an ogc standards driven geodata online access for dlrs national remote sensing data library (nrsdl)...
TRANSCRIPT
An OGC Standards Driven Geodata Online Access for DLR‘s National Remote Sensing Data Library (NRSDL)
Torsten HeinenGerman Remote Sensing Data Center (DLR/DFD)
CEOS WGISS-24 MeetingsOberpfaffenhofen, 17th October 2007
Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 2Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 2CEOS WGISS 24, Oberpfaffenhofen, 17 Oct 2007 Slide 2
Outline
NRSDL
Overview
DIMS Components
Context of and Motivation for Geospatial Data Access
Users, Projects and Infrastructures
Geospatial Data Access
Candidate Datasets
Access Control
Architectural Overview
Conclusion
Outlook
Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 3Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 3CEOS WGISS 24, Oberpfaffenhofen, 17 Oct 2007 Slide 3
NRSDL Overview
National Remote Sensing Data Library
Supports numerous missions
National
European
International
Continuous integration of future missions
NRSDL based on DIMS components
E.g. EOWEB® User Interface
SRTM CHAMP TERRAAirborne Imaging ENVISAT
METOP TerraSAR-X TanDEM-X EnMAP
Currently about50 processing systems60.000 product transfers per month100 product types1,000,000 products6.7 Mio. files200 TByte of data
Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 4Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 4CEOS WGISS 24, Oberpfaffenhofen, 17 Oct 2007 Slide 4
Functionality
Cataloging & ArchivingProcessing & ProductionOrder ManagementDeliveryOnline Access
Classical Asynchronous Catalog Ordering Service
Browse, search and order existing and future products through Web-Gateway and CIPAccess of ordered data through FTP (or CD/DVD)
Data Information and Management System (DIMS)
Direct access to primary data via standardized interfaces not yet implemented
Product Library
Processing SystemIngestion System Post-Processing
EOWEB® User InformationService
PickupPoint
User Systems
PickupPoint
Online/OfflineProd. Gen.& Delivery
OperatingTool
Monitoring& Alarm
DIMS
Data FlowControl Flow
ProductionControl
Ordering Control
UIS Loader/Interface
Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 5Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 5CEOS WGISS 24, Oberpfaffenhofen, 17 Oct 2007 Slide 5
Context and Motivation for Service-Oriented Data Access Users
Commercial
Scientific
Public
Government
Spatial Data Infrastructure Programs
GDI-DE, INSPIRE, other SDIs
Projects and Initiatives
HMA (ESA)
GMES (EU)
GITEWS (GFZ/DLR)
WISDOM (DLR)
International Charter for Space and Major Disasters (ZKI@DLR)
WDC-RSAT (DLR)
ZKIWDC
Product LibraryArchiveInventory
DIMS
Processing Systems
User Information Services EOWEB®
OGC W*SInterfaces
Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 6Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 6CEOS WGISS 24, Oberpfaffenhofen, 17 Oct 2007 Slide 6
Standardized Interfaces and Common Software
Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 7Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 7CEOS WGISS 24, Oberpfaffenhofen, 17 Oct 2007 Slide 7
Candidate Datasets for Online AccessCurrently evaluated datasets (prototype)
SRTM X-SAR (restricted access)
Dted2 DEM & HEM
NOAA AVHRR L3
SST, LST, NDVI
Daily, weekly & monthly
ERS GOME L3+
Atmospheric Trace Gas Concentrations
Historical and Forecasts
Potential further datasets(data policies still to be clarified)
METOP GOME2
Enhanced ERS GOME (more trace gases, higher resolution)
TerraSAR-X / TanDEM-X
Radar Imagery
Dted3/4 DEM @ <12m / <6m
EnMAP
200+ bands hyperspectral @ 30m
Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 8Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 8CEOS WGISS 24, Oberpfaffenhofen, 17 Oct 2007 Slide 8
Access Control Requirements
Commercial datasets dissemination
Access control, accounting and new price models are mandatory
“Satellitendatensicherheitsgesetz – SatDSiG” ~ Satellite Data Security Law
Restrict access to high-resolution satellite data (such as TerraSAR-X)
Check user, country of origin, AOI, etc. before dissemination Commercial
Online Data Access must therefore be restricted
Service for policy, rule and license management as well as permission check
Up-to-date (and easy updateable) dataset of administrative boundaries
GeoXACML specifies access control with geospatial operators
GeoXACML adopted by OGC [07-026] Currently in RWG
Allows restriction on AOI, user attributes, layer/dataset, resolution, specific features, etc.
Authentication & Authorization through OASIS SAML and (Geo)XACML
Spatial security checks can be backed up by WFS(-T)
Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 9Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 9CEOS WGISS 24, Oberpfaffenhofen, 17 Oct 2007 Slide 9
Geospatial Data Access Architectural Overview
EOWEB® User Information Service
User Systems
DIMS
Data FlowControl Flow
GeoPEP(OWS-Proxy-Service)
forward or deny OWS request
CSW WMS WCS WFSFTP
Policy &Rule GeoServices
(OWS Service Implementations)
Swaths,Futures,
etc
EO Products &Datasets
Static GeospatialDatasets
Restricted Areas &
AdministrativeBoundaries
GeoPDP(Security-Service)
check request, user & aoi
IngestionService
Ingest, register, secure, publish
GDAS
CSW WMS WFSWCSWFS-T
Product Library
User
User Service
authorize user
Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 10Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 10CEOS WGISS 24, Oberpfaffenhofen, 17 Oct 2007 Slide 10
ConclusionMission: “To develop new and utilize existing software and services to provide a highly configurable, modular and secure "Corporate Spatial Data Infrastructure" that enables standardized access to and management of geospatial data.”
Besides classical FTP dissemination, direct data access will be established to
Facilitate interoperability
Reach more users, collaborate and contribute datasets on different levels
Provide inherent add-on services like visualisation, filtering, mapping, reprojection, aggregation and subsetting
Challenges and limitations
Access Control
Authentication and Authorization not yet standardized for OWS (but GeoXACML looks promising)
Provide decent performance while restricting access and perform security checks!
Administration of complex rules and policies as is quite complicated
Cope with different „standard flavours“, aka profiles
Only L2+ products
Share security subsystem between GDAS und EOWEB
Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 11Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 11CEOS WGISS 24, Oberpfaffenhofen, 17 Oct 2007 Slide 11
Outlook
Phase 1 (Q1 2008): Access services for public and free datasets
WFS(-T) for swath coverages, future products and security
WCS for data retrieval and basic post-processing
CSW / WMS for browsing, portrayal and EOWEB integration
Phase 2 (Q2-3 2008): Access control and accounting for OWSs
Portal, PEP and PDP as a baseline for commercial and restricted datasets
Phase 3 (Open): Study and possible adoption of SWE
Sensor Planning Service (SPS) for product tasking & ordering
Sensor Alert Service (SAS) / Web Notification Service (WNS) for notifications on new datasets, content trigger services (fires, floods, etc.)
SensorML for sensor metadata description
Sensor Oberservation Service (SOS) / O&M for raw (L0/1) data
Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 12Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 12CEOS WGISS 24, Oberpfaffenhofen, 17 Oct 2007 Slide 12
Thank you for your attention!
Maybe [email protected]
Questions?Questions?