“Cataloguing, Processing and Downloading heterogeneous geodata on the Internet” by Andrea Musone...

“Cataloguing, Processing and Downloading heterogeneous geodata on the Internet”

by Andrea Musonec/o Intecs Sistemi SpA, via L. Gereschi, 32 - 56127 Pisa (Italy)

Tel. +39 050 545111, fax: +39 050 545200http://www.pisa.intecs.it, [email protected]

Paper and slides online at http://www.pisa.intecs.it/~andream

5th EC-GIS Workshop, “GIS OF TOMORROW”Stresa, Italy28-30 June 1999 ____________________________________________________________________________________________________________________________________

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INTECS SISTEMI SpA

The Company: ISO 9000-certified SME;

Where: Pisa (I), Rome (I), Piombino (I), Naples (I), Tolouse (F);

How many: 170 people (90% graduated);

Business: Space, Defense, Civilian, Research;

What: Software Engineering, Real-Time Software,

Space On-Board & Ground Software,

Distributed Multimedia Information Systems;

To know more: http://www.intecs.it or http://www.pisa.intecs.it/

5th EC-GIS Workshop, “GIS OF TOMORROW”Stresa, Italy28-30 June 1999 ____________________________________________________________________________________________________________________________________

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Scenario

GIS Applications:

multiple domains (agriculture, transports, geology, etc.); proprietary (e.g. based on commercial GISs); working on a variety of geodata formats; interoperable through geodata export/import;

Geodata conversion: costly and complex.

5th EC-GIS Workshop, “GIS OF TOMORROW”Stresa, Italy28-30 June 199______________________________________________________________________________________________________________________________________

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Recovery initiatives

Political: GSDI, NSDI, EGII (GI2000), etc.;

Technological: open formats, but mainly open APIs;

OGC (Open GIS Consortium®);

However the interoperability through geodata exchange willsurvive for a while.


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Requirements

User needs: locate the data; determine (with metadata) if data meet own needs; request data processing (e.g. filter, project, clip); transfer and import data onto own GIS applications;

Organizational needs: cataloguing data (with metadata); making metadata and data available on the network; setting a legal framework for sharing data (and costs);


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GIS Broker: “bridge” from Metadata to Data

Client/Server architecture for cataloguing, processingand downloading heterogeneuous geodata on the Internet.

Inner view:

proprietary Client (ArcView®) LAN catalogue; Web Client WAN catalogue server (Informix®); ASCII metadata import/export (keyword-value pairs); “open” Geodata Server (ArcInfo®, O2®, others);


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Network (WAN or LAN)

Data User Tool (DUT)

Administator Tool (DAT)

Application 1 Application n

Data User 1 Data User n

Administrator

Requests Manager

Transformer Transformer

...................

O2Data Base

Arc InfoData Base

DataDistributor

Data Provider

Heterogeneous Geodata

= GDS Request

= GDS Delivery

= Raw and stored GDSD descriptions

Spatial Indexing Server (DDT)

Data User Tool (DUT)

PC or UNIX

DataCatalogue(On line)

...................


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Client functions (on metadata):

attribute search (e.g. date > 01/01/94, type=“vector”); spatial search by gazetter (e.g. within “Tuscany”); spatial search by Area Of Interest (AOI); spatial search by computed AOI; show attributes (e.g. CEN/TC 287); show browse graphic; show spatial domain (footprint);


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Geodata retrieval options:

geographical objects (default: all); attributes (default: all); attribute values (default: no filter); export format (default: source); datum/projection (default: source); clip area (default: full extent);

notification of geodata URLTransformerTransformer

Client

WAN

GeodataServer

Transformer

ArcInfo O2

genericquery

retrievedgeodata

specificquery

specificquery

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Funding:

ESPRIT project GEO2DIS (8017, EC DGIII); Telematics project GeoMed (2037, EC DGXIII); GIS-HighWays (IMI), indirectly; MUIS (ESA/ESRIN), indirectly;

Next future:

tackle the CEN/TC 287 - ISO/TC 211 dilemma; metadata interoperability (e.g. UML/XML); towards an unified infrastructure (e.g. with ESA services); exploit the interoperable GISs (when available);

“Cataloguing, Processing and Downloading heterogeneous geodata on the Internet” by Andrea Musone...

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