Implementing GeoDRM support in an OpenLayers based viewer Access to the French geoportal WMS-C services from the Spanish SDI

Transcription

1 INSPIRE Conference 2011 Implementing GeoDRM support in an OpenLayers based viewer Access to the French geoportal WMS-C services from the Spanish SDI R. Béjar, M. Á. Latre, J. Valiño, F. Javier Zarazaga-Soria, P. R. Muro-Medrano June 28, Edinburgh Advanced Information Systems Laboratory (IAAA)

2 Agenda DRM OGC GeoDRM IDEE: Spain NSDI IDEE map viewer Géoportail WMS-C services Solution in the IDEE map viewer Architecture Implementation Conclusions

3 Digital Rights Management (DRM) It refers to the technologies used to limit the uses of digital contents to those intended by their providers

4 OGC GeoDRM The OGC GeoDRM reference model describes an abstract model for DRM for geospatial resources It is an abstract model: high level terms, definitions etc. agreed by the OGC members Not an implementation specification: different implementations!

5 IDEE: Spain NSDI Coordinated by the National Geographic Council SDI Commission Geoportal: Development led by the IGN (Spain National Geographic Institute) OGC and ISO standards Services: WMS, WMS-C, CSW, Gaz, WFS, WCS, SLD, WMC, WCTS, WPS, FTP Horizontal interoperability with French, Portuguese and Andorran geoportals This includes adding some of their WMS and WMSC services to the IDEE map viewer

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7 IDEE map viewer Based on OpenLayers Which supports WMS-C services, but not GeoDRM Highly customized user interface and added functionalities

8 Géoportail WMS-C services France geoportal (Géoportail): API Géoportail: WMS-C is OSGeo Web Map Service - Cached specification Access to tiled maps through an interface that is a profile of OGC WMS Several WMS-C from the Géoportail services can be used, but they are protected by an implementation of GeoDRM

9 Solution architecture IDEE Viewer : Application Request Session Token (request includes API key ) Géoportail Token Server : ApplicationService Request Map Tiles (request includes API session token ) WMS -C : PortrayalService

10 Get an API Key Requested by an administrator of your domain Valid only for requests coming from, or REFERERed by, that domain, for 12 months

11 Request tiles from a GeoDRM WMS-C IDEE Viewer : Application Géoportail Token Server : ApplicationService Do I have an API session token? WMS -C: PortrayalService

12 Request tiles from a GeoDRM WMS-C IDEE Viewer : Application Request new API session token Géoportail Token Server : ApplicationService Do I have an API session token? No WMS -C: PortrayalService

13 key= &output=xml <token name="gppkey"> gc2uzgur_jji5nm7qkn5hqg06peaaaaaa AHWLRe_BD6d4QTVAAABHiB QmEAAAAAAAlgAAQECvZr3ME_66sRrEAaA wzqaaem0aadctaaaqrqaaa </token>

14 Request tiles from a GeoDRM WMS-C IDEE Viewer : Application Set timer to request next session token (10 min.) Géoportail Token Server : ApplicationService Do I have an API session token? No WMS -C: PortrayalService

15 Request tiles from a GeoDRM WMS-C IDEE Viewer : Application Géoportail Token Server : ApplicationService Do I have an API session token? WMS -C: PortrayalService

16 Request tiles from a GeoDRM WMS-C IDEE Viewer : Application Do I have an API session token? Yes Géoportail Token Server : ApplicationService Request tile WMS -C: PortrayalService

17 &gppkey=gc2uzgur_jji5nm7qk N5hQG06pEAAAAAAAHWLRe_BD 6d4QTVAAABHiB QmEAAAAAAAlgAAQECvZr3ME_6 6sRrEAaAwzQAAEM0AADCtAAA QrQAAA &...

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19 Conclusions There is a working implementation of GeoDRM in the Géoportail WMS-C services The Open Layers based IDEE map viewer has been adapted to support the Géoportail GeoDRM implementation for WMS-C services In order to improve horizontal interoperability between IDEE and Géoportail As OGC GeoDRM is an abstract specification, details will be different in different implementations The solution may not be reusable

20 Rubén Béjar? Advanced Information Systems Laboratory (IAAA) IAAA is currently a partner in the EuroGeoSource project