Countries of North America_filter layer DEMO

This GIS data layer is sourced from World Countries available in the ArcGIS Living Atlas of the World, filtered to North America (ArcGIS Online itemID ac80670eb213440ea5899bbf92a04998). It is updated automatically from its source data. See the source item for the most current description. World Countries provides a detailed basemap layer for the world's country boundaries. It has been designed to be used as a basemap and includes a fields for local and official names and country codes, along with capital, continent, and display fields. Particularly useful are the LAND_TYPE and LAND_RANK fields that separate polygons based on their size. These fields are helpful for rendering at different scales by providing the ability to turn off small islands that may clutter small-scale views.本GIS数据图层源自全球ArcGIS在线生活地图集（ArcGIS Living Atlas of the World）中的「世界国家」数据集，经筛选后仅保留北美区域（ArcGIS Online 项目ID：ac80670eb213440ea5899bbf92a04998）。该图层将自动从源数据更新，如需获取最新完整说明，请查阅源项目页面。「世界国家」数据集为全球国家边界提供了高精度底图图层，其设计定位为充当底图，包含本地名称、官方名称、国家代码，以及首都、所属大洲与显示相关的属性字段。尤为实用的是LAND_TYPE（土地类型）与LAND_RANK（土地等级）字段，可依据多边形的面积对其进行分类。借助这两个字段，用户可在不同比例尺下隐藏可能干扰小比例尺视图显示的小型岛屿，从而优化渲染效果。