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Published byGertrude McDonald Modified over 9 years ago
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Tools of the Trade GPS Communication Software GPS Mapping ProgramTarpits and Tips GPS
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GPS - The Big Picture Discuss GPS Accuracy Review of GPS Receiver Types Why the Garmin GPS III Plus? Summary Tools of the Trade - Part I Garmin GPS III Plus
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GPS and Fire Applications GPS and Navigation GPS and Digital Data Collection GPS and Burned Area Rehab (BAER) GPS - The Big Picture
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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
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Fire Incident Plans Cycle GPS Field Work GIS Data Transfer
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Unique Aspects of Fire Mapping 25 acres 10 mile perim. Scale Environment Mode of Collection Quantity of Units Technical Skill Levels
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GPS - The Big Picture Discuss GPS Accuracy Review of GPS Receiver Types Why the Garmin GPS III Plus? Summary Overview
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How Accurate is GPS? *Dave Turner, UN/USA GNSS Workshop, April 2002 http://www.oosa.unvienna.org/SAP/act2002/gnss1/ presentations/session01/speaker01/ Specifications from Dept. of Defense 74 ft (22.5 m) 246 ft (75 m) Total Stand-Alone Horizontal Accuracy – 95% Without SAWith SA
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Accuracy Comparisons *David L. Wilson's GPS Accuracy Web Page http://users.erols.com/dlwilson/gps.htm 22 ft (6.7 m)9 ft (2.7 m)eTrex 24.6 ft (7.5 m)11.1 ft (3.4 m)III Plus 32.5 ft (9.9m)14.4 ft (4.4m)12XL 95% (2dRMS) 50% (CEP) Garmin 24.6 ft (7.5 m)11.1 ft (3.4 m)III Plus
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GPS - The Big Picture Discuss GPS Accuracy Review of GPS Receiver Types Why the Garmin GPS III Plus? Summary Overview
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Review of GPS Receiver Types Consumer Grade –Navigation, Basic Mapping, Fun
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Review of GPS Receiver Types Mapping/GIS Grade –GIS Features and Attributes
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Review of GPS Receiver Types Survey Grade –Boundaries, Precise Control Networks, Vertical Measurements
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Decision Factors for the Fire GPS Tool Accuracy Cost (hardware) Nerd Factor Scale Miscellaneous Factors –Storage –Strategy
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Survey Grade Accuracy: mm - decimeter Costs: forgettaboutit Nerd Factor: Storage: weeks worth of data Strategy: network adjustments Lots of equipment
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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 NERD
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Consumer Grade Accuracy: 3meter - 7meter Costs: $1500 - $150 Nerd Factor: Storage: hours worth of data Strategy: waypoints, simple lines Misc.... –handheld, moving map display
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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
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The Big Picture Discuss GPS Accuracy GPS by Receiver Types Why the Garmin GPS III Plus? Summary Overview
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Consumer Grade GPS Consumer Grade Manufacturers Garmin –Recognized World Leader –High Support
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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
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Garmin III Plus Unique Aspects –Antenna (Quadrifilar Helix) –Form factor for placement on a dash –Averages waypoints Other Models (e.g. eTrex) –No time/date in comment field –No external antenna –No averaging
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Garmin III Plus Limitations Less accurate than other models Less map and track memory than other models Missing other features: –Digital Compass –Altimeter
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GPS and Fire Consumer grade GPS satisfies... –accuracy –costs Garmin III Plus - preferred model for this class Summary
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Use the Garmin III Plus Use the Garmin III Plus often Tomorrow - next in the series: –GPS Communication Software What’s in Store
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