Low-cost satellite-based products for the Web – the Example of Fire Web Service

Low-cost satellite-based products for the Web – the Example of Fire Web Service Theodor Foerster GeoInfo 2010

Motivation
Real-time sensor data
Network-based data access
Internet & Intranet
Interoperability
Archive
 Enable web-based & interoperable data access for GEONETCast

GEONETCast – satellite-based dissemination system
Free of charge
180 products - different applications
Global products – world-wide coverage
Real-time

Technical Setup – Receiving data

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

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)

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

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

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

Architecture

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>

Client application

Functionality
Query
Map
Inspect

Integration of crowd-sourced information
Identify related information through Google GeoCoding Service
Wikipedia
Panoramio

Google Earth integration
Fire events published through KML & NetworkLinks

Implementation
Based on Free and Open Source Software
GeoServer
PostGIS
OpenLayers / GeoExt

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

Thanks for your attention!
swsl.uni-muenster.de /research/geonetcast/
Theodor Foerster
[email_address]

Low-cost satellite-based products for the Web – the Example of Fire Web Service

by Dr. Theodor Foerster on Dec 01, 2010

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Low-cost satellite-based products for the Web – the Example of Fire Web Service — Presentation Transcript

http://swsl.uni-muenster.de	33
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