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82 Cha pte r T w o

is not a problem, then the direct downloading option is preferred.
Downloading should take place during off-peak times (e.g., evening
or weekends) when the Internet speed is the fastest. This is especially
important if the ordered data are measured in hundreds of megabytes.
No matter whether the data are couriered or downloaded, they must
be saved in a common format. This format may be image specific, for
instance, HDF for ASTER data. If there is an option in specifying the
image storage format, always use TIFF or GeoTIFF.
Finally, the user needs to be aware of the data license policy, as
well as any restrictions on the use of the data. For instance, can the
data be used commercially? Is it possible to share the data with other
researchers at the same institution? Are there any implications in
publishing results generated from the data? Some data suppliers
require the user to acknowledge them as the legitimate copyright
holder of the raw data and results derived from them in all
publications. The user must honor these requests in order to avoid
any potential litigation.

References
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