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Interoperability and the National Spatial Data Infrastructure (NSDI) Doug Nebert Federal Geographic Data Committee Secretariat
Interoperability and the National Spatial Data Infrastructure (NSDI)
Doug NebertFederal Geographic Data Committee Secretariat
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AgendaStandards and the NSDISpecific role of FGDC
Standards WGParticipation in other bodies, endorsement of external standards
Geospatial One-Stop interestsNSDI as the Enterprise
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Standardization contextDefining solutions based on requirements and standard interfaces and content
encourages market competitioncompetition reduces price and stimulates innovationenables systems integration of servicesreduces vulnerability of monocultural failure
Define operability and interoperability requirements
Functions performed Formats supportedExternal interfacesIncludes semantic content
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Roles of Standardization Organizations
ISO provides general purpose standards and specifications as guidance to implementationIndustry Consortia provide technical implementation specificationsNational/Community groups define common practices, content, and interaction within and outside the group
Geospatial Standardization
OpenGIS OpenGIS Consortium, W3CConsortium, W3C
Software interfaces(ImplementationSpecifications)
ISO TC 211ISO TC 211
Foundations forimplementation.
(Abstract standards)
NationalNationalStandardsStandards
Content standards,Authority for data
Endorsed practices and specifications
SDISDI
OtherNSDIs
RegionalSDI Coordination
GSDI
ISO TC211 Work Items
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W3C ContributionsHTMLHTTPPNGSOAP/XMLPSVGURI/URLXHTMLXLink
XMLXML QueryXML Schema XPathXPointerXSL and XSLTCSSDOM
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Web ServicesOASIS: Not-for-profit global consortium to drive development, convergence, and adoption of e-business standardsWS-I: open, industry organization chartered to promote Web services interoperability across platforms, operating systems, and programming languages.
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OGC SpecificationsSimple Features Access (SQL, CORBA, OLE)Catalog ServicesGrid CoveragesCoordinate Transformation ServicesWeb Map Server InterfacesGeography Markup LanguageWeb Feature ServiceFilter Encoding SpecificationStyled Layer Descriptor
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Options for National Standardization
Data policies and lawsNational profiles of international standards and specifications:
Data Content/Exchange StandardsGeographic Location GazetteerGeodetic Reference SystemsFeature Type Catalogs
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FGDC Standards Working GroupDevelops standards unique to the government’s geospatial interestsFormal proposal, review, balloting, adjudication process for standards relating to data content and common interestFGDC participates in ANSI INCITS national standardization body, OpenGIS Consortium, and W3C
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Framework Data ThemesSeven themes with high re-use potential
HydrographyElevationGeodetic ControlOrthoimageryTransportationCadastralGovernmental Units
Revised OMB Circular A-16 assigns federal lead agency responsibility for over 50 themes
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FGDC Framework StandardsBeing convened via ANSI/INCITS-L1Define core information content to be exchanged by partners for 11 themesIntended to encourage import/export of common packages of geospatial informationExpressed as UML modelsInclude XML/GML representation as Annex
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Recognition of external standardsTwo levels of FGDC recognition:
Endorsement – same status as FGDC standard: mandatory for use, in accordance with Federal guidanceRecommendation – the non-federal standard is recognized as a useful standard, but is not deemed to be of such broad applicability that its use should be mandatory.
