Loudoun Imagery 2015

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 2015, the imagery was captured with a Vexcel Ultracam 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).更多元数据信息：弗吉尼亚州劳登县（Loudoun County）每年春季都会采集无叶期（leaf-off）航空影像。自2004年起，该县便依托此类影像构建年度数字正射影像基础数据集。2015年的影像采用Vexcel Ultracam数码相机采集，格式为4波段（红(R)、绿(G)、蓝(B)及近红外(NIR)）。此类文件为采用地理标记图像文件格式（GeoTIFF）6.0版本存储的4波段正射校正航空影像地图产品，地面分辨率达1英尺，色彩深度为8位。GeoTIFF文件属于未压缩栅格影像，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。所有影像均采集于无叶期，单幅尺寸为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络，Virginia Geographic Information Network）进行分幅。