1,720,960 research outputs found
Cadastral Map Upgrading and Layers Harmonization for the Spatial Data Infrastructure in Friuli Venezia Giulia, Italy
No full textThe cadastral map represents an essential layer of any spatial data infrastructure, as well emphasized by the European directive INSPIRE. In this context, each cadastral parcel assumes a fundamental role, since it constitutes one of the key elements for carrying out an interoperable information system. The parcel represents the link among the legal domain information, the public restrictions, the private taxes, and further layers. The cadastral map, therefore, enlarges the required interoperable links to the complete available geo information tools like networks, plans, services and others.
To fulfil this function, the cadastral map must satisfy a high level of accuracy, not reachable at the time of its implementation, often more than one century ago.
Furthermore, the harmonization of a digital cadastral map into a spatial information system is complicated by further problems like fragmented reference systems, inaccurate upgrades, distorted and discontinuous representations. Accordingly, the cadastral map updating requires appropriate interventions. Sometimes the corrective actions prove to be empirical, not reproducible and of costly maintenance. Furthermore, the diversity of solutions hinders the database harmonization of the various administrations. This paper analyses the problems inherent in the Italian cadastral map, describes the methodology developed to update the digital map and recover the original geometric accuracy. Furthermore, the paper shows the results of a global and qualified set of interventions carried out by the Friuli Venezia Giulia regional administration, in cooperation with INSIEL Spa and the University of Udine, that make the cadastral data base fully harmonized and interoperable within the regional spatial data infrastructure
Ricomposizione Procustiana della Rete Fiduciale e della Cartografia Catastale Numerica
No full textIn questi ultimi anni, il gruppo di ricerca dell’Università di Udine ha sviluppato una procedura originale e innovativa per la ricomposizione globale della rete dei Punti Fiduciali del catasto. Tale metodo, basato sulle tecniche dell’analisi procustiana generalizzata, si prefigge di effettuare il miglior adattamento conforme ai minimi quadrati dei vari poligoni fiduciali ricostruiti sulla base degli elaborati tecnici inseriti in PREGEO.
L’idea distintiva è utilizzare per la compensazione della rete non già le singole distanze tra PF, valutate in maniera disgiunta l’una dall’altra, bensì ogni singolo rilievo nella propria interezza, considerato come entità geometrica non disaggregabile, con vertici interconnessi tra di loro da legami rigidi.
La soluzione proposta ha due importanti conseguenze: innanzi tutto, permette di individuare, stimare e risolvere gli eventuali sistematismi presenti nei dati di partenza; inoltre, preservando la forma dei poligoni fiduciali compensati, evita l’insorgenza di deformazioni anisotrope nel tessuto cartografico e mantiene inalterate le mutue relazioni tra i PF e i rilievi di aggiornamento ad essi appoggiati. Tali considerazioni hanno trovato pieno riscontro nella sperimentazione svolta. Dopo una fase iniziale eseguita in
ambiente simulato, le prove hanno riguardato due reti reali situate nei comuni di Udine (zona Udine Nord: 68 PF e 3.8 Km2 di estensione), Gorizia (zone censuarie A e G: 59 PF e 2.6 Km2) e Tarcento (UD) (205 PF e 20 Km2). Il confronto tra i risultati ottenuti dalla ricomposizione conforme e i dati relativi a reti di Punti Fiduciali di controllo appositamente istituite, ha permesso di constatare l’ottimo rispetto delle tolleranze vigenti già a partire da una compensazione vincolata a un numero di PF fissi pari al 10-15% del
totale. Altre verifiche hanno evidenziato inoltre come il metodo procustiano riesca, a differenza del metodo di compensazione classico, a ridurre gli effetti di componenti sistematiche d’errore eventualmente presenti nelle misure.
Gli esiti della sperimentazione hanno permesso di consolidare il metodo in funzione della fase successiva, ovvero la ricomposizione cartografica numerica delle particelle. Nel presente lavoro sono illustrati i primi risultati in questa direzione, ossia l’inserimento, mediante trasformazione conforme ai minimi quadrati, dei rilievi PREGEO all’interno delle reti fiduciali compensate.
Per testare la bontà dell’operazione, è stata eseguita una doppia serie di indagini: nella prima si sono valutate le effettive discrepanze, in termini di coordinate, tra punti omologhi di rilievi adiacenti; successivamente, mediante sovrapposizione, si sono confrontati i contenuti della mappa catastale parziale così ricostruita con quelli della carta tecnica numerica del Friuli Venezia Giulia. Nel primo caso, le differenze riscontrate sono risultate estremamente contenute; nel secondo, è stata confermata e messa in risalto la notevole
congruenza ottenibile tra i due prodotti cartografici a seguito della ricomposizione dei rilievi catastali.
Ulteriori miglioramenti sono stati permessi dall’attuazione di una procedura di ricomposizione che considera simultaneamente i poligoni fiduciali ed i punti omologhi appartenenti a rilievi catastali adiacenti tra loro
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Analisi della copertura e prime sperimentazioni di concatenamento a scala regionale dei poligoni fiduciali catastali in Friuli
No full textVariations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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