Putting Location into LocationBased Computing Seth Teller GraphicsLCS

1
Putting Location into Location-Based
ComputingSeth TellerGraphics/LCS
2
What is location-based computing?

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

3
Location-based computing requires

• 1) A representation of environment, its contents

2) Locating/orienting yourself in representation
3) Operators applications on the representation
4
Location-based computing

• 1) A representation of environment, its contents

2) Locating/orienting yourself in representation
3) Operators applications on the representation
5
Capturing architectural spaces

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

6
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

7
Initial 2D floorplan
Layers exterior/interior walls text
icons Physical plant has economic incentive to
maintain
8
Analyze for spaces, room labels, etc.
Now have offices, corridors, interstitial spaces
c
9
Extrude to 3D
Doorjambs, raised floors, dropped ceilings, c.
10
Add vertically connecting elements
Stairs, elevators, airshafts, ducting etc.
11
Add procedural lights, furnishings
Override locally with per-user schema or specifics
12
Generating architectural spaces procedurally

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

13
Status and Plans

• Extrude exterior basemap using building heights

14
Status and Plans

• Extrude every floor of every building at MIT

15
Location-based Computing
1) A representation of environment, its contents
2) Locating/orienting yourself in representation
3) Operators applications on the representation
?
16
Locative sensors

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

17
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

18
Location-based Computing
1) A representation of environment, its contents
2) Locating/orienting yourself in representation
3) Operators applications on the representation
19
Classes of operators, applications

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

20
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?

21
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

22
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?

23
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.?

24
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

25
(No Transcript)