Putting Location into LocationBased Computing Seth Teller GraphicsLCS - PowerPoint PPT Presentation

Title: Putting Location into LocationBased Computing Seth Teller GraphicsLCS


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Putting Location into Location-Based
ComputingSeth TellerGraphics/LCS
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What is location-based computing?

• Application of location-specific information
  about an environment and users within it
• Yes, but

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Location-based computing requires

• 1) A representation of environment, its contents

2) Locating/orienting yourself in representation
3) Operators applications on the representation
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Location-based computing

• 1) A representation of environment, its contents

2) Locating/orienting yourself in representation
3) Operators applications on the representation
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Capturing architectural spaces

• Robotic scene capture outdoors, indoors
• Research effort likely 5-10 years out

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Generating architectural spaces procedurally

• Nearer term 1 to 2 years out
• Idea exploit existing, rich 2D data
  sets(floorplans) maintained by MIT DOF
• Add small amount of extra informationextrude to
  well-formed 3D CAD modelwith interior detail,
  furniture, etc!
• Joint work with Berkeley graphics group

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Initial 2D floorplan
Layers exterior/interior walls text
icons Physical plant has economic incentive to
maintain
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Analyze for spaces, room labels, etc.
Now have offices, corridors, interstitial spaces
c
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Extrude to 3D
Doorjambs, raised floors, dropped ceilings, c.
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Add vertically connecting elements
Stairs, elevators, airshafts, ducting etc.
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Add procedural lights, furnishings
Override locally with per-user schema or specifics
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Generating architectural spaces procedurally

• Collaboration with MIT DOF
• Models are live weekly, batch update
• Provide resulting maps, models to Oxygen

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Status and Plans

• Extrude exterior basemap using building heights

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Status and Plans

• Extrude every floor of every building at MIT

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Location-based Computing
1) A representation of environment, its contents
2) Locating/orienting yourself in representation
3) Operators applications on the representation
?
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Locative sensors

• Requires instrumentation of environment
• GPS works OK outdoors badly indoors
• Indoors Haris Crickets (based on RF,US)

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Status and plans

• Prototype software compass on 5th floor
• Reports users location and bearing in floor
  coords.
• Eventually instrument LCS/AI, Stata, etc.
• Make crickets self-calibrating attach to
  resources
• Seamlessly extend GPS coordinates indoors

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Location-based Computing
1) A representation of environment, its contents
2) Locating/orienting yourself in representation
3) Operators applications on the representation
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Classes of operators, applications

• Resource location
• Resource activation
• Resource embedding
• Resource optimization

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Resource location

• Requires instrumenting resources (once)
• Also, binding of sensor ID/IP to resource ID/IP
• Example applications
• Lead (visitor) to my office
• Lead (me) to a colleagues office
• Lead (group) to a talk about to start
• Spool my color printout where did it end up
• (Morning) wheres an empty parking spot
• (Evening) wheres my (_at_! car?

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Resource activation

• Requires actuating resources
• Example applications
• Open the parking garage gate upon approach
• (On my way in) unlock door, turn on lights
• (On my way out) vice-versa
• Call the elevator for approaching way-finder
• Call up my desktop on nearest wall
• Post notices of upcoming talks on active signage

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Resource embedding

• Requires sensors throughout environment
• Example applications
• Stream video/audio talks to online locations
• Find me a free conference room
• How long is the line at the trucks?
• What was the duty cycle of conference room X?
• Coupled with user-specified models
• Archiving what was LCS second floor like
  pre-renovations?what did Baker X look like in
  1999?

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Resource optimization

• Requires modeling and simulation
• Example applications
• Where should crickets be placed installation,
  failure reporting, etc.
• How quickly will a fire spread in building? and
  how long will it take to evacuate?
• Fastest route walking from 32-203 to 3-270?
  with no stairs, fewest elevators, ramps, etc.?

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Conclusions

• End-to-end description of LBC
• Capture, location sensing, application efforts
• Specific data, sensors of use to Oxygen project
• Suggested a host of example applications

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