ArcIMS Web Map Service: USGS_EDC_National_Atlas

The USGS TNM_Large_Scale_Imagery_Overlay service from The National Map contains outlines of the current orthoimagery holdings available in the TNM_Large_Scale_Imagery service. The outline data is for the 1_meter_imagery layer and the 1_foot_imagery layer, and is viewable at all scales.

ArcIMS Web Map Service: USGS_EDNA

NLCD 1992, NLCD 2001, and NLCD 2006 are National Land Cover Database classification schemes based primarily on Landsat data along with ancillary data sources, such as topography, census and agricultural statistics, soil characteristics, wetlands, and other land cover maps. NLCD 1992 is a 21-class land cover classification scheme that has been applied consistently across the conterminous U.S. at a spatial resolution of 30 meters. NLCD 2001 is a 16-class land cover classification scheme that also has been applied to the conterminous U.S. at a spatial resolution of 30 meters, and includes Alaska, Hawaii, and Puerto Rico. NLCD 2006 quantifies land cover change for the conterminous U.S. between the years 2001 to 2006. Generation of NLCD 2006 helped identify and correct issues in the NLCD 2001 land cover and impervious surface products only, and no changes were made to the NLCD 2001 canopy product. For additional information, go to http://www.mrlc.gov/.

ArcIMS Web Map Service: USGS_EDC_Elev_NED_9

TNM Large Scale Shaded Relief is a dynamic service that contains shaded relief elevation layers derived from the National Elevation Dataset (NED). The NED was developed by merging the highest resolution, best-quality elevation data available across the United States into a seamless raster format. Large scale shaded relief represents NED data with horizontal grid spacings of 1/3 arc-second (approximately 10 meters) and 1/9 arc-second (approximately 3 meters) as if it were a surface illuminated by a light source 45 degrees above the northwest horizon. Small scale shaded relief can be viewed at scales of 1:289,000 and larger in The National Map Viewer. Go to http://ned.usgs.gov/ and http://extract.cr.usgs.gov/distmeta/servlet/gov.usgs.edc.MetaBuilder?TYPE=HTML&DATASET=NED13 for more information on 1/3 arc-second NED.

ArcIMS Web Map Service: world

ArcIMS Web Map Service: USGS_EDC_ShadedRelief_NED_9

WMS

NLCD 1992, NLCD 2001, and NLCD 2006 are National Land Cover Database classification schemes based primarily on Landsat data along with ancillary data sources, such as topography, census and agricultural statistics, soil characteristics, wetlands, and other land cover maps. NLCD 1992 is a 21-class land cover classification scheme that has been applied consistently across the conterminous U.S. at a spatial resolution of 30 meters. NLCD 2001 is a 16-class land cover classification scheme that also has been applied to the conterminous U.S. at a spatial resolution of 30 meters, and includes Alaska, Hawaii, and Puerto Rico. NLCD 2006 quantifies land cover change for the conterminous U.S. between the years 2001 to 2006. Generation of NLCD 2006 helped identify and correct issues in the NLCD 2001 land cover and impervious surface products only, and no changes were made to the NLCD 2001 canopy product. For additional information, go to http://www.mrlc.gov/.