Loudoun Imagery 2013

More Metadata In the spring of 2013, the Commonwealth of Virginia, through the Virginia Geographic Information Network Division (herein referred to as VGIN) of the Virginia Information Technologies Agency (VITA) contracted with the Sanborn Map Company to provide aerial data acquisition, ground control, aerial triangulation and development of statewide DTM and digital orthophotography data. The Virginia Base Mapping Program (VBMP) update project is divided into two collection phases: the Eastern half was collected in Spring 2013 and the Western half will be collected in Spring 2015. Ortho products are 1-foot resolution statewide ortho-imagery with upgrades to 6-inch resolution tiles and 3-inch resolution tiles in various regions within the project area. All data acquired in 2013 is jurisdiction based and is in the eastern half of the state. The Virginia Base Mapping project encompasses the entire land area of the Commonwealth of Virginia over 4 years. "Imagery Courtesy of the Commonwealth of Virginia"更多元数据：2013年春季，弗吉尼亚联邦通过弗吉尼亚信息技术局（Virginia Information Technologies Agency, VITA）下属的弗吉尼亚地理信息网络分部（Virginia Geographic Information Network Division, VGIN，下称VGIN），与桑伯恩地图公司（Sanborn Map Company）签订合同，委托其开展航空数据采集、地面控制测量、空中三角测量，以及全州数字地形模型（DTM）与数字正射影像数据的开发工作。弗吉尼亚基础测绘项目（Virginia Base Mapping Program, VBMP）更新工程分为两个采集阶段：东部片区于2013年春季完成数据采集，西部片区计划于2015年春季开展采集。正射影像产品初始为1英尺分辨率的全州正射影像，并针对项目区内多个区域分别升级为6英寸分辨率瓦片与3英寸分辨率瓦片。2013年获取的全部数据均以辖区为单位进行组织，覆盖该州东部全域。弗吉尼亚基础测绘项目耗时四年，涵盖弗吉尼亚联邦全部陆地国土。"影像由弗吉尼亚联邦提供"