Geology of North America

This layer maps the geology of North America, Central America, and portions of the Pacific and Atlantic Oceans symbolized by geologic time. The data used to create this layer was the Geology Units layer described in the publication: Garrity, C.P., and Soller, D.R., 2009, Database of the Geologic Map of North America; adapted from the map by J.C. Reed, Jr. and others (2005): U.S. Geological Survey Data Series 424 The field used for symbolgy (Esri Symbology) was created from the Maximum Age field. Time prefixes were removed and other changes made to the values to simplify the symbology. Colors were taken from the Geologic Society of America's Geologic Time Scale. Prior to publication geometry errors were repaired and the data were projected into Web Mercator. Dataset Summary Phenomenon Mapped: Geology Coordinate System: Web Mercator Auxiliary Sphere Extent: North America, Central America, and portions of the Pacific and Atlantic Oceans Visible Scale: All Scales Source: Database of the Geologic Map of North America Publication Date: 2009 Attributes Attributes included in this layer include: Rock Type Lithology Minimum Age Maximum Age Unit Uncertainty Age Uncertainty Map Notes What can you do with this layer? This layer can be used throughout the ArcGIS system. Feature layers can be used just like any other vector layer. You can use feature layers as an input to geoprocessing tools in ArcGIS Pro or in Analysis in ArcGIS Online. Combine the layer with others in a map and set custom symbology or create a pop-up tailored for your users. For the details of working with feature layers the help documentation for ArcGIS Pro or the help documentation for ArcGIS Online are great places to start. The ArcGIS Blog is a great source of ideas for things you can do with feature layers. This layer is part of ArcGIS Living Atlas of the World that provides an easy way to find and explore many other beautiful and authoritative layers, maps, and applications on hundreds of topics.本图层以地质年代为符号编码依据，绘制了北美、中美洲以及太平洋和大西洋部分海域的地质分布。本图层所用数据来自以下文献中所述的地质单元图层（Geology Units layer）：Garrity, C.P. 及 Soller, D.R. 于2009年刊发的《北美地质图数据库》，该数据改编自J.C. Reed Jr.等人2005年编制的地图，收录于美国地质调查局数据系列424（U.S. Geological Survey Data Series 424）。 用于符号化（Esri Symbology）的字段由最大年龄字段（Maximum Age field）构建：通过移除时间前缀并调整部分属性值以简化符号表达。配色方案取自美国地质学会的地质年代表。正式发布前，已完成数据几何误差修正，并将其投影至Web Mercator坐标系。 数据集摘要 制图对象：地质（Geology） 坐标系：Web Mercator辅助球体（Web Mercator Auxiliary Sphere） 覆盖范围：北美、中美洲以及太平洋和大西洋部分海域 可见比例尺：全比例尺 数据源：北美地质图数据库 发布日期：2009年 属性信息 本图层包含以下属性字段：岩石类型（Rock Type）、岩性（Lithology）、最小年龄（Minimum Age）、最大年龄（Maximum Age）、单元不确定性（Unit Uncertainty）、年龄不确定性（Age Uncertainty）以及制图备注（Map Notes）。 本图层的应用场景 本图层可在全ArcGIS生态系统中使用。要素图层（Feature layers）的使用方式与其他矢量图层一致：可作为输入数据用于ArcGIS Pro或ArcGIS Online的地理处理工具中；可与其他图层组合制图，自定义符号系统，或为用户定制弹窗信息。若需了解要素图层的详细操作方法，可参考ArcGIS Pro或ArcGIS Online的官方帮助文档；ArcGIS博客（ArcGIS Blog）也提供了大量要素图层的应用创意案例。 本图层隶属于ArcGIS世界生活地图集（ArcGIS Living Atlas of the World），该图集可帮助用户便捷查找和探索数百个主题下的大量优质权威图层、地图及应用程序。