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Assessing Street Tree Populations with iTree Tools. STRATUM prior to data collection . Goals / Setting expectations Data fields to support goals Resources Conducting inventory Paid staff? Contractors? Volunteers? Technology Sampling

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stratum prior to data collection
STRATUM prior to data collection
  • Goals / Setting expectations
    • Data fields to support goals
  • Resources
    • Conducting inventory
      • Paid staff?
      • Contractors?
      • Volunteers?
    • Technology
  • Sampling
    • How much GIS savvy and software/hardware is necessary?
    • Interaction between GIS and iTree software
    • Using the random plot generator
know the client and client s needs
Know the client and client’s needs
  • Identify the client
  • Identify the assignment
  • STRATUM has a LOT of reporting options; providing all may not be helpful
    • What does the client want to know?
    • What else did you find out that may be of interest or value?
know the client and client s needs4
Know the client and client’s needs
  • Examples of clients and needs
    • Client: Mayor
      • Assignment: Quantification of ecosystem services
    • Client: City forestry department
      • Assignment: Report on present tree condition and maintenance needs
    • Client: NGO
      • Assignment: Report on stocking levels and enhancement opportunities for planting projects
  • What you report on should be based on your client and their needs (!)
data needs
Data needs
  • Existing data?
    • Run on-hand data through STRATUM
  • Sample inventory to be collected?
  • Full inventory to be collected?
  • Define species list
    • Full list is very long; you will save time of you truncate to expected species
custom configuration7
Custom configuration
  • Customize existing data collection tools
  • Create new (Add Other 1, 2, 3 question)
process issues
Process issues
  • Will data be collected on PDAs or paper?
  • Is there any stratification (management zones)?
    • NOTE: You cannot stratify random sample by management zones; you can sub-sample each management zone or post-stratify in to management zones
costs and benefits
Costs and benefits
  • Benefits data comes pre-loaded
    • Local info is available from source such as http://www.psc.state.md.us/psc/gas/gasCommodity.htm
  • Program costs may be obtained from local managers
logistics
Logistics
  • Who will conduct?
    • Contractors
      • Spec it right and let ‘em run
    • Volunteers
      • Stay tuned for next talk
    • Paid staff
      • Most control if it is a luxury you can afford
        • Go to assignment; is buy-in (community volunteers) an objective)?
logistics cont
Logistics (cont.)
  • Are you a local?
    • Likely for volunteers
    • You will know where to park, where it is safe, etc.
  • Are you not local?
    • Likely for contractors and possibly for paid staff
    • Will need to know where to park, does it cost, how much…
    • Will need to address safety concerns in your protocols
tools
Tools
  • Biltmore
    • Quick DBH; safety measure
  • If ecollect
    • PDA
      • Extra styli! They are easy to drop
    • GPS
  • If hard copy collect
    • Paper
    • Pencil
notification
Notification
  • Regardless of who performs, recommend that you carry some form of identification associated with your project
  • Carrying a “this is who we are, what we are doing, and why” letter for distribution to curious citizens is recommended
tech savvy
Tech savvy
  • How much do you need?
    • Probably impossible to do with none
    • Difficult to do with some
    • If you have a lot (GIS, GPS, Access, Excel), you can get a great deal of flexibility and do more than the “standard issue”
do you need gps
Do you need GPS?
  • NO
    • iTREE does not presently have a GPS component
    • There is a spatial component that is not required, but lat-long must be entered manually
    • Specific locations would likely provide little value
is there a benefit to gps
Is there a benefit to GPS?
  • Yes
    • I used to track pending and completed segments in the field.
using the random plot generator
Using the random plot generator
  • Install the random plot generator per the iTREE manual
  • You will end up with a “Random Select Roads” tool on your toolbar
sample size how big
Sample size – how big?
  • Sample inventories are generally a 3-6% sample of total street segments
  • General guidelines for sample sizes in communities based on human populations:
    • For communities with less than 50,000 persons, sample size is 6% of total street miles
    • For communities between 50,000 and 150,000 persons, sample size is 5%
    • For communities between 150,000 to 250,000 persons, sample size is 4%
    • For communities over 250,000 persons, sample size is 3%
stratum prior to data collection maryland department of natural resources
STRATUM prior to data collection

Maryland Department of Natural Resources