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Jonas Eberle 9th November 2015 1
Standard-based time-series data access and
geoprocessing services for Earth cover change
detection within the “Earth Observation Monitor”
Jonas Eberle
Friedrich-Schiller-University Jena
Institute for Geography, Department for Earth Observation
Jena, Germany
Jonas Eberle 9th November 2015 2
Data providerData providerWeb servicesWeb services
Introduction
What is necessary when developing an app based on spatial time-series data?
Apps
Anal
ysis
Apps
Mon
itorin
gAc
cess Data extraction
Algorithm execution
Supervision of time-
series data and analysis
Jonas Eberle 9th November 2015 3
Can GEOSS support us in accessing data?
Jonas Eberle 9th November 2015 5
WPS for data discovery
Landsat and Google Earth Engine example
http://artemis.geogr.uni-jena.de/cgi-bin/testbox.cgi?service=WPS&version= 1.0.0&request=Execute&identifier=gee_agu_getscenes&datainputs=[wkt=POINT( 11 51);dataset=LANDSAT/LC8_L1T;start=2013-11-01;end=2014-07-20; maxcloudcover=30]
ID; Date; CloudcoverLC81940242013357LGN00; 2013-12-23; 5.4LC81940242014056LGN00; 2014-02-25; 11.03LC81940242014072LGN00; 2014-03-13; 0.2LC81940242014136LGN00; 2014-05-16; 20.73LC81940242014184LGN00; 2014-07-03; 1.46LC81940242014200LGN00; 2014-07-19; 0.94
Jonas Eberle 9th November 2015 6
WPS for data discovery
Sentinel-1 ESA Data Hub – Overlapping areas
http://artemis.geogr.uni-jena.de/cgi-bin/testbox.cgi?service=WPS&version= 1.0.0&request=Execute&identifier=s1_datahub_test&datainputs=[wkt=POLYGON((13.59 55.79, 14.72 55.84, 14.10 58.48, 13.00 58.43, 13.59 55.79)); product=GRD;maxoverlap=70]&rawdataoutput=output
Title, Overlap, Link, GeometryS1A_EW_GRDM_1SDH_20150427T…, 0.94, Download, POLYGON ((...))S1A_EW_GRDM_1SDH_20150427T…, 1.00, Download, POLYGON ((...))S1A_EW_GRDM_1SDH_20150422T…, 0.87, Download, POLYGON ((...))S1A_EW_GRDM_1SDH_20150415T…, 0.94, Download, POLYGON ((...))S1A_EW_GRDM_1SDH_20150415T…, 1.00, Download, POLYGON ((...))S1A_EW_GRDM_1SDH_20150410T…, 0.87, Download, POLYGON ((...))...
Jonas Eberle 9th November 2015 7
WPS for data access
MODIS Vegetation pixel time-series
Output uuid: b5b17389-05d7-4058-9d87-aea05a0234d7
http://artemis.geogr.uni-jena.de/cgi-bin/testbox.cgi?service=WPS&version= 1.0.0&request=Execute&identifier=1013_single_ts_plot_point&datainputs=[datasetName=mod13q1_evi;pointX=13.54;pointY=52.31]
Jonas Eberle 9th November 2015 8
WPS for data analysis
Breakpoints for vegetation time-series
Trends for vegetation time-series data
http://artemis.geogr.uni-jena.de/cgi-bin/testbox.cgi?service=WPS&version=1.0.0&request=Execute&identifier=2010_single_ts_bfast_point&datainputs=[uuid=b5b17389-05d7-4058-9d87-aea05a0234d7]
http://artemis.geogr.uni-jena.de/cgi-bin/testbox.cgi?service=WPS&version=1.0.0&request=Execute&identifier=3010_single_ts_greenbrown_point&datainputs=[uuid=b5b17389-05d7-4058-9d87-aea05a0234d7]
Jonas Eberle 9th November 2015 9
Use case: Earth Observation Monitor
Vegetation time-series data access and analysis
Datasets used• MODIS Vegetation product (MOD13Q1)
250m spatial & 16-daily temporal resolution
• Global availability using Google Earth Engine
Available analysis tools•Trend calculations•Breakpoint detection•Phenological parameters
Client applications•Web portal: www.earth-observation-monitor.net•Mobile application for Android & iOS: mobileEOM
Jonas Eberle 9th November 2015 10
Client Applications: MySeasons Phenology App
MapsMaps Phenology WPSPhenology WPS
GPS
po
sition
Tim
e ch
art
Use
r inp
uts
Map
laye
rs
Map Timeline Collect
App DataApp Data
Web & Processing ServerWeb & Processing ServerIn situ DBPhenologyIn situ DBPhenology
This application will be developed within the MyGEOSS project, which has received funding from the European Union's Horizon 2020 research and innovation programme.
Jonas Eberle 9th November 2015 11
Conclusions & Recommendations
OGC WPS•Standardized web service specification for all kind of processing tasks•Research is needed for common input/output descriptions / specifications
GEOSS•Linking processing services to datasets would be useful!•GCI could provide a WPS client in the portal•Is there a way to search for specific OGC services within GEOSS?•GEOSS broker / mediatorsystem for WPS?
What could be achieved for GEOSS AIP-8?•Registration of WPS services in the GEOSS catalogue!•Make processing services more visible to users (?)
Jonas Eberle 9th November 2015 12
Thank you for your attention!
Questions?
Contact information:
Jonas EberleFriedrich-Schiller-University
Institute for GeographyDepartment Earth Observation
Loebdergraben 3207743 Jena, Germany
phone: +49 3641 94 88 89email: [email protected]
