{ "culture": "en-US", "name": "B_W_1996", "guid": "", "catalogPath": "", "snippet": "This digital ortho effort was implemented and administered by the Loudoun County Office of Mapping and Geographic Information. The primary goal was to make this historical imagery available in digital format.\n", "description": "

Loudoun County has collected aerial imagery for many years. While imagery has been captured in digital format since the mid-2000s, prior years were captured with film cameras. Rolls of film from previous years were available at the County in film canisters, but unavailable for viewing on modern digital GIS systems. The County initiated a project to have these film rolls scanned into a digital format. The film was then processed using modern photogrammetric techniques to produce a digital orthomosaic of the County. Images from 1979, 1986, 1988, 1990-2007 were processed and delivered as tiled uncompressed GeoTIFF and MrSID mosaic formats. 1979, 1986, and 1988 were captured and produced as color (R,G,B) images, while the remainder were captured and produced as panchromatic (B/W) images. The MrSID mosaics use a 50:1 compression ratio. Approximate seamline locations containing the scan name attribute have also been provided. The aerial imagery generally encompasses the full land area of the County of Loudoun, VA. Images were flown in varying temporal and ground conditions and will exhibit some variation in tone, quality, and positional accuracy.<\/SPAN><\/P><\/DIV>", "summary": "This digital ortho effort was implemented and administered by the Loudoun County Office of Mapping and Geographic Information. The primary goal was to make this historical imagery available in digital format.\n", "title": "B_W_1996", "tags": [ "Digital Orthophotography", "Land use or land cover", "Emergency management", "Miscellaneous", "Planimetric", "Economic development", "Environment", "Wetlands", "Infrastructure or ground transportation", "Tourism or recreation", "imageryBaseMapsEarthCover" ], "type": "Image Service", "typeKeywords": [ "Data", "Service", "Image Service", "ArcGIS Server" ], "thumbnail": "", "url": "https://agsimage-a1.prod.loudoun.local:6443/arcgis/admin", "minScale": 1.5E8, "maxScale": 5000.0, "spatialReference": "NAD_1983_HARN_StatePlane_Virginia_North_FIPS_4501_Feet", "accessInformation": "\"Digital Orthophotography compiled by Sanborn Map Company, Inc. Colorado Springs, CO\"", "licenseInfo": "

Data was generated for use by Loudoun County and are available to the public. 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.<\/SPAN><\/P><\/DIV>" }