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This
web
page
enables
the
user
to
plot
a
map
of
current
or
historic
climate
data
for
the
United
States
using
datasets
provided
by
the
National
Climatic
Data
Center.
Users
may
choose
among
three
types
of
variables
(precipitation,
temperature,
and
Palmer
drought
severity
index),
a
variety
of
types
of
plots,
and
a
range
of
dates
from
the
present
as
far
back
as
1895.
Links
to
other
sites,
datasets
and
...
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This
library
contains
over
300
datasets
from
a
variety
of
earth
science
disciplines
and
climate-related
topics.
Users
can
access
and
download
datasets
in
a
variety
of
formats,
including
GIS-compatible
formats,
or
monitor
present
climate
conditions
with
maps
and
analyses.
The
library
is
searchable
by
data
category,
source,
or
by
keyword.
Tools
are
provided
which
permit
analysis
of
datasets
and
creation
...
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This site is provided by the Mineral Resources Program (MRP) of the U.S. Geologic Survey. It is an online geographic information system which covers Earth and the United States. Layers which can be turned on and off feature information on mineral resources, soils, sediments, geologic features, cultural features, land cover, elevation, gravity data, and magnetic data.
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This site provides statistics and information on the worldwide supply of, demand for, and flow of minerals and materials essential to the U.S. economy and to national security. The database is searchable by commodity, country, state, or keyword. Links to a variety of related topics and publications are included.
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Users of this reference can access extensive information on each country, including maps, geographic data, environmental problems, and economic data. The factbook is searchable by country or by keyword.
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This collection of images was captured by the Spaceborne Imaging Radar-C/
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Users can access an extensive array of information on coral reefs. Materials presented here include information on reefs in 131 countries, maps and photos, data on coral bleaching, an online mapping system, a bibliography of reef-related references, and downloadable datasets.
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At
the
end
of
2003,
there
were
2600
known
Near
Earth
Asteroids
(NEAs),
and
of
these
691
are
brighter
than
absolute
magnitude,
which
is
taken
to
correspond
to
a
diameter
of
1
kilometer
or
more.
Of
these,
131
are
classed
as
PHAs
(potentially
hazardous
asteroids)
larger
than
1
km.
This
site
describes
the
potentially
devastating
effects
of
a
collision
between
Earth
and
a
large
meteor
or
asteroid.
It
also
...
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This database of NASA images includes a large selection of pictures of spacecraft, astronomical objects, and NASA facilities and personnel. The database is searchable by keyword, or by browsing a selection of subject categories.
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This
photo
gallery
features
an
extensive
selection
of
imagery
of
many
types
of
objects
in
space.
The
gallery
is
divided
by
type
of
object:
solar
system
(planets,
asteroids,
comets,
etc.),
astronomical
objects
(nebulae,
galaxies.
etc.),
and
other
images
(sun,
spacecraft).
Detailed
captions
are
provided
for
some
images.
Indices
are
provided
for
imagery
from
three
major
sources:
Galileo,
the
Hubble
Space
...
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