Distributed Voyager (DVoy) Web Services .
-
Upload
gwenda-pearson -
Category
Documents
-
view
213 -
download
0
Transcript of Distributed Voyager (DVoy) Web Services .
Distributed Voyager (DVoy) System
Layered Map
Time Chart
Providers Users
Vector
GIS Data
Databases
SQL Tables
WebImages
Voyager Web Services
Publish, Find, Bind
Data & Tool Catalog
Uniform Access
Scatter Chart
Select, Explore, Process, Analyze multidimensional
data
Maintain Distributed Data; Heterogeneous coding , access
Connect providers to users; Homogenize data access
http://capita.wustl.edu/dvoy_services/dvoy.aspx
Web PublishHTTP, FTP
Data & Tool Access though a Web Service Wrapper
Service Broker
Publish
Service Consumer
Find
Access
Ordinary web content can be delivered as a Web Service through a Proxy Server.
• The Wrapper Service converts HTTP/FTP service to XML Web service
• The Wrapper Service is published as a web service to the Broker
• The User finds the service from the broker and accesses the Wrapper to use the service
Service Wrapper
HTTP/FTP
ServiceService
User Chain
Smoke Management Application
A web services based network is well suited to address these needs.
• It allows current data and tool providers to join a fire emissions network with minimal impact on their current operations
• It provides facilities for analyzing data (observation, model output, imagery, etc.) and generating value added information using web-based tools
• It serves as a platform that can easily be adapted for multiple user interfaces (e.g., simple public interface and more complex interface for fire managers)
The fire emissions community needs an integrated network of data and tools for:
• integrating disparate, heterogeneous fire emissions related data
• projecting the impact of fire emissions
• historical analysis of fire emissions
• communicating fire emissions information to agencies, researchers, and the public
Current DVoy User Interface Components
Catalog: User selects among distributed ‘wrapped’ data
Map View: Displays Selected Data
Control Panel: Provides user with facilities to customize display
NOTE: The data sources are physically located on multiple databases across the country (NASA SQL, CIRA SQL, NOAA SQL …) Terry, the powerplant data could be handled in a similar fashion from the EPA Oracle database
Idaho Fires Example (August 2000)
ASTR Fire Locations
SeaWiFS Imageshowing smoke dispersion
DVoy settings can be saved for future use. To view a live display of Idaho fires go to: http://capita.wustl.edu/dvoy_services/dvoy.aspx?layxml_file=IdahoFiresAug192000.xml
Satellite imagery and satellite fire observations are spatially integrated to show fire sources and smoke transport
Idaho Fires Example (August 2000)
ASTR Fire Locations
Processed SeaWiFS imageshowing aerosol optical depth
Derived aerosol optical depth provides a focused look at smoke dispersion
The SeaWiFS reflectance image is hidden to expose the aerosol optical depth image ‘below’ it
Overlaying PM2.5 Concentration Data
http://capita.wustl.edu/dvoy_services/dvoy.aspx?layxml_file=IdahoFiresWithIMPROVEAug192000.xml
PM2.5 data from the IMPROVE and AIRS database at Colorado State provide supporting evidence for smoke impacts
Moving the cursor over the PM2.5 locations shows the lat, lon, and concentration for that monitor
Live version at:
Other Saved DVoy ‘Views’
Global Fire & Aerosol Map
Idaho Smoke & Fires August 15, 2000http://capita.wustl.edu/dvoy_services/dvoy.aspx?layxml_file=IdahoFiresAug152000.xmlIdaho Smoke & Fires August 19, 2000http://capita.wustl.edu/dvoy_services/dvoy.aspx?layxml_file=IdahoFiresAug192000.xmlIdaho Smoke & Fires August 22, 2000http://capita.wustl.edu/dvoy_services/dvoy.aspx?layxml_file=IdahoFiresAug222000.xmlIdaho Smoke & Fires August 25, 2000http://capita.wustl.edu/dvoy_services/dvoy.aspx?layxml_file=IdahoFiresAug252000.xml
Idaho Fire & Smoke Aug 19, 2000 with CIRA PM2.5
http://capita.wustl.edu/dvoy_services/dvoy.aspx?layxml_file=IdahoFiresWithIMPROVEAug192000.xml
PM25 US June 27, 2001
These URLs link to other live views that may be of interest.
Future Functionality
The current state of DVoy uses state-of-the art technologies in integrating data from heterogeneous databases and web mapping tools similar to those used in other ongoing projects such as Chaitan Baru’s I2T project and the OpenGIS Consortium’s Interoperability Program.
Current technology allows relatively simple access and viewing of data. Future research will extend beyond the sharing and viewing of data and will develop new functionality for working with and processing the shared data.
New functionality currently under development include
• a time series display
• simple spatial interpolation tool for generating contour plots
These two additions will provide a proof of concept for proposing more advanced facilities in working with fire emissions related data and tools.
DVoy and B-RAINS Interoperability
BlueskyRAINS
DVoy
Other Fire/Smoke Web Tools and Portals
FASTRACS
PFIRS (California)
B-RAINS and DVoy will use Open GIS Consortium (OGC) standards to interoperate.
B-RAINS uses ESRI ArcIMS WebGIS which has a built-in OGC connector.
DVoy already has the capability to access OGC compliant tools and, in the near future, will be accessible by other OGC compliant applications.
Other Fire/Smoke
Data