1,721,102 research outputs found
Campagna di misure radiometriche e osservazioni per l’interpretazione di immagini da satellite nella regione di Tozeur, ottobre 2002 - Master in Telerilevamento e GIS sul tema: "Desertificazione e processi di degrado nell’area mediterranea.
No full textUso di tecniche di telerilevamento per la realizzazione di cartografie tematiche in un settore del Tigray -Etiopia settentrionale
No full textL'ambiente naturale lungo un transetto Sardegna - Tunisia. Prime valutazioni di un'analisi geomorfologica e di land-use
No full textI dati multisensore e multirisoluzione nello studio degli ambienti aridi
No full textI deserti sono i luoghi dove le condizioni estreme di aridità limitano fortemente o totalmente lo sviluppo di una copertura vegetale. Così le successioni
stra t i g rafiche delle formazioni geologiche e
la evidente natura delle forme appaiono nelle
immagini telerilevate come caratteri distintivi del
p a e s a g g i o .
At t ra v e rso l’applicazione di metodologie di
Telerilevamento, l’elaborazione di modelli tridimensionali
del terreno e rilevamenti in sito, si
p ropongono alcune applicazioni mirate alla individuazione
di unità geomorfologiche secondo
legende mira t e. Viene inoltre presentata una
importante estensione del concetto di bene geologico
e geomorfologico ampiamente discusso in
ambito nazionale ed internazionale riguardo ai
temi del geoturismo, proponendo una lettura dei
“geositi da satellite”.
Tale approccio metodologico consente l’analisi a
media e piccola scala, in un contesto di studio
regionale e sub-re g i o n a l e, di vaste porzioni di territorio,
fornendo valutazioni circa le dinamiche
ed i processi che regolano l’evoluzione dei gra n d i sistemi fisiografici
L'immagine da satellite. Analisi delle elaborazioni per semplificare la rappresentazione di parametri per studi territoriali
No full textApplication of spectral indexes to SPOT images in the study of Iraq marshland
No full textUnder the project coordinated by UNEP, "Support for Environmental Management of the Iraqi Marshlands", which is part of the Iraqi Marshlands Observation System (IMOS), other researchers were involved in the development of analytical techniques for the protection of this vast system with a high risk environmental degradation for intense activity. This is the southern sector of the alluvial plain of the Tigris and Eufrate. The climate of Mesopotamia is arid with an average annual rainfall ranging from 100 to 150 mm. The high summer temperatures lead a very high value of evapotranspiration summer as opposed to the events of flooding caused by winter rainfall on Anatolian and Zagros mountains (> 1000 mm). The purpose of this study is to propose a system of image processing SPOT for the recognition of the state of soil moisture surrounding the system of marshes, to be used as an investigative geomorphological tool to monitor changes in water levels. The results obtained in this first phase of the study make it possible to bring the sensor SPOT as a tool for monitoring, and the second phase of the study will lead to confrontation with one or a series of images acquired at different times (the image used was acquired on 23/07/2006 in the summer season with anhigh evapotranspiration and aridity of the system environment)
L’uso del Telerilevamento satellitare per una corretta analisi degli impatti ambientali del turismo, nel Parco Nazionale del Sagarmatha (Nepal).
No full textA broad definition of tourism may be the moving of people from one place to the another and between different countries too. The consequence is the participation of trades, governments and single persons which have to provide all necessary services. The main elements for the developing of tourism business are: the per capita income growing, the technological communication increasing and the largest availability of free time for holidays. We can consider other factors for touristic needs too as: a physiological, cultural and religious requirement to satisfy own wishes; the belief that it’s necessary to visit a specific place to gratify a specific condition and finally the economic availability. An important point of attention is the quantitative and qualitative decreasing of natural touristic resources. This is due to urban spreading and to environmental impact of touristic activities too. The Sagarmatha National Park with its grandiose landscape views, the highest peaks in the world and the local cultural tradition lends to an elitist tourism of climbers and trekkers. The price to be paid for it is high in terms of economic and natural resources. This study aims to begin to analyze the outer dis-economies in the touristic integrated offer in this geographic area. The adopted methodology proposes multi-temporal remote sensing techniques as a tool for understanding the environmental impacts. We hope to contribute to know more about the natural response to touristic impact and to facilitate the land-use planning for bio-potential index increasing. These actions are effective if we consider to support the local Sherpa communities and their quality of life
Image processing di scene satellitari ad alta risoluzione ASTER per l’individuazione e caratterizzazione delle relazioni fra assetto geomorfologico e pattern agricolo
No full textSono state analizzate due scene satellitari ASTER della Sardegna e del
Veneto, al fine di estrarre delle informazioni sull'assetto geomorfologico e sulle
relazioni con la tipologia di uso del suolo.
Lo studio è stato eseguito mediante fotointerpretazione delle immagini satellitari
(bande VNIR); altre informazioni sono state astratte dalle immagine termiche (bande
TIR) che hanno permesso di evidenziare delle paleo-forme non visibili ed
interessate da differente “pattern agricolo”
Analysis and validation of a methodology to evaluate land cover in the Mediterranean basin using multitemporal MODIS data
No full textIn this work two techniques for the classification of multitemporal MODIS data were compared. Especially, it was applied a procedure to identify the different land covers in Sardinia, based on decision tree classification, analyzing the seasonal variations of coverage and assessing their accuracy. The accuracy of results was assessed through the use of a statistical approach based on confusion matrix, comparing the accuracy of estimates from the two classification techniques for MODIS images of the year 2000. In the present study are discussed the first results on the analysis; they show the feasibility of using the MODIS 250 m data for the monitoring of land cover in areas with a mixed vegetation such as Sardinia
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