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GPS Communication Software GPS GPS Mapping Program Tarpits and Tips Tools of the Trade Garmin GPS III Plus Tools of the Trade - Part I GPS - The Big Picture Discuss GPS Accuracy Review of GPS Receiver Types Why the Garmin GPS III Plus? Summary GPS - The Big Picture

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tools of the trade

GPS CommunicationSoftware

GPS

GPS

Mapping Program

Tarpits and Tips

Tools of the Trade
tools of the trade part i

Garmin

GPS III Plus

Tools of the Trade - Part I
  • GPS - The Big Picture
  • Discuss GPS Accuracy
  • Review of GPS Receiver Types
  • Why the Garmin GPS III Plus?
  • Summary
gps the big picture
GPS - The Big Picture
  • GPS and Fire Applications
  • GPS and Navigation
  • GPS and Digital Data Collection
  • GPS and Burned Area Rehab (BAER)
gps the big picture4
GPS - The Big Picture
  • Depending on size of fire, GPS will play a critical role in...
    • Marking location
    • Updating fire perimeter
    • Mapping fire effects
    • Mapping resources at risk
    • Data depicted in IAP next morning
unique aspects of fire mapping

Scale

  • Mode of Collection
  • Environment

25 acres

10 mile perim.

  • Quantity of Units
  • Technical Skill Levels
Unique Aspects of Fire Mapping
overview
Overview
  • GPS - The Big Picture
  • Discuss GPS Accuracy
  • Review of GPS Receiver Types
  • Why the Garmin GPS III Plus?
  • Summary
how accurate is gps

With SA

Without SA

Total Stand-Alone Horizontal Accuracy – 95%

246 ft

(75 m)

74 ft

(22.5 m)

How Accurate is GPS?
  • Specifications from Dept. of Defense

*Dave Turner, UN/USA GNSS Workshop, April 2002

http://www.oosa.unvienna.org/SAP/act2002/gnss1/

presentations/session01/speaker01/

accuracy comparisons

Garmin

50%

(CEP)

95%

(2dRMS)

12XL

14.4 ft (4.4m)

32.5 ft (9.9m)

III Plus

11.1 ft (3.4 m)

24.6 ft (7.5 m)

eTrex

9 ft (2.7 m)

22 ft (6.7 m)

III Plus

11.1 ft (3.4 m)

24.6 ft (7.5 m)

Accuracy Comparisons

*David L. Wilson's GPS Accuracy Web Page

http://users.erols.com/dlwilson/gps.htm

overview10
Overview
  • GPS - The Big Picture
  • Discuss GPS Accuracy
  • Review of GPS Receiver Types
  • Why the Garmin GPS III Plus?
  • Summary
review of gps receiver types

Consumer Grade

    • Navigation, Basic Mapping, Fun
Review of GPS Receiver Types
review of gps receiver types12
Review of GPS Receiver Types
  • Mapping/GIS Grade
    • GIS Features and Attributes
review of gps receiver types13

Survey Grade

    • Boundaries, Precise Control Networks, Vertical Measurements
Review of GPS Receiver Types
decision factors for the fire gps tool
Decision Factors for the Fire GPS Tool
  • Accuracy
  • Cost (hardware)
  • Nerd Factor Scale
  • Miscellaneous Factors
    • Storage
    • Strategy
survey grade
Survey Grade
  • Accuracy: mm - decimeter
  • Costs: forgettaboutit
  • Nerd Factor:
  • Storage: weeks worth of data
  • Strategy: network adjustments
  • Lots of equipment
mapping gis grade

NERD

Mapping/GIS Grade
  • Accuracy: 1meter - 5meter
  • Costs: $10,000 - $3,000
  • Nerd Factor:
  • Storage: days worth of data
  • Strategy: GIS update
  • Misc...:
    • post-process software
consumer grade
Consumer Grade
  • Accuracy: 3meter - 7meter
  • Costs: $1500 - $150
  • Nerd Factor:
  • Storage: hours worth of data
  • Strategy: waypoints, simple lines
  • Misc....
    • handheld, moving map display
consumer grade gps wins
Consumer Grade GPS Wins!
  • Reasonable accuracy for mapping large things
  • Low receiver cost
  • Low nerd scale
  • Strategy set to enhance navigation capabilities
  • Low attribution requirements
overview19
Overview
  • The Big Picture
  • Discuss GPS Accuracy
  • GPS by Receiver Types
  • Why the Garmin GPS III Plus?
  • Summary
consumer grade gps
Consumer Grade GPS
  • Consumer Grade Manufacturers
  • Garmin
    • Recognized World Leader
    • High Support

Lowrance

Garmin

Magellan

garmin gps iii plus
Garmin GPS III Plus
  • $299
  • 12 Channel GPS Receiver
  • 1.4 MB of Map memory*
  • 20-30 hours of battery life

*Purchase of MapSource TOPO CD + $99

garmin iii plus

Other Models (e.g. eTrex)

    • No time/date in comment field
    • No external antenna
    • No averaging
Garmin III Plus
  • Unique Aspects
    • Antenna (Quadrifilar Helix)
    • Form factor for placement on a dash
    • Averages waypoints
garmin iii plus limitations
Garmin III Plus Limitations
  • Less accurate than other models
  • Less map and track memory than other models
  • Missing other features:
    • Digital Compass
    • Altimeter
summary
Summary
  • GPS and Fire
  • Consumer grade GPS satisfies...
    • accuracy
    • costs
  • Garmin III Plus - preferred model for this class
what s in store
What’s in Store
  • Use the Garmin III Plus
  • Use the Garmin III Plus often
  • Tomorrow - next in the series:
    • GPS Communication Software