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Geospatial Interoperability Reference Model (GIRM)
GIRM published by FGDC Geospatial Applications and Interoperability (GAI) Working Group in 2001GIRM does not contain standards but lists adopted and candidate standardsGIRM endorse standards based on use and implementation
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Structure of the Reference Model
Abstract model: theory -- design principlesImplementation: practice -- software recipes
ViewpointsComputation Information
Service invocation
Information transfer
Abstract models Behavior Content
Implementation Specifications Interface Encoding
What
How Leve
ls o
f ab
stra
ctio
n
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FGDC Privacy/Security Interests FGDC Privacy Policy issued 1998
http://www.fgdc.gov/fgdc/policies/privacypolicy.pdf
FGDC Homeland Security WG: “Guidelines for Providing Appropriate Access to Geospatial Data in Response to Security Concerns”“Mapping the Risks: Assessing the Homeland
Security Implications of Publicly Available Geospatial Information” (RAND Report MG- 142 NGA 2004)
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Framework data standardsMaintain existing data inventory Data acquisition marketplace (Planned data) Bringing quality geospatial Web Services online for multiple usesPortal development
Geospatial One-Stop Project Modules
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GOS Service NeedsRole-based authentication of users for access
to sensitive, commercial, and classified informationBinding to Web services on-the-fly using
existing and emerging standard service typesEstablishment of a standards-based national
geospatial service registry for many usesStreaming complex geospatial information
over the Web, testing compression techniquesSupporting a ‘marketplace’ of providers and
consumers of geospatial data
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GOS Needs of a NetworkBurstable bandwidth for peak usageTransmission of data and ‘pictures’Routing and access based on user rolesReplicated data and servicesSupport for third-party authenticationDistributed processing on distributed data – federated services model
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NSDI: Geospatial EnterpriseCommon data and services interests exist to meet core business area requirements that are related to placeInitiative to articulate multi-agency geospatial enterprise architecture (BRM, TRM, DRM) across all levels of government beginning in September
Supports Geospatial One-StopFormalizes service relationships in NSDI
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Why an NSDI EA?Differences in understanding and
implementing EA in various agenciesEncourage communication between
geospatial business professionals and IT/CIO offices within agenciesImprove communication between agencies
and departments on available services and data backed by BRMIdentify opportunities to fortify and share
common geospatial services across all levels of government
Using the FEA-DRM
FEA-BRM Sub-Functions
PollutionPrevention& Control
EnergyResearch
PublicHealth
Monitoring
RecreationalResource
Management& Tourism
ConsumerHealth &
Safety
Consumer Safety
DOE
Emission
DOINatural Resource
HHS
USDAHealth
Recreation
Cross-Agency Activities
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???
UI
CatalogServicesCatalogServices
Web FeatureServices
Web FeatureServices
Web MappingServices
Web MappingServices
ServiceRegistry/Catalog
ServiceRegistry/Catalog
CatalogClient
CatalogClient
Web ClientWeb Client
Web CoverageServices
Web CoverageServices
Symbols
namename
InterfaceUI
Software/Service
Information
Function
MetadataMetadata contains
queries for registered resources
queries/harvests Z39.50
OGC
makesmapsfrom
managedthrough
Portal EnginePortal Engine
interacts with
scheduler runs
ThesaurusThesaurus
GazetteerGazetteer
enhancesquerywith
requests map from
UI
feedsserver info
to
1. builds query screens for2. submits queries/requests to3. returns search responses
1 2 3
UI
register/update
UImanagedthrough
requests vector GML data from
now: planned.:
are derived for each
providesapplication
accessthrough
WMSWFS
WFSWMSCAT
requests raster data from
WCS
WCS
ApplicationClient
Application Client
MetaDB
harvest copy to
searches
WMSCATWCS OGC Web Coverage Service
OGC Catalog ServiceOGC Web Map Service
WFS OGC Web Feature Service
CAT
WFS
GeospatialEnterpriseServices
July 2004
spatialdata
served by
mapped through
imagery feeds
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Enterprise Architecture ApproachConduct educational outreach with focus on terminology agreementMine existing agency/department EA and geospatial application descriptions and link geo staff with EA staffLead FGDC member agencies will evaluate and describe their business processes and the data defined in their mission business lines – a justification frameworkReference models to be built using platform independent models in a Services-Oriented Architecture Interoperability experiments will be runService-Level Agreements built on found linkages
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Opportunities for partnershipE-government initiatives including
recreation.gov and geodata.govDOI EGIM members Group on Earth Observations (GEO) partnersNASADepartment of Homeland SecurityEnvironmental Protection AgencyUSDAKey state government agencies
