sistema de informação geográfica

Determina el cambio en el uso de la tierra y la fragmentación de las zonas boscosas en el Corredor Biológico Lago Arenal Tenorio (CBLAT), en el periodo 2000 – 2017. Se utilizó imágenes del programa Landsat, a las cuales se les aplicó corrección radiométrica y atmosférica. Se realizó una clasificación supervisada utilizando el algoritmo de máxima probabilidad.

OPEN FORIS Y SEPAL (Sistema de acceso de datos de observación de la tierra, procesamiento y análisis para el monitoreo de la superficie terrestre)

In the Gash Delta of Eastern Sudan, spate irrigation (flood-recession farming) contributes substantially to rural livelihoods by providing better yields than rainfed dryland farming. However, spate irrigation farmers are challenged by the unpredictability of flooding.

Historic data and old topographic maps include information on historical floods and paleo-floods. This paper aims at identifying the flood hazard by using historic data in the drainage basin of Pinios (Peneus) River, in Thessaly, central Greece. For this purpose, a catalogue of historical flood events that occurred between 1979 and 2010 and old topographic maps of 1881 were used.

Arid and semi-arid regions have different spectral characteristics from other climatic regions. Therefore, appropriate remotely sensed indicators of land use and land cover types need to be defined for arid and semi-arid lands, as indices developed for other climatic regions may not give plausible results in arid and semi-arid regions.

Community land and natural resources lie at the heart of social, political and economic life in much of rural Africa. While the Zambian government acknowledges customary tenure, it has not established required legislation needed to secure it and support to communities in their efforts to protect their lands.

L’homme à travers ses actions dénature fortement l’occupation des sols engendrant une modification du milieu naturel. Cet impact rend la nécessité de fournir aux décideurs des cartes d’occupations des sols et des informations relatives à leur état et dynamique. C’est dans cette optique qu’une étude de l’occupation des sols a été conduite dans les carrières de phosphates au sud-est du Togo.

Land Use and Land Cover (LULC) classes defined by subjective criteria can diminish the significance of a study, hindering the reproducibility and the comparison of results with other studies.

Since the 1990s, many peatlands that were drained for peat extraction and agriculture in Russia have been abandoned with high CO2 emissions and frequent fires, such as the enormous fires around Moscow in 2010. The fire hazard in these peatlands can be reduced through peatland rewetting and wetland restoration, so monitoring peatland status is essential.

Mobile Terrestrial LiDAR (Light Detecting And Ranging) (MTL) is a new technology adapted to increasing need of 3D geo-referenced data. The system requires an integration of laser scanners with other sensors of navigation such as GPS and INS and inertial measurement unit. This fusion allows direct georeferencing of point cloud data.

Despite the local and global importance of forests, deforestation driven by various socio-economic and biophysical factors continues in many countries. In Nepal, in response to massive deforestation, the community forestry program has been implemented to reduce deforestation and support livelihoods.

This Handbook aims to explain how satellite Earth Observation (EO) are an essential tool in the development of the information and evidence required by many of the SDG Targets and Indicators.It has been prepared for national agencies, UN bodies and other SDG stakeholders working towards a collective implementation of the 2030 Agenda and towards a cost-effective response of countries to the SDG