Distributed Voyager (DVoy) Web Services

http://capita.wustl.edu/dvoy_services/dvoy.aspx

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