2009 Lake County Aerial - SW Quarter

This six inch pixel resolution color aerial photography was flown between May 9, 2009 and May 26, 2009. The files are provided in JPEG2000, an open format supported by most GIS and CAD software packages. Its intended usage for viewing is 1" = 100. The photography has been orthorectified to meet National Map Accuracy Standards for its capture scale. The images are georeferenced to the Illinois State Plane, Eastern Zone, using the NAD83 NSRS2007 horizontal datum. The data set is tiled for dissemination into many separate tiles, each of which is 2500 feet on a side.

本数据集为6英寸像素分辨率彩色航空摄影影像，拍摄时段为2009年5月9日至2009年5月26日。数据文件采用JPEG2000格式存储，该格式为开源标准，可被绝大多数地理信息系统（GIS）与计算机辅助设计（CAD）软件兼容支持。本影像的推荐浏览比例尺为1英寸对应100英尺。该航空影像已完成正射校正，以符合其拍摄比例尺对应的国家地图精度标准。本影像采用NAD83 NSRS2007水平基准面，完成地理配准至伊利诺伊州平面坐标系东带。本数据集已拆分为多个独立分块以方便分发，每个分块的边长为2500英尺。