Distributed Users Scenario
- Problem
- Scenario Domains
- Scenario Sketch requiring Distribution
- Mapping to Technologies Needed
Problem
- The DDB is fundamentally distributed in space, time,
purpose
- data is collected at different locations by different sensors in different
formats with different scales for different purposes
- data is collected at different times and differences are significant
- data includes digital map but also thematic information in equal measure
- expertise to interpret data is distributed
- data consumers are distributed
- intended use of data is very diverse
- DoD - global, tactical, logistical overlay, tracking, …
- commercial - soils, geological, oil and gas, oceans, atmosphere, weather,
property boundaries,
- fundamental spatial index for the Web of knowledge
Scenario from Diverse Domains Possible
- JTF, Logistics (ALP), JFACC
- Disaster Recovery, agriculture, meteorology, oceanography, land use
- CERTs, Virtual Enterprise, Virtual Office, Virtual Situation Room
Scenario Sketch requiring Distribution
- distributed sensors located in battlefield, in air, in
space recording different views of same locations and events. Need to be
able to control some of these.
- expert analysts located on battlefield, at command post, in intelligence
community, DoD subcontractors, in allied countries
- decision makers located on battlefield, at command post, in allied
country
- support distributed into different organizations - logistics, medical,
… - all have geospatial component - where resources are located and where
they need to be and how to get there at what cost, how to aggregate the
move to reduce cost
- all the above want to see a consistent view and need coordination -
overwhelming information superiority = accurate picture of the situation
but without overwhelming detail
Mapping to Technologies Needed
(incomplete list)
- comm - network bandwidth, network management, load balancing,
- representations
- GIS domain information - 100's of vector and raster formats mixing
2D, 3D, thematic, …
- time
- uncertainty
- thematic information of many kinds
- shared schema, oo, relational, wire formats, streams, KIF
- views - relational, oo, visualizations, multiple representations and
consistency maintenance
- database - persistent storage, indexing, oo queries, transactions,
recovery, events
- kbms, I*3 - data source wrappers/gathers, ontologies, rules, agents,
…
- collaboration - email, shared whiteboards, shared data and operations,
groupware, workflow, audio/videoconferencing, collaborative environments
like MUDs and MOOs.
- visualization - 2D, 3D, animated