INSPIRE Orthoimagery TWG Status Report Antonio Romeo ESRIN

INSPIRE Orthoimagery TWG Status Report Antonio Romeo ESRIN 15/02/2012 ESA UNCLASSIFIED – For Official Use

Table of contents ● TWG-OI activities overview ● Satellite community interoperability requirements ● Requirements implementation theoretical basis − INSPIRE guidelines for Annex II and III on the usage of O&M − O&M overview ● Requirements implementation proposal ● Conclusion TWG-OI status report | Antonio Romeo | ESRIN | 15/02/2012 | EOP-GSR | Slide 2 ESA UNCLASSIFIED – For Official Use

Thematic Working Group Orthoimagery – Activities up to now ● ● May 2007. European Parliament directive established an Infrastructure for Spatial Information in the European Community (INSPIRE) − INSPIRE addresses 34 spatial themes divided in 3 Annexes − Annex I basic (e. g. CRS), Annex II common (e. g. Orthoimagery), Annex III specific (e. g. Bio-geographical regions) themes April 2010. TWG-OI starts its activity on Orthoimagery − Data specification (application model, metadata, encoding) ● October 2010. Version 1 published for internal consultation ● December 2010. Preparation of version 2 of Data Specification ● June 2011. version 2 of data specification published for public review − Consultation closed on October 2011: 150 comment received − 27 February 2012 comment resolution with version 2. 9 TWG-OI status report | Antonio Romeo | ESRIN | 15/02/2012 | EOP-GSR | Slide 3 ESA UNCLASSIFIED – For Official Use

Thematic Working Group Orthoimagery – Future activities ● February- March 2012. Internal revision of version 2. 9 of Data Specification ● April 2012. Publication of version 3. 0 RC of Data Specification ● April – June 2012. Preparation of Draft Implementing Rule by EC ● July 2012. Consultation of European Commission Inter-Service and INSPIRE Committee Members ● September 2012. Implementing Rule finalization ● October 2012. INSPIRE Committee meeting ● Q 4 2012. Legal Act for Implementing Rule adoption TWG-OI status report | Antonio Romeo | ESRIN | 15/02/2012 | EOP-GSR | Slide 4 ESA UNCLASSIFIED – For Official Use

Satellite community requirements background ● Earth Observation Satellite community has its own interoperability framework and infrastructure based on ISO and OGC standards. ● Earth Observation Satellite community is a data provider of ortho-rectified images. ● Numerous EO users requirements have been collected in the interoperability effort. ● Interoperability obtained through standardization of metadata and services. ● Four key user requirements not completely satisfied by INSPIRE TWG-OI status report | Antonio Romeo | ESRIN | 15/02/2012 | EOP-GSR | Slide 5 ESA UNCLASSIFIED – For Official Use

Satellite community users requirements for EO data [REQ-1] Product origin shall be traceable at product level. [REQ-2] The mapping between metadata of different framework shall be minimized [REQ-3] The metadata provided shall follow a model driven approach [REQ-4] The data model shall be compatible with current web distribution service for coverages TWG-OI status report | Antonio Romeo | ESRIN | 15/02/2012 | EOP-GSR | Slide 6 ESA UNCLASSIFIED – For Official Use

INSPIRE guidelines for O&M usage ● X-TWG OM published guidelines in July 2011 (concurrently with data specification v 2 release) : Guidelines for the use of Observations & Measurements and Sensor Web Enablement-related standards in INSPIRE Annex II and III data specification development (D 2. 9_v 1. 0) ● Identification of Themes for which O&M is relevant as core or auxiliary concept ● The usage of O&M is recommended when provenance and quality information should be provided with the data ● The usage is discouraged when observation metadata is not important to users or providers do not want to give it ● The reference to O&M will satisfy all the requirements: − [REQ-1]: provenance is relevant for users − [REQ-2]: O&M is the base for EO product metadata − [REQ-3]: O&M follows the model driven approach − [REQ-4]: EO-O&M is used in the EO-WCS TWG-OI status report | Antonio Romeo | ESRIN | 15/02/2012 | EOP-GSR | Slide 7 ESA UNCLASSIFIED – For Official Use

