Imagery

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.
A DRG is a scanned image of a U.S. Geological Survey (USGS) topographic map. The scanned image includes all map collar information. The image inside the map neatline is georeferenced to the surface of the Earth. DRG Fact Sheet  
SDTS transfers are the data sets used to exchange spatial data between different computer systems. SDTS transfers consist of a series of modules (the SDTS's logical grouping of related data) encoded into files using ISO 8211 standard, 'Specification for...
Digital line graph (DLG) data are digital representations of cartographic information. DLG's of map features are digital vectors converted from maps and related sources. The U.S. Geological Survey (USGS) DLG data are classified as large, intermediate,...
The public may download digital aerial photography products at no cost from the Earth Resources Observation and Science Center (EROS). For those who specifically need paper or film products, there is a list of USGS Business Partners who provide aerial...
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...
Landsat 8 carries two push-broom instruments: the Operational Land Imager (OLI), and the Thermal Infrared Sensor (TIRS).The spectral bands of the OLI sensor, while similar to Landsat 7’s ETM+ sensor, provides enhancement from prior Landsat instruments,...
The Landsat 8 and Landsat 7 satellites both maintain a near-polar, sun-synchronous orbit, following the World Reference System (WRS-2). They each make an orbit in about 99 minutes, complete over 14 orbits per day, and provide complete coverage of the...
Landsat 7 ETM+ SLC-off data refers to all Landsat 7 images collected after May 31, 2003, when the Scan Line Corrector (SLC) failed. These products have data gaps, but are still useful and maintain the same radiometric and geometric corrections as data...
The Landsat Program is a series of Earth-observing satellite missions jointly managed by NASA and the U.S. Geological Survey.In 1972, the launch of ERTS-1 (Earth Resources Technology Satellite, later renamed Landsat 1) started the era of a series of...