Geographic Base Map: ArcGIS Online World Imagery
World Imagery, last updated August 2017, provides one meter or better
satellite and aerial imagery in many parts of the world and lower
resolution satellite imagery worldwide. The map includes 15m TerraColor
imagery at small and mid-scales (~1:591M down to ~1:72k) and 2.5m SPOT
Imagery (~1:288k to ~1:72k) for the world. The map features 0.3m
resolution imagery in the continental United States and parts of
Western Europe from DigitalGlobe. Additional DigitalGlobe sub-meter
imagery is featured in many parts of the world. In the United States,
1 meter or better resolution NAIP imagery is available.
In other parts of the world, imagery at different resolutions
has been contributed by the GIS User Community. In select communities,
very high resolution imagery (to 0.03m) is available down to ~1:280
scale.
The map consisting of:
Arctic Base Map: Blue Marble Next Generation
The Blue Marble: Next Generation is a series of images that show the
color of the Earth's surface for each month of 2004 at moderate
resolution (500 meters/pixel) at a global scale. These monthly images
reveal seasonal changes to the land surface: the green-up and dying-back
of vegetation in temperate regions such as North America and Europe,
dry and wet seasons in the tropics, and advancing and retreating
Northern Hemisphere snow cover. In 2004, the generation of the Blue
Marble: Next Generation imagery utilized new techniques allowing the
computer to automatically recognize and remove cloud-contaminated or
otherwise bad data - a process that was previously done manually.
Blue Marble: Next Generation consisting of:
Projection: Arctic Polar Stereographic Projection (EPSG:3413)
Antarctic Base Map: Blue Marble Next Generation
The MODIS Blue Marble, Next Generation layer is a cloud free, true color
composite of MODIS imagery from August 2004. MODIS Blue Marble is a static
product. It was created with data from the MODIS instrument on board the
Terra satellite. The image resolution is 500 m. This base map is created
by using the WMS service provided by Worldview/Global Imagery Browse
Services (GIBS).
Blue Marble: Next Generation consisting of:
Projection: Antarctic Polar Stereographic Projection (EPSG:3031)
MODIS True Color - Terra Corrected Reflectance
This layer provides access to NASA Global Imagery Browse Services,
which delivers global, full-resolution satellite imagery.
This band composition (Bands 1 4 3) most accurately represents how we see the earth's
surface with our own eyes.
Data Products
ATL03: ATLAS/ICESat-2 L2A Global Geolocated Photon Data
This data set (ATL03) contains height above the WGS 84 ellipsoid (ITRF2014 reference frame), latitude, longitude, and time for all photons downlinked by the Advanced Topographic Laser Altimeter System (ATLAS) instrument on board the Ice, Cloud and land Elevation Satellite-2 (ICESat-2) observatory. The ATL03 product was designed to be a single source for all photon data and ancillary information needed by higher-level ATLAS/ICESat-2 products. As such, it also includes spacecraft and instrument parameters and ancillary data not explicitly required for ATL03.
ATL06: ATLAS/ICESat-2 L3A Land Ice Height
This data set (ATL06) provides geolocated, land-ice surface heights (above the WGS 84 ellipsoid, ITRF2014 reference frame), plus ancillary parameters that can be used to interpret and assess the quality of the height estimates. The data were acquired by the Advanced Topographic Laser Altimeter System (ATLAS) instrument on board the Ice, Cloud and land Elevation Satellite-2 (ICESat-2) observatory.
ATL07: ATLAS/ICESat-2 L3A Sea Ice Height
The data set (ATL07) contains along-track heights for sea ice and open water leads (at varying length scales) relative to the WGS84 ellipsoid (ITRF2014 reference frame) after adjustment for geoidal and tidal variations, and inverted barometer effects. Height statistics and apparent reflectance are also provided. The data were acquired by the Advanced Topographic Laser Altimeter System (ATLAS) instrument on board the Ice, Cloud and land Elevation Satellite-2 (ICESat-2) observatory.
ATL08: ATLAS/ICESat-2 L3A Land and Vegetation Height
This data set (ATL08) contains along-track heights above the WGS84 ellipsoid (ITRF2014 reference frame) for the ground and canopy surfaces. The canopy and ground surfaces are processed in fixed 100 m data segments, which typically contain more than 100 signal photons. The data were acquired by the Advanced Topographic Laser Altimeter System (ATLAS) instrument on board the Ice, Cloud and land Elevation Satellite-2 (ICESat-2) observatory.
ATL10: ATLAS/ICESat-2 L3A Sea Ice Freeboard
This data set (ATL10) contains estimates of sea ice freeboard, calculated using three different approaches. Sea ice leads used to establish the reference sea surface and descriptive statistics used in the height estimates are also provided. The data were acquired by the Advanced Topographic Laser Altimeter System (ATLAS) instrument on board the Ice, Cloud and land Elevation Satellite-2 (ICESat-2) observatory.
ATL12: ATLAS/ICESat-2 L3A Ocean Surface Height
This data set (ATL12) contains along-track sea surface heights at variable length scales over cloud-free regions. Estimates of height distributions, surface roughness, surface slope, and apparent reflectance are also provided. The data were acquired by the Advanced Topographic Laser Altimeter System (ATLAS) instrument on board the Ice, Cloud and land Elevation Satellite-2 (ICESat-2) observatory.
ATL13: ATLAS/ICESat-2 L3A Inland Water Surface Height
This data set (ATL13) contains along track surface heights of inland water bodies, including lakes, estuaries and rivers. Water surface slope and descriptive statistics are also provided. The data were acquired by the Advanced Topographic Laser Altimeter System (ATLAS) instrument on board the Ice, Cloud and land Elevation Satellite-2 (ICESat-2) observatory.
All elevations are reported as height (orthometric) above the WGS84 ellipsoid in meters. Each dot represents the height of a water surface short segment.
