1,720,993 research outputs found
A Conceptual Model for the Management of Multi - Representation Geographical Information
No full textThe project was aimed at the creation of software tools for managing instances of a multi - representation geodatabase, able to define multiple representations and topological constraints, in relation to modelled objects and structures according to the classification of IntesaGIS first and, later, the Italian national technical specifications of the November 10, Italian Ministerial Decree 2011.
An original conceptual model was created, capable of expressing the different representations (scale, time) of the same geographic entities and relationships between them, directly into the geodatabase structure, by inserting an additional level of abstraction.
In addition, various software tools were developed to create the database schema and its population using command line on Windows and Linux systems, as well as a graphical interface.
The final goal is to be able to meet the needs of the production and use of geographical information with spatial and temporal components, with four dimensions: structure, space, time, and multiple representations.
These dimensions are perpendicular to one another and enable individual operations to be performed independently of each other
Progetto SIFS: una esperienza di gestione dell’anagrafe immobiliare della Regione Sardegna a sostegno dei Comuni, per lo svolgimento delle funzioni catastali e per migliorare la gestione delle imposte locali
No full textThis experience is on a first trial for the execution of the Sardinia Region Property Registry. The building database was designed by the reorganization and rehabilitation of cadastral data, using the contribution of information of various kinds, from urban areas, and territorial tax. Through the implementation of specific IT processes and the development of cross processes between the various information collected and structured for this purpose, including, for example, the municipal urban planning and building practices, ICI TARSU databases, Civic numbering and Municipal graphs, the dB2K and orthophotos, the electric utilities and water, with the information flow represented by SIGMATER, was possible to start the planting of a system for supporting the local government to manage the land at the municipal level and to achieve fiscal fairness through the contrast of tax evasion.
The aim of this paper is to present both the organizational and technologic models that were behind the choices made, both the first results obtained on the census and the collection of planning, fiscal and spatial information and structuring process of intersection of computer databases
Rappresentazioni Multiscala: generalizzazione di dati geografici in Ambiente GIS
No full textL’utilizzo di strumenti GIS per la gestione e l’analisi di informazioni territoriali, geografiche ed ambientali, ha spinto l’utente a dotarsi di una enorme quantità di dati a differente livello di dettaglio; nonostante la grande capacità di memorizzazione rappresentata dai moderni strumenti informatici, si pone comunque il problema della loro integrazione a causa della carenza di standardizzazione, in particolar modo nella generazione degli opportuni metadati. Una soluzione a questo problema è rappresentata dalle operazioni di generalizzazione cartografica effettuate in ambiente GIS.
Tuttavia, nonostante la prepotente diffusione dei sistemi informativi territoriali, non è stata ancora completamente recepita dalle aziende, dai professionisti e dagli Enti Pubblici, la necessità di modificare profondamente le metodologie di restituzione delle basi cartografiche deputate al loro utilizzo all’interno di GIS.
L’organizzazione dei dati cartografici ha impietosamente messo in luce come la cartografia numerica sino ad oggi prodotta mal si presta allo scopo, in quanto nasce dall’impiego di operazioni di restituzione numerica quasi integralmente mutuate da quelle analogiche.
E’ necessario allora definire quali caratteristiche debbano possedere i dati cartografici da trattare perché diventino sufficientemente idonei ad essere impiegati all’interno di un SIT. E’ importante notare che in una qualunque cartografia gli oggetti sono identificati da codici che presi singolarmente non costituiscono tematismi ma solo una base per la realizzazione delle coperture del SIT. Così come va sottolineato che le coperture non si possono ottenere dalla semplice unione di più codici. Perché ciò avvenga la restituzione cartografica andrebbe effettuata dopo aver progettato il sistema informativo. Ciononostante le carte attualmente prodotte trasportano informazioni che, accuratamente filtrate e controllate, possono costituire singole coperture.
Nella maggioranza dei casi, si rende allora necessario intervenire preventivamente sulla base dati cartografica al fine di generare i necessari tematismi attraverso l’analisi della codifica utilizzata, delle incongruenze geometriche e la loro successiva ristrutturazione
La derivazione cartografica in ambiente GIS della CTR numerica della Regione Sardegna alla scala 1:50.000
No full textTrattamento della CTR numerica della Regione Sardegna per la organizzazione dei dati geografici nel SIT
No full textApplicazione e valutazione di qualità di un modello di generalizzazione cartografica dalla scala 1:10000 alle scale 1:50000, 1:100000 e 1:250000
No full textSpatial data: from cartography to geodatabase
Full text linkThe final goal of this paper was to fix a brief summary on the status of geographic information in Italy due to the technological steps and national regulations. The acquisition, processing and sharing of spatial data has experienced a significant acceleration thanks to the development of computer technology and the acknowledgment of the need for standardization and homogenization of information held by public authorities and individuals. The spatial data represents the essential knowledge in the management and development of a territory both in terms of planning for safety and environmental prevention. In Italy there is an enormous heritage of spatial information which is historically affected by a problem of consistency and uniformity, in order to make it often contradictory in its use by the public decision-maker and private parties. The recent history of geographic information is characterized by a significant effort aimed at optimizing this decisive technical and cultural heritage allowing the use of it to all citizens in a logic of sharing and re-use and may finally represent a common good available to all
Integrazione delle informazioni catastali nel DBMS della Regione Sardegna
No full textThe architecture of the DBMS of the Sardinian regional government, conceived as generalist, may be subject to specific working, with the prospect of meeting the needs of local authorities, through specialization in areas of interest.
Several projects started by the Sardinian regional government, have laid the groundwork to allow the integration of information from heterogeneous databases, and were aimed, for example, to setting up the Property Registry.
The DBMS has been excluded from these projects, but it has several levels of information useful for both the technical department and for other areas, once integrated with the cadastral data.
The following work is related to an experiment with objective the connection of the information contained in databases of the AdT, with the real representation of the territory offered by the DBMS, the proposed process was designed to determine any changes to logical model to integrate, within it, the cadastral information.
A future goal will be the definition of procedures to allow the upgrade of its components, both with the inclusion of new subdivisions and new information generated by digital cartography, orthophotos or topographic surveys
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