Loudoun Imagery 2019

More Metadata Loudoun County annually obtains leaf-off, aerial imagery in the spring. Since 2004, the County has utilized this imagery to support the development of an annual digital orthophoto base. In 2019, the imagery was captured with a Z/I DMCIIe 230 digital camera, in 4-band (R,G,B, and NIR) format. These files contain 1-foot ground-resolution, 8-bit, 4-band orthorectified aerial image map products in GeoTIFF version 6.0 file format. GeoTIFF files are uncompressed raster images complete with TFW coordinate information. The aerial imagery project encompasses the entire land area of the County of Loudoun, VA. Images were flown during leaf-off conditions and cover 5000' by 5000' and are tiled according to the VBMP 200-scale gridding schema (Virginia Geographic Information Network). "March 2019 Photography flown by the Sanborn Map Company, Colorado Springs, CO." "Digital Orthophotography compiled by Sanborn Map Company, Colorado Springs, CO"附加元数据：劳登县（Loudoun County）每年春季都会采集落叶期航空影像。自2004年起，该县便利用此类影像构建年度数字正射影像底图。2019年的影像采用Z/I DMCIIe 230数码相机采集，格式为4波段（红、绿、蓝及近红外）。该数据集包含地面分辨率1英尺、8位色深的4波段正射校正航空影像制图产品，存储格式为GeoTIFF 6.0版本。GeoTIFF文件为未压缩栅格影像，附带TFW坐标信息。本次航空影像项目覆盖弗吉尼亚州劳登县全境陆地范围。影像采集于落叶期，单幅影像幅面为5000英尺×5000英尺，并按照VBMP 200级网格划分方案（弗吉尼亚地理信息网，Virginia Geographic Information Network）进行分幅。"2019年3月航空摄影由科罗拉多州科罗拉多斯普林斯的桑伯恩地图公司（Sanborn Map Company）执行。" "数字正射影像产品由科罗拉多州科罗拉多斯普林斯的桑伯恩地图公司（Sanborn Map Company）编制。"