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102nd OGC Technical Committee Delft, The Netherlands

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Presentation on theme: "102nd OGC Technical Committee Delft, The Netherlands"— Presentation transcript:

1 QGIS / GDAL GML application schema support update : use case on French groundwater monitoring system
102nd OGC Technical Committee Delft, The Netherlands S.Grellet – M.Beaufils BRGM 20 March 2017 Copyright © 2017 Open Geospatial Consortium

2 Overall context reminder
NO DATA ? NO CLIENT « another approach to demonstrate the usefuleness of interoperable standards »  or « having something to show to those who consider XML is not sexy » Because - structure: we need a common conceptual vision - encode: we need to agree on a shared encoding of that vision - dereference: even if we are efficient on the previous 2 ones a lot will happen when dereferencing those links. What if content negotiation fails because clients asks for something the server does not understand or ask it in a way the server does not understand (for example passing a 'profile' parameter as suggested by ). Copyright © 2017 Open Geospatial Consortium

3 Overall context reminder
Initial idea Reuse information available in XML compliant to xsd(s) to handle those flow with no hardcoded configuration -> enriched XML and database generation on the fly. Koblenz 2016 Hydro DWG Workshop presentation of the Proof Of Concept QGIS plugin Name: gml application schema toolbox XML handling with ad-hoc PyXB code QGIS 2.x GUI to interact with either enriched XML or generated DB Specific widgets to handle WaterML2 timeseries Copyright © 2017 Open Geospatial Consortium

4 Overall context update
From the ProofOfConcept to an enhanced approach run n 2016 2017 Run n° 1 QGIS 2.x GML application schema toolbox POC GML App Schema OGR Driver and QGIS 3 integration Run n°2 Run n°3 (now) GML App Schema OGR Driver and QGIS 3 integration enhancements Copyright © 2017 Open Geospatial Consortium

5 Overall context update
From the ProofOfConcept to an enhanced approach run n Run n° 1 QGIS 2.x GML application schema toolbox POC GML App Schema OGR Driver and QGIS 3 integration Run n°2 PyXB -> specific OGR/GDAL GMLAS driver (targetting GDAL 2.2), handling both reading and writing Integration within QGIS 3 - GDAL GMLAS : addition handling specific SWE types based on GWML2 GW_GeologyLogCoverage and EU Air Quality Reportings (dataArray, dataRecord, …) - QGIS 3 : enhanced widgets for timeseries, and borehole logs + some commit to the trunk Run n°3 (now) GML App Schema OGR Driver and QGIS 3 integration enhancements 2.2 3 Copyright © 2017 Open Geospatial Consortium

6 Application to groundwater monitoring system
Objectives To provide stable and resolvable links to resources To allow reference / data citation Independant from underlying technologies used to provide data I am #Piezometre/00634X0147/PZ1.2 attached to #Borehole/00634X0147/PZ1.2 I have a lot of #GroundWater Levels observations regarding #EntiteHydroGeol/107AK01 I am #Piezometre/00634X0147/PZ1.2 attached to #Borehole/00634X0147/PZ1.2 I am #EntiteHydroGeol/107AK01 I am monitored by #Piezometre/00634X0147/PZ1.2 I am #EntiteHydroGeol/107AK01 #GroundWater Levels obs. from #Piezometre/00634X0147/PZ1.2 Copyright © 2017 Open Geospatial Consortium

7 Application to groundwater monitoring system
Flows based on OGC and INSPIRE defined featureTypes Env. Monitoring Facility monitoring equipment attachedTo GroundWater raw levels hasObservation relatedMonitoringFeature Borehole GroundWater validated levels Geology / HydroGeology featureOfInterest Observations/ Geological logs relatedObservation featureOfInterest xx Legend: Feature(s) Observation(s) Copyright © 2017 Open Geospatial Consortium

8 Application to groundwater monitoring system
Object instances are associated by their URI Env. Monitoring Facility URI GroundWater raw levels URI Borehole GroundWater validated levels Geology / HydroGeology URI Observations/ Geological logs URI URI Legend: Feature(s) Observation(s) Copyright © 2017 Open Geospatial Consortium

9 Application to groundwater monitoring system
URI allowing to dereference content exposed by OGC services Env. Monitoring Facility URI WFS GroundWater raw levels URI Borehole SOS WFS GroundWater validated levels Geology / HydroGeology URI Observations/ Geological logs URI SOS URI WFS SOS Legend: Feature(s) Observation(s) Copyright © 2017 Open Geospatial Consortium

10 GML application schema toolbox use
Retrieves objects of interest described according to a standard = semantic and geographical representation interacts with the content (XML and Database). Database -> plug other tools Resolves XLinks to add more content vocabulary registry definitions (multilinguism is handled) linked domain features / observation Uses custom widgets working: Waterml 2 timeseries, Inspire PointTimeSeries on-going dev : GW_GeologyLogCoverage, EU AirqualityDirective timeseries Writes content (file not WFS-T) Standalone OGR/GDAL driver -> reuse Copyright © 2017 Open Geospatial Consortium

11 GML application schema toolbox use – QGIS 3
Copyright © 2017 Open Geospatial Consortium

12 GML application schema toolbox use – XML
1 2 Copyright © 2017 Open Geospatial Consortium

13 GML application schema toolbox use – XML
3 Copyright © 2017 Open Geospatial Consortium

14 GML application schema toolbox use – DB
Exact same entry flow but client in database mode Copyright © 2017 Open Geospatial Consortium

15 GML application schema toolbox use – ogrinfo
Ex: direct driver access to GroundWaterML2 GW_Well Copyright © 2017 Open Geospatial Consortium

16 Copyright © 2017 Open Geospatial Consortium
Useful links +Documentation, GUI presentation Multilinguism handling on INSPIRE registry: same flow asking for English then Greek definitions Ubuntu VirtualBox to play with QGIS V3 + plugin under Windows Copyright © 2017 Open Geospatial Consortium

17 Copyright © 2017 Open Geospatial Consortium
Conclusion Generic work successfully tested on OGC : GroundWaterML2, GeoSciML4, WaterML2 INSPIRE : EnvironmentalMonitoringFacilities, BioGeographicalRegions, LandCover, ProtectedSites, MineralResources, PointTimeSeriesObservation Our domain colleagues can now finally make use of standardized content  Next steps Address (some) SWE specificities Have more domain widgets Handle other content type (JSON-LD ?) Feel free to use, test, enhance it, propose evolutions Copyright © 2017 Open Geospatial Consortium

18 Conclusion - whishlist
Input data reading Output data writing Data format Data use Input connector GUI-Widget WaterML2 WFS 2 client <XML> GUI-Widget GWML2 BoreholeLog GMLAS GMLAS File GUI-Widget EU AQD TimeSeries PostreGre/GIS Spatialite SOS 2 client More data structures More data structures More domain GUI-widgets Data processing libs GML Application schema toobox Existing Evolution idea Copyright © 2017 Open Geospatial Consortium

19 Copyright © 2017 Open Geospatial Consortium
Thank you Copyright © 2017 Open Geospatial Consortium

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