Prairie Rose Lake Boundary (polygon) - Edge of water at lake-surface elevations, 1227.9 ft above NAVD 88 for the main lake and 1229.6 ft above NAVD 88 upstream of the siltation dam

These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This data set consists of a digital polygon coverage that defines the shoreline of Prairie Rose Lake in Shelby Co., Iowa. The U.S. Geological Survey conducted a bathymetric survey of Prairie Rose Lake in 2004.

这些数据的发布时间早于2016年10月1日——该日期为美国地质调查局（U.S. Geological Survey, USGS）科学数据审核、批准与发布政策的生效日期，该政策详见《美国地质调查局勘测手册第502.8章：基础科学实践：科学数据发布的审核与批准》。本数据集包含一套数字化多边形覆盖数据，用于界定爱荷华州谢尔比县草原玫瑰湖（Prairie Rose Lake）的湖岸线。美国地质调查局于2004年对草原玫瑰湖开展了水深测量作业。