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| Satellite imagery |
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| Landsat satellite imagery |
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Through its outreach activities programme, GLCN promotes the distribution
of base satellite imagery to workshop participants. National coverage
of Landsat images is distributed using DVDs or large storage devices
(cover sample on the right).
The availability of such data sets is a great support for agricultural trends
analysis, landcover changes studies and the concomitant loss of natural ecosystems
(agricultural, urban, forestry, deforestation, land degradation), holistic and
integrated approach to the conservation and sustainable use of land resources,
etc.
Background
The FAO archive of Landsat images
(chart
of availability) was received by the
University of Maryland,
United States.
Images are being acquired since 1972 through six operational satellites and
three different sensors:
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Multispectral Scanner (MSS): The MSS acquired imagery in four
channels (2 visible, 2 near-infrared) at 79-meter resolution. The MSS
was included on Landsat-1 through Landsat-5.
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Thematic Mapper (TM): The TM provide imagery in 7
multispectral channels (3 visible, 1 near-infrared,
2 mid-infrared, 1 thermal-infrared) at 30-meter resolution
(120-meter resolution for the thermal-infrared band).
The TM was included on Landsat 4 and 5.
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Enhanced Thematic Mapper Plus (ETM+): The ETM+
instrument currently flying on Landsat-7 is similar
to the TM, but adds an extra 15-meter
resolution panchromatic band, and improved
resolution for the thermal-infrared band (60-meters).
The figure below shows the global coverage of Landsat scenes available
through the GLCN data distribution programme:
If you have questions or technical issues to submit, please do not hesitate to
contact us.
Additional Landsat sources:
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