US Geological Survey Large Scale Orthoimagery Map Service - Orthoimagery data are typically high resolution aerial images that combine the visual attributes of an aerial photograph with the spatial accuracy and reliability of a map. Digital orthoimage resolution may vary from 6 inches to 1 meter. In the former resolution, every pixel in an orthoimage covers a six inch square of the earth’s surface, while in the latter resolution, one meter square is represented by each pixel. The majority of the large scale imagery service source for scales larger than 1:289,000 is from the National Agriculture Imagery Program (NAIP) for the conterminous United States (CONUS). The data is 1-meter pixel resolution with leaf-on. Collection of NAIP imagery is administered by the U.S. Department of Agriculture's Farm Service Agency, and assured for quality by the USGS. The National Map also has higher resolution imagery that is commonly 1-foot resolution or better, and was acquired through partnerships with the National Geospatial-Intelligence Agency, and other State and local cooperating agencies. This imagery data is available in urban areas and along borders, and may be viewed at scales of 1:13,500 and larger in the viewer. The National Map program is working on acquisition of large scale imagery for the nonconterminous States of Alaska and Hawaii. Large scale orthoimagery can be downloaded through The National Map Viewer at http://viewer.nationalmap.gov/viewer/.View Full FGDC Metadata from geo.data.govWMS Link: http://raster.nationalmap.gov/ArcGIS/services/TNM_Large_Scale_Imagery/MapServer/WMSServer?request=GetCapabilitiesservice=WMS