The model driven approach ● Defined in ISO TC 211 ● A universe of discourse is modelled formally as a conceptual model in a UML application schema using the General Feature Model of ISO 19109. ● Feature types may be registered in a feature catalogue specified within ISO 19110 for re-use, thus aiding interoperability ● From the UML model a canonical XML encoding can be generated automatically, following encoding rules defined according to ISO 19118, providing a GML application schema as per ISO 19136. ● Used in O&M model definition TWG-OI status report | Antonio Romeo | ESRIN | 15/02/2012 | EOP-GSR | Slide 8 ESA UNCLASSIFIED – For Official Use

O&M overview ● Observation and Measurement is a ISO and OGC standard (ISO 19156, OGC 10 -004 r 3) ● An observation is an event that estimates an observed property of some feature of interest using a specified procedure and generates a result. TWG-OI status report | Antonio Romeo | ESRIN | 15/02/2012 | EOP-GSR | Slide 9 ESA UNCLASSIFIED – For Official Use

O&M UML diagram TWG-OI status report | Antonio Romeo | ESRIN | 15/02/2012 | EOP-GSR | Slide 10 ESA UNCLASSIFIED – For Official Use

O&M principles ● Observation/Method centric modelling approach ● The focus is not on the result but on how it has been obtained ● Useful to identify: ● − Data provenance − Data context − Fitness-for-purpose − Quality Based on the model driven approach TWG-OI status report | Antonio Romeo | ESRIN | 15/02/2012 | EOP-GSR | Slide 11 ESA UNCLASSIFIED – For Official Use

EO application profile of O&M ● OGC standard (OGC 10 -157 r 2) ● Profiling of O&M model to Earth Observation domain ● Modular mechanism to accommodate different sensor/satellite requirements Other Specific Mission EO Products description Specific, tight community Other Thematic EO Products description Mission Specific EO Products … Thematic EO Products OPT SEN 1 SAR ATM General EO Products Generic O&M Generic, widespread community TWG-OI status report | Antonio Romeo | ESRIN | 15/02/2012 | EOP-GSR | Slide 12 ESA UNCLASSIFIED – For Official Use ALT EOP O&M LMB SSP . . .

EO O&M UML diagram “A coverage is the result of an observation” <<Feature type>> Earth. Observation. Result 0. . 1 Coverage 0. . 1 CV_coverage TWG-OI status report | Antonio Romeo | ESRIN | 15/02/2012 | EOP-GSR | Slide 13 ESA UNCLASSIFIED – For Official Use

TWG-OI current application schema ● Based on the Coverage concept (ISO 19123) ● Focused on image type (single, aggregated, mosaicked) ● Tight relationship with Elevation theme ● Core model to be extended by data providers ● No provenance or quality information in the model ● Metadata field not specified (type any) TWG-OI status report | Antonio Romeo | ESRIN | 15/02/2012 | EOP-GSR | Slide 14 ESA UNCLASSIFIED – For Official Use

TWG-OI data model UML diagram TWG-OI status report | Antonio Romeo | ESRIN | 15/02/2012 | EOP-GSR | Slide 15 ESA UNCLASSIFIED – For Official Use

EO-WCS – OI compatibility issues EO-WCS Orthoimagery EO O&M metadata linked to EO coverage Metadata within the product not specified. O&M is applicable according to guidelines. Metadata field cardinality (0, 1) Metadata field cardinality (0, *) Compatibility issues: − Lack of explicit requirements to link Orthoimage. Coverage to Earth. Observation − Different cardinality of metadata field TWG-OI status report | Antonio Romeo | ESRIN | 15/02/2012 | EOP-GSR | Slide 16 ESA UNCLASSIFIED – For Official Use

TWG-OI data model modification ● [I-1] Modify the data model in order to have metadata field cardinality (0, 1) and introduce the class OIMetadata to host Observation and other type of metadata fulfilling all the requirements ● Data producer can use the most suitable application profile of O&M ● Other metadata can be also used ● Limited changes to the current model ● [I-2] Include Orthoimagery to the list of themes for which O&M is relevant contained in the guidelines TWG-OI status report | Antonio Romeo | ESRIN | 15/02/2012 | EOP-GSR | Slide 17 ESA UNCLASSIFIED – For Official Use

Conclusions ● Identification of 4 EO user requirements ● Requirements implementation in line with INSPIRE guidelines ● Requirements implementation proposals: − [I-1] Insert OIMetadata in the application schema − [I-2] Insert Orthoimagery among themes for which O&M is relevant but not core in the guidelines (D 2. 9) TWG-OI status report | Antonio Romeo | ESRIN | 15/02/2012 | EOP-GSR | Slide 18 ESA UNCLASSIFIED – For Official Use