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Geovisualizations
by Christoph Hormann
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The Green Marble mosaic version 2

Green Marble global mosaic

The Green Marble version 2 is a whole earth image mosaic assembled from visual color satellite images. It is successor of the Green Marble version 1, the first truly global mosaic covering the full planet surface from the equator to the poles based on actual measured colors and with seamless coverage of the oceans. And it is the first truly cloud free mosaic with no residual clouds even in critical areas in the tropics. The Green Marble version 2 offers a higher quality uniformly across the whole earth surface than any other product currently available.

The Green Marble represents the surface color at the local vegetation maximum or snow/ice minimum at any part of the planet - hence the name. So in total it does not show any particular point of time but instead shows a generalized typical appearance of the earth surface.

Key properties

  • Full coverage of the planet surface up to the poles and including the oceans
  • 100 percent cloud free
  • Based on MODIS surface reflectance data for land areas and sea ice, Sentinel-3 water reflectance data for water areas, primarily from 2015-2019
  • 250m/300m resolution on both land and water, processed at 250m resolution
  • Depiction of the average vegetation maximum and snow/ice minimum appearance at any point on earth
  • Sea ice rendering showing either the typical summer extent or maximum ice free water.
  • Available as linear surface reflectance values as well as tone mapped and relief shaded images in any projection. Different shading variants available for the polar regions

Improvements of version 2

Compared to version 1 the version 2 mosaic offers the following improvements:

  • Updated data basis from mostly 2015-2019.
  • Globally uniform resolution of 250m/300m even on the open ocean.
  • New data basis for the water offering higher quality and lower noise levels from very recent Sentinel-3 data.
  • New processing technique for the polar regions offering higher quality rendering from a shorter time frame of data (2016 to 2019).
  • Improved color accuracy, in particular for areas with no or little vegetation.
  • Broadened data basis and improved processing offering lower noise levels in particular also in critical areas of the tropics.
  • Additional rendering options and variants available:
    • Selective HDR tone mapping for better readability of the Antarctic. This is the default tone mapping, the previous globally uniform rendering can be produced on request.
    • Morning and afternoon shading available for the Antarctic and high latitude Arctic in addition to the standard shading minimized rendering.
    • Ocean rendering either with typical summer sea ice extent or with open water maximum.
    • Water only mosaic is also available on request.

Sample gallery

Europe in conic projection Europe in conic projection with relief shading The Arctic with normal sea ice depiction The Arctic with minimized sea ice depiction Southern Norway Greenland with standard tone mapping Greenland exposed for the snow areas Kamchatka peninsula The Caribbean The Great Barrier Reef Transantarctic mountains in shading minimized version Transantarctic mountains with morning lighting Northern South America without clouds Southern Alaska Southern Alaska detail The Torres Strait The Ganges delta and the eastern Himalayas Peru and Lake Titicaca The northern Antarctic peninsula The Tian Shan mountains and Issyk-Kul Lake Sahara desert

Demo map

Here is a demonstration map in web mercator projection based on the Green Marble mosaic

A small version of the tone mapped Green Marble version 1 in plate carrée projection (EPSG:4326) is available for testing under CC-BY-SA license:

For custom licensing you can obtain any other projection and size of course. For use in web maps i can also provide tile services.

Green Marble version 2 license inquiry

You can use this form to make your inquiry, it is also available via encrypted connection. If you prefer you can also make your inquiry via email of course, at your option also with encryption).

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What you are interested in

Tone mapped image mosaic for use in print or on screen
Mosaic with relief shading
Linear surface reflectance data for custom processing

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Your Green Marble license inquiry

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Todays featured image:

The Antarctic Peninsula at Night
The Antarctic Peninsula at Night
Nighttime Landsat mosaic of the Antarctic Peninsula with North on the lower right. [more]
Design and Content Copyright 2020 by Christoph Hormann
last updated Sat, 18 Apr 2020 11:50