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Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 0 0;"><SPAN>This annual digital ortho effort is implemented and administered by the Loudoun County Office of Mapping and Geographic Information. While primarily developed to capture annual base planimetric, environmental, and topographic updates throughout the County, the backdrop image can also serve as a reference layer for GIS analysis, Computer-aided Dispatching and E-911 services, Staff planning and development, historical record in land use/land cover change, and has the potential for use in many other public service projects. The coordinate system is Virginia State Plane (North), Zone 4501, datum NAD83 HARN. Digital Terrain Models were collected for the purposes of orthorectification. </SPAN><SPAN>Aerial images were acquired using the Vexcel Ultracam mapping camera on March 6, 2023. The digital aerial imagery for the 1-foot resolution orthophotography was collected at an average flying height of ~19,600 feet above sea level. </SPAN><SPAN><SPAN>A full mosaic of all the ortho photos is created in MrSID MG3 format with 22:1 compression ratio.</SPAN></SPAN></P></DIV></DIV></DIV>

Copyright Text: Data was generated for use by Loudoun County and are available to the public. This image data has been developed using procedures designed to produce data to National Standard for Spatial Data Accuracy (NSSDA) and is intended for use at 1:2400 scale or smaller. Acknowledgement of Loudoun County would be appreciated in products derived from this data. Every reasonable effort has been made to assure the accuracy of these data. Loudoun County, Virginia does not assume any liability arising from the use of these data. These data are provided without warranty of any kind, expressed or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular service. Reliance on these data is at the risk of the user.

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