ELF download services

Transcription

1 ELF download services Presentation to: Author: Date: ELF workshop in Moldova Marcin Grudzień 8 h September September, 2015

2 Plan Introduction Specification documents The envisaged production process

3 Introduction

4 Main principles ELF Download services provide data published in ELF data model Themes: AD, AU, BU, CP, GN, HY, LC, PS, SR, SU, TN, Miscellaneous? Download services published in INSPIRE data model are also acceptable during transitional period ELF data model extends INSPIRE data model Data created in ELF data model is conformant to NSPIRE data model Implementation of ELF data model = implementation of INSPIRE data model However, implementation of INSPIRE data model <> implementation of ELF data model Geographic extend : geographic Europe Main ELF use cases Cascade services Oscari WP6 use cases CRS: pseudo Mercator (EPSG:3857) and LAEA (EPSG:3035)

5 Specification documents

6 Technical Guidance for the implementation of INSPIRE Download Services Contains Requirements for ATOM services implementation Requirements for WFS pre-defined services implementation Requirements for WFS direct access services implementation Quality of service requirements /Network_Services/Technical_Guidance_D ownload_services_v3.1.pdf

7 INSPIRE Data Specifications Provides harmonised data specification for the spatial data themes form Annexes I, II and III of the INSPIRE Directive (AD, AU, BU, CP, GN, HY, LC, PS, SR, SU, TN) Contains Data content and structure description Information about reference systems Data Quality requirements Metadata requirements Delivery requirements Portrayal requirements (for view services) eid/2

8 ELF Data Specifications Provides Extensions to the INSPIRE data models Contains Dependencies between theme packages Overviews of UML models Feature types Data types Code lists Attributes Associations Only specific to ELF Code lists values

9 ELF Application Schemas In general use last available version

10 Other documents Feature Catalogue Mapping tables templates Enterprise Architect models

11 ELF specification documents Draft versions available See also Folder for whole project WP2 Deliverables D2.2 Data Specification Master WP2 workspace folder containing recent versions of documentation

12 Production process

13 Source data for ELF download services: transform existing data to ELF/INSPIRE data model (recommended option) NMCA data ELF ATOM feeds NMCA data Transformation process Harmonised (format xxx) NMCA data ELF WFS Cascading WFS

14 General requirements to National services Should be conformant to INSPIRE network services, follow Technical guidelines Download services View services not required but, relatively easy to setup Must support the two projections EPSG 3857(Web Mercator) and EPSG 3035(ETRS-LAEA)

15 General requirements to National services ELF National services must be well documented: Metadata according to INSPIRE. Discovery service and Metadata IR Capabilities file. INSPIRE Technical Guidance For publication on the ELF platform - use the ELF service information spreadsheet on Projectplace. and/or For users of the ELF platform. Documentation for services and data - On

16 General requirements to National services WFS direct access strongly recommended WFS 2.0.0, GML Optional Atom feeds as supplement to WFSs Data should Be harmonized. Edge matched, quality controlled Use/validate vs. the ELF application schemas

17 Production process Design phase : Work Package 2 Production phase Data model Application schemas Harmonisation of national data to ELF/INSPIRE data models Matching tables : NMCAs Master data : NMCAs Set up WFS and/or ATOM national services using ELF application schemas Master data : NMCAs Documentation of services : NMCAs Connection to Oscari: NLS Finland (FGI)

18 HARMONISATION PROCESS Extraction Transformation Loading National data ETL Tools ELF/INSPIRE data

19 HARMONISATION PROCESS 1 Analyse target data model Carefully read INSPIRE and ELF documentation

20 HARMONISATION PROCESS 2 Identify and choose source data Data content Data Quality Currency Extend Future update plans

21 HARMONISATION PROCESS 3 Create matching tables Do the mappings between source data model and target data model Use ELF matching tables templates EXAMPLE

22 HARMONISATION PROCESS 4 choose ETL tool ELF WP4 provides following ETL tools: Snowflake GO publisher Delft University HALE (open source) However, you can use any other ETL tool available

23 HARMONISATION PROCESS 5 Set up ETL tools Take the matching tables and set up the to ETL tools configuration Test the results of transformation Iterative process Use data samples In general two possible outputs Set up Database (WFS) GML files (ATOM) Validate Transform

24 HARMONISATION PROCESS 6 perform transformation The harmonised data is ready

25 SERVICE INFRASTRUCTURE EUROPE WEB WFS NATIONAL DATA WFS NATIONAL DATA Cascading WFS Query distribution Content aggregation WFS NATIONAL DATA

26 SERVICE INFRASTRUCTURE 1 Prepare Data ELF (recommended) INSPIRE (acceptable)

27 SERVICE INFRASTRUCTURE 2a Create service Software Use what you already have Strong GeoServer community in ELF project ESRI ArcGIS Server and ArcGIS for INSPIRE

28 SERVICE INFRASTRUCTURE 2b Create service DOCUMENTS STRUCTURE ELF Data Model INSPIRE Data Specifications Technical Guidance for the implementation of INSPIRE Download Services ELF applications schemas INSPIRE application schemas

29 SERVICE INFRASTRUCTURE 3 Set Service in production PERFORMANCE SUPPORT AVAILABILITY

30 SERVICE INFRASTRUCTURE 4 Document E/WFS? Authentication Layer name(s) BBOXS

31 WMS TECHNICAL REQUIREMENTS CRS EPSG:3035 EPSG:3857 Formats WFS 2.0.0, GML Extent We must have an extent at the service level to be used in the cascading service.

32 WMS TECHNICAL REQUIREMENTS Data Extent Only data within the land boundary of the country. Authentication Service must be open or available through standard authentication. Performance INSPIRE requirements

33 SEEDING One time job for project UPDATE FREQUENCY No decisions made regarding updates after the lifetime of the project.

34 Examples Polish prototype (CP WFS) Polish prototype (CP ATOM) Polish prototype (CP WMS)

35 Examples Data ProjectPlace

36 Conclusions : possible help marcin.grudzien@codgik.gov.pl (general) saulius.urbanas@eurogeographics.org (general)