Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Remote sensing in support of French Guiana

09.06.2006
Vegetation maps of Amazonia and the Guyanese Plateau generally show a vast swathe of green. Observing and monitoring huge areas of tropical forest is a very costly undertaking, which is why detailed maps are few and far between, and generally only cover a single region or country. However, in-depth knowledge of current land use patterns, including mining, agricultural and logging operations, whether legal or illegal, is crucial to any plans for integrated development in French Guiana.

A European team headed by CIRAD has shown that spatial remote sensing could be of use in analysing these types of areas, in such a context. Remote sensing, which has not previously been used to any extent in the region, can be used to observe wide and often inaccessible areas, repeatedly and objectively. The eventual aim is to inventory the situation across the whole of French Guiana, so as to enable decision-makers to make informed choices about development.

The team used two tools: a set of daily low-resolution data covering a full year, obtained using the VEGETATION sensor carried by the SPOT-4 satellite. The preliminary information derived from those data was used to define the main vegetation types and identify the landscape structure. The researchers then superimposed maps produced using high-resolution data obtained by the Landsat ETM+ and SPOT-HRVIR satellites, characterizing human impact.

By combining those data, the researchers were able to produce a map of vegetation type distribution. Three main soil cover families were identified: swamps, including mangroves and varzeas, humid riverside zones, and forests and savannahs. Three types of activity were detected within those areas. Forestry operations (felling and skidding) were identified from gaps in the forest. Gold panning, and more specifically sludge decantation ponds, was pinpointed from deforested areas. Lastly, agricultural activity in western French Guiana was assessed: infrastructures such as roads, tracks and forest trails were detected, as were farmed areas. Only regenerated forest areas escaped detection, depending on the degree of regeneration.

This technique has laid the technical foundations for planning and managing vast areas as efficiently as possible.

Valéry Gond | alfa
Further information:
http://www.cirad.fr/en/actualite/communique.php?id=471

More articles from Agricultural and Forestry Science:

nachricht Alkaline soil, sensible sensor
03.08.2017 | American Society of Agronomy

nachricht New 3-D model predicts best planting practices for farmers
26.06.2017 | Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.

As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

Cholesterol-lowering drugs may fight infectious disease

22.08.2017 | Health and Medicine

Meter-sized single-crystal graphene growth becomes possible

22.08.2017 | Materials Sciences

Repairing damaged hearts with self-healing heart cells

22.08.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>