Derived Land Remote Sensing Image Product README
Remote Sensing Image Gallery
U.S. Geological Survey
Revised Date: May 2013

TABLE OF CONTENTS
INTRODUCTION
PART 1:  USGS LAND REMOTE SENSING DERIVED IMAGE PRODUCT POINTS OF CONTACT
PART 2:  CONTENTS OF THE LARGE IMAGE DOWNLOAD
PART 3:  CONTENTS OF THE MEDIUM IMAGE DOWNLOAD
PART 4:  CONTENTS OF THE SMALL IMAGE DOWNLOAD
PART 5:  VIEWING REMOTE SENSING DERIVED IMAGES 
PART 6:  LEVEL 1T DATA

INTRODUCTION
This derived image product was created by the U.S. Geological Survey (USGS). The image represents one of a variety of land remote sensing derived image information products that are produced for educational and reference purposes rather than for scientific interpretation.  The images have been geotagged BUT have not been georeferenced and do not contain map projection or datum information. Many slideshow images produced prior to 5/01/2013 were created using an old process and will not have the same metadata and capabilities available with the newer products.
 
PART 1:  USGS NATIONAL LAND IMAGING DERIVED IMAGE PRODUCT POINTS OF CONTACT
Images may be downloaded or accessed from the USGS NLI Image Collection Web site: 
https://remotesensing.usgs.gov/gallery/image_collections

USGS Contact

Customer Services 
U.S. Geological Survey
Earth Resources Observation and Science (EROS) Center
Sioux Falls, SD 57198-0001  
Email: custserv@usgs.gov 

Information about other USGS products can be found online:  
http://eros.usgs.gov or http://www.usgs.gov

PART 2:  CONTENTS OF THE LARGE DERIVED IMAGE DOWNLOAD  
The root directory of this product has one zip file that contains the original derived image(s), in a Tagged Image File Format (TIFF) format and a README file. The image(s) contained in this download will average around 2010 pixels wide with 150 pixels per inch resolution. 

PART 3:  CONTENTS OF THE MEDIUM IMAGE DOWNLOAD
The root directory of this product has one zip file that contains the image(s), in a Joint Photographic Experts Group (JPEG) format and a README file.  The image(s) contained in this download will range from 1200-1600 pixels wide with 72 pixels per inch resolution. 

PART 4:  CONTENTS OF THE SMALL IMAGE DOWNLOAD
The root directory of this product has one zip file that contains the image(s), in a Joint Photographic Experts Group (JPEG) format and a README file.  The image(s) contained in this download will range from 600-800 pixels wide 72 pixels per inch resolution.  

PART 5:  VIEWING REMOTE SENSING DERIVED IMAGES
Software capable of displaying a TIFF or JPEG image can be used to display images from the Remote Sensing Image Gallery.  Image(s) are geotagged.

PART 6:	 LEVEL 1T DATA
If the image was taken from a LANDSAT satellite, the Image Slideshow will have a link to the Level 1T Data and will route the user to the Earth Explorer interface to retrieve the raw data used in the composite image.  
http://earthexplorer.usgs.gov/download/options/ + collection id + Landsat Entity ID.

A user will have to log into Earth Explorer to access this data.