USA State Plane Zones NAD 1927

U.S. State Plane Zones (NAD 1927) represents the State Plane Coordinate System (SPCS) zones for the North American Datum of 1927 in the United States. Several SPCS zones are not shown in this dataset, including Puerto Rico, the U.S. Virgin Islands, American Samoa, Guam, and Louisiana's offshore zone. Esri created this dataset from several sources in 1997: Extracted state boundaries from ArcUSA 1:25M. Created state plane boundaries based on a graphic in the article, "A National Reference System and its Relationship to Mapping" by Alden P. Colvocoresses at the U.S. Geological Survey (USGS), and John P. Snyder's "An Album of Map Projections: A Working Manual" (1987: USGS Professional Paper 1395. U.S. Government Printing Office: Washington, D.C.). To download the data for this layer as a layer package for use in ArcGIS desktop applications, refer to USA State Plane Zones.美国州平面坐标系分区（NAD 1927）指代美国境内基于1927年北美基准面的州平面坐标系（State Plane Coordinate System，SPCS）分区。本数据集未收录部分SPCS分区，包括波多黎各、美属维尔京群岛、美属萨摩亚、关岛及路易斯安那州近海分区。Esri于1997年通过多源渠道构建本数据集：从1:2500万比例尺ArcUSA数据集中提取州界；参考美国地质调查局（U.S. Geological Survey，USGS）Alden P. Colvocoresses发表的论文《国家参考系统及其与制图的关系》中的配图，以及John P. Snyder所著《地图投影图集：工作手册》（1987年，美国地质调查局专业报告1395号，美国政府印刷局：华盛顿特区）绘制州平面边界。若需下载可用于ArcGIS桌面应用的该图层数据包，请参阅"USA State Plane Zones"。