RPO Data Sharing

1
RPO Data Sharing
Management of visibility and PM
emissions/concentrations requires coordination
among local, state, and federal agencies in the
collection of data, in the analysis of these
data, in forecasting emissions, air pollutants
and their impacts, and in the communication of
information to managers and the public. An
integrated PM Network will offer straightforward
access to existing and new data and tools for
research, assessments and decision-making. The
information resources resulting from the proposed
project would help the community identify and
fill myriad data gaps, facilitate estimation
methods for emissions and air quality impacts,
provide means for comparing emissions methods,
incorporate newly available data such as
satellite imagery, and present information
clearly and effectively to managers and the
public.
2
Federated Information System

• Data producers maintain their own workspace and
  resources (data, reports, comments).
• However, part of the resources are shared
  through a Federated Information System.
• Web-based integration of the shared resources can
  be across several dimensions
• Spatial scale Local global data sharing
• Data content Combination of data generated
  internally and externally

MANE-VU
Private
Shared
WRAP
CEN-RAP
Federated Information System Data,
Knowledge Tools, Methods
Other Federations
VISTAS
Midwest RPO

• The main benefits of sharing are data re-use,
  data complementing and synergy.
• The goal of the system is to have the benefits of
  sharing outweigh the costs.

3
Distributed Voyager (dVoy)
Voyager software allows web-browsing of
distributed multidimensional data sets. The
browser has three major components data access,
navigation and display which interact following
the model-view-controller (MVC) paradigm. The
data access (model) component offers a
homogeneous, read-only access mechanism to a
collection of heterogeneous, autonomous and
distributed information sources. The Voyager
data access uses a global multidimensional schema
consisting of spatial, temporal, parameter and
other dimensions common to environmental data. In
other words, viewed through the eyes of Voyager,
all data occupy a range in the XYZT physical data
space.
4
Wrappers Mediators
The federated data access infrastructure
incorporates the concepts of wrappers and
mediators. The main data access software
components of Voyager are wrappers, which
encapsulate the data sources and remove technical
heterogeneity, and mediators, which resolve the
logical heterogeneity. In order to find, share
and fuse geo-environmental data requires that
data be coded in 4D physical data space. Much of
the wrapping effort consists of providing
appropriate metadata for geo-spatio-temporal
coding of heterogeneous, uncoded data on the web.
In Voyager, all data are modeled as points (data
granules) in a multidimensional data space. The
navigation (controller) consists of querying and
displaying selected slices through the data cube,
e.g., a spatial slice (for a specific time)
yields a map, while a time slice (for a given
location) produces a time series. Controllers
attached to each dimension facilitate navigation
to any granule in the data cube within a few
clicks.
5
Web Services
Web services, emerging technologies that allow
for automated data integration and enriched
interfaces for information exploring and
processing, offer capabilities for improving the
exchange of data across the web. A web service is
a self-contained and self-described application,
utility, or other service available over the
Internet using standardized eXtensible Markup
Language (XML) for communication with other
computers and applications. Web services provide
the middleware in information networks that link
distributed heterogeneous data and tools with
their users.
6
dVoy Infrastructure

• Wrappers (middleware that translates
  heterogeneous data) provides access to data
  through a uniform front-end.
• The retrieval of specific data slices required
  by viewing and processing services is controlled
  by the user. The user also decides which wrapped
  datasets to browse and how to stack and display
  the layers.
• Because of the flexibility and adaptability in a
  user-driven infrastructure, we expect the
  proposed infrastructure to support
  decision-making for a variety of policy,
  regulatory, and mitigation needs.

7
Current State of dVoy
The initial Voyager infrastructure browser is
being developed at CAPITA with support from NSF,
EPA, NOAA, MARAMA and others. Given the open,
web services-based architecture, further web
service components for data access, processing
and viewing are anticipated from the community of
developers and users. A dozen relevant
heterogeneous web-based aerosol data were
identified, endowed with web service wrappers and
are being delivered for web browsing through
Voyager. These include ASTR global fire
location data from the European Space Agency,
smoke aerosol pattern from SEAWIFS satellite
data, aerosol chemical composition from the
IMPROVE network, and the ASOS automated surface
visibility monitoring data. Many additional
datasets are anticipated from the user community,
including the large number of OGC-compliant data
layers, which are directly usable by Voyager. The
development of data and interface standards have
made distributed data networks feasible. A
number of networks are being planned based on
these standards, allowing the RPO network to
interact with them. Examples include the OGC
network, ESRI geography network, NASA SEEDS
network, NSF Digital Government network, and
EPAs National Environmental Information Exchange
Network.
8
Multi-source data integration
Spatial integration of four data layers that
together determine that the smoke plume is
elevated and does not impact the surface.
9
Quebec Smoke Plumes July 2002
Linking time, map, and webcam rendering services
would provide spatial, temporal and visual
displays for tracking, analyzing, and presenting
information


10
Integration of surface and satellite data
SeaWiFS Reflectance, PM2.5 in Idaho (Aug 2000)
Derived Aerosol Optical Depth, Fire Locations in
Idaho (Aug 2000)
11
Multi-view Rendering
Linking time, map, and webcam rendering services
would provide spatial, temporal and visual
displays for tracking, analyzing, and presenting
information
12
RPO PM Watch System
Virtual PM Monitoring Dashboard This is a
web-page for one-stop access to pre-set views of
current PM monitoring data including surface PM
monitoring, satellite monitoring, weather and
forecast models. It taps into the on-line data
services of EPA and RPOs, NASA, and NOAA and
provides a comprehensive picture of the current
and recent multidimensional aerosol pattern. The
new technologies for the real time aerosol
dashboard will include the creation of group
viewing and annotation layers. The dashboard will
be crafted from the components in Voyager web
services. Virtual Workgroup Website This is an
interactive website which facilitates the active
participation of diverse members in the
interpretation and discussion of the on-line PM
monitoring data. Virtual workgroup members can
identify and contribute information sources
relevant to the current events (e.g. special
data, web cam images, news reports), contribute
insights on data quality and interpretation and
prepare summary reports on aerosol events during
the events. Air Quality Managers Console The
console helps PM managers make decisions during
major aerosol events. The console delivers a
subset of the PM data relevant to the AQ
managers, which includes the event summary
reports prepared by the Virtual workgroups. The
console manages the watch assignments of human
observers on the Virtual PM Monitoring Console
and issues alerts to AQ managers and other
interested parties.