CARTODATA sub-project

SUMMARY OF THE PRECEDING “EPISODES”

Oporto, 10-13 october 2006 University of Molise

Pierfederico De Pari

what have we told in the preceding meetings? DATABASE AND GIS „

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Natural phenomenona intrinsically possess a geographical character The phenomenona cannot put aside from the geographical aspect, for a rational organization of data Tools able to organize great bases of data are necessary to geographically report them, or to attribute a geographical characteristic

Università degli Studi del Molise

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what have we told in the preceding meetings? DATABASE AND GIS „

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These features are contained in GIS (Geographic Information System) GIS allows to represent an element (point, line or polygon) in bidimensional space definited by couples of coordinates and associate them to one record of relazional database The enrichment of database can also happen for following footsteps provided that every element is defined in univocal way in the space of reference

Università degli Studi del Molise

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what have we told in the preceding meetings? GIS E GEOGRAPHICAL REFERENCE SYSTEMS „

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The cartography of Molise region is reported in Gauss-Boaga system (Datum Roma-40) In Italy we use more frequently the system of reference Gauss-Boaga or the system UTM ED-50 The choice of the system of reference is function of the objectives defined by the Region for the geographical representation of its areas and the particular position of Molise in comparison to the national meridian (Rome Monte Mario)

Università degli Studi del Molise

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what have we told in the preceding meetings? GIS E GEOGRAPHICAL REFERENCE SYSTEMS „

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The conversions from a system of reference to the other, always possible from the theoretical point of view, intrinsically contain a degree of uncertainty and the difficulty of certification of the cartographic datum The organization of new bases of data geographically refered must be precedes from delicate phase of choice of the system of reference to avoid the systematic introduction of errors in the case of following conversions

Università degli Studi del Molise

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what have we told in the preceding meetings? GIS E GEOGRAPHICAL REFERENCE SYSTEMS „

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The actual development of the technology GPS and the possibility to directly acquire in field the position of points and/or punctual/linear elements, suggest the appeal to the system of reference WGS-84 (Datum WGS-84) The Italian Geographical Military Institute, preceded to the validation of the whole national cartography, it possesses a net of known points, recently adjourned (1995), of which the monographs are available

Università degli Studi del Molise

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what have we told in the preceding meetings? SOFTWARE „

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The demand to represent elements in a bidimensional space has been being felt so much that the softwares house has run over a lot in the sector of GIS The available products on the market or online they are manifold, and every with own peculiarities The choice of the software depends on numerous motives among which the principal is the simplicity of interchange of the information

Università degli Studi del Molise

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what have we told in the preceding meetings? SOFTWARE „

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We chose, therefore, to use the product of the ESRI denominated ArcView (release 9.1). This release, vertically compatible with the others of the 3.x series, represent the software product more diffused inside the technical sectors of the territorial Corporate body The information interchange with the Corporate body and the possibility to use the sets of data without having to resort to delicate operations of conversion are a guarantee of quality of the final products

Università degli Studi del Molise

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CARTODATA sub-project “NEWS” METADATA AND GEOGRAPHICAL REFERENCE SYSTEMS: METHODOLOGIC APPROACH Oporto, 10-13 october 2006 University of Molise

Pierfederico De Pari

STATE OF THE ART „

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The necessary activities for the realization of the “SITRA” (acronym of Territorial Informative System for the Environmental Risks – in italian) are in progress. After the first phase of data retrieval in the territorial public corporate body, we have proceeded to homogenize all the informations and to create all informative layers of SITRA. The informative layers have been separate in informative layers of base and informative layers of work.

