Enhancing Data Discovery, Understanding and Usage through an Air Quality Metadata System

ISRSE, 6 May 2009

The Palazzo dei Congressi di Stresa

Stresa, Italy

Erin Robinson, R.B. Husar, S.R. Falke, E.T. Habermann, S. Nativi, A. Warnock, M. Hogeweg, J. Lieberman

Goals of AIP II for Air Quality

• Test and evaluate the GCI for AQ applications.

• Registering and retrieving AQ data through the Clearinghouse

• Connect AQ Applications to GCI

Emission

Surf. Obs.Satellite

Model

Population

Informing the Public

Enforcing Standards

Hemispheric Transport

Real-time Service

Regulatory Analysis

Policy Assessment

Air Quality & Health Applications

Observing Systems

Atmospheric Composition

Science & Education

Hurdles

“The user cannot find the data;

If he can find it, cannot access it;

If he can access it, ;

he doesn't know how good they are;

if he finds them good, he can not merge them with other data”

The Users View of IT, NAS 1989

SOA ActionsActions: Register– Discover -Access

UserProvider

Broker

The data reuse is possible through the service oriented architecture of GEOSS.

SOA Actions

Actions: Register– Discover -Access

UserProvider

Broker

The data reuse is possible through the service oriented architecture of GEOSS.

SOA Actions

Register Metadata

Actions: Register– Discover -Access

UserProvider

Broker

GEOSSClearinghouse

SOA Actions

Access Data

Actions: Register– Discover -Access

Discover Get Access

UserProvider

Broker

GEOSSClearinghouse

SOA Actions

Access Data

Actions: Register– Discover -Access

Discover Get Access

UserProvider

Broker

GEOSSClearinghouse

The result is a dynamic binding mechanism to create loosely-coupled work-flow applications.

Register Metadata

Preparation of Data and Metadata

MetadataData

Data Protocol

WMS, WCS (netDCF CF) + conventions

UserProvider

GEOSSClearinghouse

Access

Preparation of Data and Metadata

Register Metadata

MetadataData

Data Protocol

WMS, WCS (netDCF CF) + conventions

Metadata

ISO 19115 subset for Geospatial Data

UserProvider

GEOSSClearinghouse

Air Quality Metadata Record

Discover, Get Access Key

UserProvider

GEOSSClearinghouse

OGC CSW Queryable

Air QualitySpecific

ISO 19115CSW Profile

OGC CSW Returnable

MetadataDescription

Data Binding

Metadata for Finding and Accessing Data

Register Data Service

Registration via GetCapabilities to ISO 19115 translation

AQ Community CatalogWeb Accessible Folder

ISO record for each Dataset

Data Protocol

WMS, WCS (netCDF CF) + conventions

Metadata

ISO 19115 subset for Geospatial Data

Register Metadata

MetadataData

UserProvider

GEOSSClearinghouse

Catalog Registration in GEOSS Registry

AQ Community CatalogWeb Accessible Folder

ISO record for each DatasetRegister

Metadata

MetadataData

UserProvider

GEOSSClearinghouse

GEOSSRegistry

Register in CSR

QueryCatalogs

Register Data Service

Registration via GetCapabilities to ISO 19115 translation

AQ Community CatalogWeb Accessible Folder

ISO record for each Dataset

Data Protocol

WMS, WCS (netCDF CF) + conventions

Metadata

ISO 19115 subset for Geospatial Data

Periodic harvest

Register Metadata

MetadataData

UserProvider

GEOSSClearinghouse

Search for AQ Data

AQ-Specific Filter

Community Portal

Provider

GEOSSClearinghouse

Coarse Filter

OGC CSW Queryable

OGC CSW Returnable

Data Binding

Refined Search for AQ Data

AQ-Specific Filter

Community Portal

Provider

GEOSSClearinghouse

Coarse Filter

Refined Search

OGC CSW Queryable

Air QualitySpecific

ISO 19115CSW Profile

OGC CSW Returnable

MetadataDescription

Data Binding

Next Steps:

• Continue to work with AQ community to improve the AQ-specific sections needed for sharper discovery

• Work with AQ data providers to register their services in the AQ Community Catalog

• Extend metadata unstructured user-contributed content through DataSpaces

Airnow DataSpace

Dataset Description

Dataset Discussion

Summary

Discover: CSW/RSS/ISO

Access: WMS/WCS

Register: ISO Metadata

UserProvider

GEOSSClearinghouse

• Existing data and metadata standards now allow the application of SOA to air quality

• Over 30 air quality datasets are registered and accessible through the GCI

Acknowledgements

George Percivall, OGC

GEO Clearinghouses and GEO Portals:• ESRI• USGS• Compusult

Links

• ESIP AQ Cluster• AQ Community Portal | ISO 19115 AQ Metadata Editor• AQ Community Catalog | AQ Client Browser