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Tree Inventory PDA Utilities: An Introduction Data Collection Two options: Paper forms Pocket PC Paper-based Inventory UFORE, STRATUM, MCTI, SDAP Final analysis & reporting depends on quality field data Manual data entry into i-Tree Database Format Paper Advantages Low up-front cost

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Presentation Transcript
data collection
Data Collection
  • Two options:
    • Paper forms
  • Pocket PC
paper based inventory
Paper-based Inventory
    • Final analysis & reporting depends on quality field data
paper advantages
Paper Advantages
  • Low up-front cost
  • No technical training
  • No batteries
  • Paper doesn’t break when you drop it
paper disadvantages
Paper Disadvantages
  • Error-prone
    • Decipherment
    • QA harder
  • Can be slower in field
  • Much slower in office
pda based inventory utilities
PDA-based Inventory Utilities
  • Created keeping in mind users who have little familiarity with field data collection
  • For project managers who want to minimize time-consuming data entry, QA/QC and database formatting
pda based inventory
PDA-based Inventory
  • Application compatible
    • Push button data transfer
  • Two Interfaces
    • Desktop
    • Pocket PC
PDA to Desktop

Data Transfer


PDA to Desktop

Data Transfer


PDA to Desktop

Data Transfer


pda advantages
PDA Advantages
  • Fast data collection
  • Low error rate
  • No data entry required
  • Data transfer automated
pda disadvantages
PDA Disadvantages
  • Up-front equipment expense
  • Training required
  • Require maintenance/care
    • Charging batteries
  • Units not protected from elements
    • Water, Dust, etc.
  • Desktop Configuration
  • PDA synchronization
  • Using the PDA Utility
choosing a pda
Choosing a PDA
  • Compatible only with Pocket PCs
    • Alternative OS (Palm, BlackBerry, Psion, PocketLinux, etc.) are not compatible.
    • Windows Mobile 2002 or 2003 operating systems (OS).
    • Mobile 5.0 operating systems
  • Other considerations
    • Weatherized models
    • Back-up media slot
    • Protective slip covers or carrying cases
    • High capacity batteries
    • Cost ($200-400 or more)
In-Field QA/QC
  • Hot Check – one team member or someone dedicated to QA/QC checks 3% of ongoing data collection
  • Cold Check – data re-measured by the QA/QC specialist, who meets with and compares data with the team
  • Blind Check – a sample unit is re-measured by another team or QA/QC specialist. Data is compared, but without the presence of the initial team.
data transfer qa qc
  • Set up a system for nightly transfer that works for your volunteers or project
  • Scan the data for errors each night
  • Reset and import from next PDA