Low-cost satellite-based products for the Web – the Example of Fire Web Service
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The document discusses a Fire Web Service that provides interoperable web access to real-time satellite-based fire detection data from GEONETCast. The service uses open standards like WFS and KML to allow querying and mapping of fire events detected from MODIS data. It is implemented using open source software like GeoServer and PostGIS to enable free and web-based access to both real-time and historical fire data globally.
![MODIS data
• Moderate Resolution Imaging
Spectroradiometer [Justice et al. 1998]
• Operated by NASA
– Surface Reflectance
– Land surface temperature
– Vegetation index
– Fire Products [Giglio et al. 2002]
– Land Cover
– Biological productivity](https://image.slidesharecdn.com/geoinfo2010gnc-101201055001-phpapp01/85/Low-cost-satellite-based-products-for-the-Web-the-Example-of-Fire-Web-Service-8-320.jpg)
Low-cost satellite-based products for the Web – the Example of Fire Web Service
- 1. Low-cost satellite-based products for the Web – the Example of Fire Web Service Theodor Foerster GeoInfo 2010
- 2. Motivation • Real-time sensor data • Network-based data access – Internet & Intranet • Interoperability • Archive Enable web-based & interoperable data access for GEONETCast
- 3. GEONETCast – satellite-based dissemination system • Free of charge • 180 products - different applications • Global products – world-wide coverage • Real-time
- 4. Technical Setup – Receiving data
- 5. Interoperability • Establish common understanding on concepts • Web Services – Common interfaces available through the Web – HTTP & XML • Open Geospatial Consortium – Not-for-profit – international voluntary consensus standards organization
- 6. OGC Web Feature Service • Web Services for feature data on the web – HTTP & XML – GML – Features can be queried by featuretype – Query is expressed through Filter Encoding • Operations – GetCapabilities – DescribeFeatureType – GetFeature – Insert (WFS-transactional)
- 7. Technical setup – Web GEONETCast data server OGC Web Coverage Service OGC Web Map Service Clients getMap getCoverage Query real-time and historic data through interoperable Web Services OGC Web Feature Service getFeature GML / KML
- 8. MODIS data • Moderate Resolution Imaging Spectroradiometer [Justice et al. 1998] • Operated by NASA – Surface Reflectance – Land surface temperature – Vegetation index – Fire Products [Giglio et al. 2002] – Land Cover – Biological productivity
- 9. FireWebService • Desaster management • Based on MODIS fire product (mod 14) • Identify potential fires – Fire detection algorithm – Raster fire events as points – Confidence value • Processed from GEONETCast data
- 10. Architecture
- 11. Data insert <wfs:Insert> <de.fws:modisfiredata> <de.fws:the_geom> <gml:Point> <gml:coordinates decimal="." cs="," ts""> 168.143,-16.252</gml:coordinates> </gml:Point> </de.fws:the_geom> <de.fws:appearancedate>2010-06- 21T15:13:21Z</de.fws:appearancedate> <de.fws:line>1177</de.fws:line> <de.fws:sample>506</de.fws:sample> <de.fws:confidence>100.0</de.fws:confidence> <de.fws:adjcloud>0</de.fws:adjcloud> <de.fws:adjwater>0</de.fws:adjwater> ... <de.fws:stddevdt>1.2</de.fws:stddevdt> </de.fws:modisfiredata> </wfs:Insert>
- 13. Functionality • Query • Map • Inspect
- 14. Integration of crowd-sourced information • Identify related information through Google GeoCoding Service • Wikipedia • Panoramio
- 15. Google Earth integration Fire events published through KML & NetworkLinks
- 16. Implementation • Based on Free and Open Source Software • GeoServer • PostGIS • OpenLayers / GeoExt
- 17. Conclusion • Web-based access to GEONETCast data – Real-time & historical data – Fire Web Service • Interoperability – WFS & KML • Free and Open Source Software – GeoServer, GeoExt, OpenLayers • Open issues – Performance & endurance – Validation of results
- 18. Thanks for your attention! swsl.uni-muenster.de/research/geonetcast/ Theodor Foerster theodor.foerster@uni-muenster.de