Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
An area where several tiles overlap aligned using stage positions from metadata only (top) and our mosaicking algorithms (bottom). Each pixel in the mosaic is assigned the intensity from the tile it is closest to. Note the clearly visible tile boundaries when only stage positions are used.
