性能；其二，支持按需自定义配置，可与其他底图或图层完美适配。如需将本矢量瓦片图层添加至Web地图的底图图层中并设为参考图层，即可对地图内的其他参考图层实现遮罩效果。