Data Products

No. A photographic enlargement only appears to show more detail than a 9-by-9 inch photograph. Photographic resolution (or image resolution) deteriorates with each enlargement factor.Photographic reproduction of images from the USGS film archives ceased...
YES, Visit our National Geospatial Program page or call 1-888-ASK-USGS for our information package on digital cartographic data. 
That depends on what kind of reprojection you want to do. In some cases, if you want to reproject from one datum to another (specifically NAD 27 to NAD 83, or NAD 83 to NAD 27), a simple x-y shift will suffice. This shift will usually not introduce...
Data are offered as a file or personal geodatabase, but can also be downloaded as a shapefile. NHD is available as a State Extract, in pre-staged subregions, or in a specified extent from the The National Map viewer. 
For the conterminous United States, Hawaii, and the U.S. Virgin Islands, medium and high resolution NHD data are available at 1:100,000 and 1:24,000 scale, respectively. NHD data are available for Puerto Rico at 1:20,000 scale, and at 1:63,360 scale in...
It will probably take approximately 5 years to digitize the archive. A priority scheme is being developed and will be made available to the public at a later date.
Digital elevation model (DEM) data are arrays of regularly spaced elevation values referenced horizontally either to a Universal Transverse Mercator (UTM) projection or to a geographic coordinate system. The grid cells are spaced at regular intervals...
The public may download digital aerial photography products at no cost from the Earth Resources Observation and Science Center (EROS) via EarthExplorer or GloVis.Customers can request a higher resolution aerial or declassified image to be scanned for a $...
The aerial photographs date as far back as the 1940's for the United States and its territories. Availability of specific coverage, film type, and acquisition dates vary from agency to agency.The Earth Resources Observation and Science Center (EROS) in...
We generally emphasize the following four points:a) Select a coordinate system (also called a "position format") you feel comfortable using. We suggest using Universal Transverse Mercator (UTM) or latitude/longitude. Most users find UTM coordinates ...