Search results for " Topografia"
showing 10 items of 398 documents
Using very high resolution (VHR) imagery within a GEOBIA framework for gully mapping: an application to the Calhoun Critical Zone Observatory
2019
AbstractGully erosion is a form of accelerated erosion that may affect soil productivity, restrict land use, and lead to an increase of risk to infrastructure. An accurate mapping of these landforms can be difficult because of the presence of dense canopy and/or the wide spatial extent of some gullies. Even where possible, mapping of gullies through conventional field surveying can be an intensive and expensive activity. The recent widespread availability of very high resolution (VHR) imagery has led to a remarkable growth in the availability of terrain information, thus providing a basis for the development of new methodologies for analyzing Earth's surfaces. This work aims to develop a ge…
UAV Systems for Photogrammetric Data Acquisition of Archaeological Sites
2012
The use of UAV systems for surveying archaeological sites is becoming progressively more common due to the considerable potential in terms of rapidity of survey, costs and accuracy. The paper presents the first results of the photogrammetric survey of the archaeological site of Himera in Sicily (Italy) using by UAV systems. A complete documentation of the site through the production of a DSM and an ortho image were carried out. The research further evaluated two different image processing workflows: a typical photogrammetric approach and a computer vision approach. An ortho image of the archaeological site with a very high resolution was obtained. Dept. of Civil, Environmental, Aerospace an…
A Kalman filter single point positioning for maritime applications using a smartphone
2020
Different positioning techniques have been largely adopted for maritime applications that require high accuracy kinematic positioning. The main objective of the paper is the performance assessment of a Single Point Positioning algorithm (SPP), with a Kalman filter (KF) estimator, adapted for maritime applications. The KF has been chosen as estimation technique due to the ability to consider both the state vector dynamic and the measurements. Particularly, in order to compute an accurate vertical component of the position, suitable for maritime applications, the KF settings have been modified by tuning the covariance matrix of the process noise. The algorithm is developed in Matlab environme…
Le direttrici viarie dell’antichità tra Palermo e Agrigento
2015
Si illustrano i tratti essenziali della viabilità antica lungo la valle del fiume Platani.
Relazioni tra geomorfologia, processi post-deposizionali e visibilità del suolo nella lettura dei dati di prospezione archeologica
2005
This paper takes into examination two different districts of the vast area investigated by the archaeological survey of the hinterland of the Greek colony of Himera: the coastal area between the northern Imera and Roccella rivers and the hilly watershed zone located between the northern Imera, southern Imera and Platani rivers. The study examines the relationship between geomorphology, post-depositional processes and visibility of the ground and their impact on the interpration of data collected during the archaeological survey and, consequently, on the historical reconstruction of the population of the territory from Prehistory to the Middle Ages. Three aspects have been taken into conside…
GeoNET: WebGIS of a GNSS Permanent Network
2009
In Sicily, from 2005 to 2007, a research group at the Dipartimento di Rappresentazione, DIRAP (University of Palermo) has realized a Global Navigation Satellite System (GNSS) network for real time positioning (Network Real Time Kinematic –NRTK), activity founded by “Minister of Instruction, University and Scientific Research” (MIUR) as “National Interest Research Program” PRIN2005 entitled "Networks of permanent GPS stations for the survey in real time control and use of emergency". The data-base contains different kind of information both general on the network and positional. Positional information can be useful for two types of survey applications: static survey with post-processing of d…
Critical analysis of thermal inertia approaches for surface soil water content retrieval
2013
The “thermal inertia” method to retrieve surface soil water content maps on bare or sparsely-vegetated soils is analysed. The study area is a small experimental watershed, where optical and thermal images (in day and night time) and in situ data were simultaneously acquired. The sensitivity of thermal inertia to the phase difference between incoming radiation and soil temperature is demonstrated. Thus, to obtain an accurate value of the phase difference, the temporal distance between thermographs using a three-temperature approach is evaluated. We highlight when a cosine correction of the temperature needs to be applied, depending on whether the thermal inertia formulation includes two gene…
Definition of a Workflow for Web Browsing of 3D Models in Archaeology
2016
The Cultural Heritage (CH) is a fundamental element of promotion of territories and of tourism development. Publishing 3D models of archaeological sites and their three-dimensional reconstruction on the Web is one of the best ways to spread their knowledge. However, many recent scientific researches in this field have highlighted the limitations and difficulties related to the networking of interactive 3D models. The main difficulties are related to the complexity and the size of models, which influence the access speed, and the cost of software and hardware needed for the publication on the WEB. In light of this background, this article describes the further advances of research activities…
Animal husbandry in Sicilian prehistory: The zooarchaeological perspective from Vallone Inferno (Scillato, Palermo)
2023
Starting in the mid-6th millennium cal BCE, Neolithic groups occupied the midlands of Sicily. The economy of these groups was based primarily on livestock farming. Archaeological and archaeobotanical data indicate an intensification of livestock practices during the Early Bronze Age, leading to a change in the landscape in the form of more open forests. The Vallone Inferno rockshelter in the Madonie massif is one of the few sites that has been systematically excavated in these midlands, and has yielded evidence of Middle Neolithic and Early Bronze Age occupations. This work focuses on the study of prehistoric husbandry in the Sicilian midlands and highlands through the analysis of the Vallo…
Note preliminari sul rinvenimento di un'area artigianale da Contrada Amone e sulla produzione ceramica nel bacino idrografico del fiume Nocella
2019
Questo articolo esamina le evidenza archeologiche di età romana nella Piana di Partinico, un'area ad Est del Golfo di Castellammare ricca di insediamenti rurali e ville tra cui quella famosa di Sirignano. L'area di contrada Amone, già nota per la presenza di un impianto termale e la scoperta di lacerti di mosaici policromi, si arricchisce adesso di una nuova area artigianale. La scoperta di alcuni scarti di tegole ha fornito l'opportunità per riflettere sulla possibile origine delle tegole bollate ONASOY, di cui si accetta tradizionalmente la provenienza dalla baia di San Cataldo. Viene dunque presentato un esame preliminare degli impasti ceramici provenienti da contrada Amone e baia San Ca…