Search results for " Topografia"
showing 10 items of 398 documents
RFI: il caso studio della stazione GNSS dell’Università di Palermo
2009
La sperimentazione descritta in questo lavoro riguarda la prima parte di una ricerca, tuttora in corso, che vede coinvolti l’Agenzia Regionale Protezione Ambiente Sicilia (ARPA) e il Dipartimento di Rappresentazione dell’Università di Palermo (DIRAP), avente come tema le problematiche relative alle interferenze da radio frequenza registrate dalla stazione permanente GNSS dell’Università di Palermo. La stazione è stata materializzata nel 2006 e dal 2007 fa parte della rete di stazioni permanenti GNSS-NRTK gestita dal DIRAP, per attività di studio di ricerca. In particolare, in questo lavoro sono illustrati i test che sono stati condotti e i risultati in termini di interferenza elettomagnetic…
Performance assessment of PPP surveys with open source software using the GNSS GPS-GLONASS-Galileo constellations
2020
In this work, the performance of the multi-GNSS (Global Navigation Satellite System) Precise Point Positioning (PPP) technique, in static mode, is analyzed. Specifically, GPS (Global Positioning System), GLONASS, and Galileo systems are considered, and quantifying the Galileo contribution is one of the main objectives. The open source software RTKLib is adopted to process the data, with precise satellite orbits and clocks from CNES (Centre National d&rsquo
Da Buenos Aires a Milano. L’inizio del “racconto italiano” di C. E. Gadda
2019
L’articolo propone una rilettura del segmento iniziale del "Racconto italiano" di Gadda fondata sul nesso tra luoghi ed esperienza, cioè sulla declinazione narrativa del rapporto tra individuo e spazio. Lo scrittore, alle prese con il suo progetto di romanzo, si prefigge, di dare infatti una rappresentazione dell’eterna condizione umana nella particolare situazione dell’Italia: «Species aeternitatis in specie Italiae». L’articolo mostra, come a partire da questa fase laboratoriale, i luoghi diventino figure della conoscenza, mettendo in luce la connessione tra le forme dello spazio – naturale e antropico – e l’istanza conoscitiva e morale (il “lavoro”) che sommuove in profondità la poetica …
On the Choice of the Most Suitable Period to Map Hill Lakes via Spectral Separability and Object-Based Image Analyses
2023
Technological advances in Earth observation made images characterized by high spatial and temporal resolutions available, nevertheless bringing with them the radiometric heterogeneity of small geographical entities, often also changing in time. Among small geographical entities, hill lakes exhibit a widespread distribution, and their census is sometimes partial or shows unreliable data. High resolution and heterogeneity have boosted the development of geographic object-based image analysis algorithms. This research analyzes which is the most suitable period for acquiring satellite images to identify and delimitate hill lakes. This is achieved by analyzing the spectral separability of the su…
Digital orthophotos at a scale of 1:5000 from high resolution satellite images
2004
This paper describes the first results of a study, carried out within the national research program “Cofin2001”, on the potential use of high resolution satellite images for making digital orthophotos at a scale of 1:5000 and 1:10,000. Particularly, images from IKONOS II and QuickBird of four different types of areas were employed: the first area is the city of Palermo, a greatly urbanized area; the second area is the extra-urban territory near the town of Contessa Entellina in south-western Sicily; the third area is the famous tourist resort of Scopello, in the western Sicily; the last area is the Caselle Airport, a flat zone near Torino. The first three images were orthorectified by using…
Hyperspectral and multispectral perspectives on the prehistoric cultural landscape; the ground-truthed chemical character of prehistoric settlement a…
2006
Remote Sensing applications in archaeology
2011
In recent years Remote Sensing applications in archaeology have become increasingly frequent. This plurality of applications depends mostly on the rising interest of the scientific community in modern methods for surveying geographic data, which have become increasingly powerful, automatic and reliable. Remote Sensing, with its various techniques, offers the rapid acquisition of a huge quantity of metric and qualitative data in order to describe or to identify archaeological sites. For an appropriate and widespread use of these data, it is still necessary to have recourse to GIS techniques; as a matter of fact, only the combined use of both methodologies provides a full exploitation of thei…
SPIE Proceedings Vol. 8538 Earth Resources and Environmental Remote Sensing/GIS Applications III
2012
These proceedings contain 53 papers that were presented at the SPIE Conference “Earth Resources and Environmental Remote Sensing/GIS Applications” (Conference 8538A) formerly known under the title ‘Remote Sensing for Environmental Monitoring, GIS Applications, and Geology’. The Conference took place in Edinburgh, United Kingdom from 24 September to 27 September 2012. It was the twelfth Conference with this topic after its inauguration in Toulouse, France, in 2001. The Conference sessions with presented papers and interactive posters were grouped into the following themes: Processing Methodologies, Hazard Mitigation Geologic Application, Processing Methodologies, Infrastructures and Urban Ar…
EDITORIAL FOR SPECIAL ISSUE: “GEOMATICS APPLICATION FOR GEOGRAPHY (GAG)” in GEOGRAPHIA TECHNICA
2021
Geomatics or Geography, that is the question! This is how the authors' idea of merging Geomatics and Geography in this special issue begins, paraphrasing a Shakespearean citation. The common principle that unites these two scientific disciplines, which attempt to describe the territory in the most straightforward way possible. On the other hand, Geomatics and Geography derived from “gèo- “[greek γεω-], as first element of composed words in learned and scientific terminology, meaning “earth”, “globe”, “land surface”.
Object oriented methodology for change detection technique: the case of Scopello-Sicily
2014
This paper describes a change detection approach based on an object-based classification of remote sensing data for the change detection. The history of urban growth and urbanisation reveals that urban areas belong to the most dynamic land cover types on earth. The trend of urban growth is usually towards the urban-rural fringe where there are less built areas, irrigation and other water management systems. Regardless of the regional economic importance, urban growth, particularly the expansion of residential and commercial land use towards the periphery of urban areas, has an impact on the ecosystem. It is evident that such trend of urban growth has an impact on natural resources and on la…