University of Molise

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STATE OF THE ART The informative layers of base are: „ Land use (completed) „ Geology, geomorphology and hydrogeology (in progress) „ Lifelines (completed) „ Infrastructures of public utility (in progress) „ Architectural-historical buildings (in progress with CNR) „ Environmental resources (completed) „ Industries and productive firms (completed) „ Works of captation for hydrogeological resource (completed)

University of Molise

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STATE OF THE ART The informative layers of work are: „ Map of seismic hazard (completed) „ Map of landslide hazard (completed) „ Map of flood hazard (completed) „ Map of vulnerability of hydrogeological resource (in progress) „ Map of coastal erosion (in progress with ENEA)

University of Molise

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METADATA „

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Metadata, according to the classical definition, can be defined as ‘data on the data' and represent the documentation of the data (a kind of certificate) that furnish useful and immediate information to understand, to compare and to exchange the data that they describe. Metadata, in the optics of the interoperability (possibility to contemporarily operate and in way coordinated on the same data sets), represent a very useful tool in how much they allow a rapids management (search, diffusion and acquisition) of the territorial data from authorized subjects.

University of Molise

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METADATA „

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The utility to realize and to individualize a methodology of job for the metadatum dresses again an enormous importance within CARTODATA sub-project. In fact, treating of procedures usable in European circle, the possibility of information interchange on the data is more main point of the data themselves. The metadatum experimented within the CARTODATA sub-project, foresees the description of the elaborate individuals that compose a project. Within the job the standard ISO19115 will follow it regarding the criterions of creation of the metadata for the datasets.

University of Molise

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METADATA „

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In CARTODATA sub-project we will use the software ArcView GIS 9.1 of the ESRI Inc.® also to allow rapid way the creation of the metadatum according to an only standard with the instructions that the same software proposes in the different languages. The possibility to execute automatically adjourn the metadatum from the software (in the limits of the information automatically adjournable) from the software it represents a further aspect that has made to slant toward the release 9.1 of ArcView GIS.

University of Molise

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GEOGRAPHICAL SYSTEMS OF REFERENCE „

In Italy, and accordingly in Molise, the cartographic coordinates more used for defining the positions in the surveys, in the fotogrammetry, in the earth relief with traditional topographical techniques or GPS they are the coordinates Gauss-Boaga (N, E).

University of Molise

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GEOGRAPHICAL SYSTEMS OF REFERENCE „

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In the realization of the project SITRA, one of the most onerous problems, both from the economic point of view and working, it’s connected with the coordinates transformation (and therefore of the thematic cartographies) from a system of reference to another. Particularly is necessary to maintain the full compatibility and the maximum precision with some GIS activate by territorial Corporate body (Region, Provinces, Cities) starting, contemporarily, a trial allows to progressively migrate toward more recent systems of reference and "European", or toward the WGS84.

University of Molise

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GEOGRAPHICAL SYSTEMS OF REFERENCE „

The existing GIS in Molise have been realized using as datum the system of national geodetic reference (Roma40), and as system of plain coordinates that of Gauss-Boaga. From this the choice to maintain such datum as reference for the cartographies of base and job to be inserted in the SITRA. We would create some certified procedures of conversion to define new cartographies in the system of European reference for excellence WGS84.

University of Molise

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GEOGRAPHICAL SYSTEMS OF REFERENCE „

In Italy there is an only structure able to certify the conversions through a series of "grates" that contain, stings for point, the differences of latitude and longitude among reported points to the datum Roma40 and reported points to the datum WGS84. Such structure, denominated IGMI (Geographical Military Italian Institute), it is also owner of the net IGM95 and, therefore, of the materialization of the points reported to the ellipsoid of 1984.

University of Molise

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GEOGRAPHICAL SYSTEMS OF REFERENCE „

Such procedure, possible through a software really from the IGMI, it allows the conversion of the coordinates of geographical elements excluding the introduction of coarse errors. The software, denominated VERTO, it allows to perform the conversion of express positions in geographical and cartographic coordinates among the Geodetic Systems of Reference used today more commonly in Italy (Roma40, ED50 and WGS84).

University of Molise

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GEOGRAPHICAL SYSTEMS OF REFERENCE „

Once completed the SITRA, the procedures of conversion of the coordinates will be started. They will allow to use the bases of data in both the systems of reference: Gauss-Boaga, to be able to keep on maintaining a homogeneous cartography for representation on the whole regional territory; WGS84, to be able to open the Territorial Informative System for the Environmental Risks to European contexts, as foreseen by the project NOE'.

University of Molise

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THANK FOR YOUR ATTENTION

University of Molise

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