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STRATUM Data Collection and Analysis: Baltimore

This document summarizes Baltimore's 2007 Sample Survey conducted by TreeBaltimore and other partners, focusing on the assessment of urban trees. The survey involved random selection of 500 sample blocks, logistical organization, and extensive volunteer training. Key phases included planning, training, data collection, and quality assurance checks. It highlights effective strategies, challenges faced, and valuable lessons learned, emphasizing the importance of thorough pre-planning, volunteer engagement, and data management for successful urban forestry initiatives.

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STRATUM Data Collection and Analysis: Baltimore

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  1. STRATUM Data Collection and Analysis: Baltimore

  2. Baltimore’s 2007 Sample Survey • Background • TreeBaltimore • Why a survey? • Why a sample? • Why iTree?

  3. Baltimore’s 2007 Sample Survey • Partners & Division of Labor • Baltimore City Department of Recreation & Parks (TreeBaltimore & Forestry) • Training & equipment • Baltimore City Department of Planning • Technical, data review, QA/QC • Parks & People Foundation • Volunteer management & project logistics

  4. Baltimore’s 2007 Sample Survey • Timeline • Planning began in April • Training occurred in June • Surveying occurred throughout July • QA/QC began mid-way through surveying and is wrapping up now

  5. Baltimore’s 2007 Sample Survey • Survey Structure • Random selection of 500 sample blocks • PDA vs. Paper • Paper option served as a backup • Using in concert with a GPS in the field • No benefit when sampling

  6. Baltimore’s 2007 Sample Survey • Logistical Structure • City divided into five sections • Volunteers put in groups of two or three • Partners changed frequently • Schedules produced on a weekly basis • Parks & People office was the hub for volunteer check in and out

  7. Working With Volunteers • Pools of interested volunteers • Utilized contact and distribution lists of all partners • Expectations and time commitments • Volunteer expertise • Tree Identification • PDAs • Knowledge of Baltimore streets

  8. Working With Volunteers • Training • Four hour training prior to surveying • Some additions/revisions added • Could have had more extensive mentoring during beginning of survey period • Volunteer support materials

  9. Analysis • Data Quality • As function of training • QA/QC during and after data collection • Inputting data into STRATUM

  10. Lessons Learned • Things you won’t find in the manual • Logistics • Weather concerns • Safety • iTree database setup

  11. Lessons Learned • Lessons Learned • The danger of the two sided dbh tape • Spend more time on design & planning • Be in touch w/volunteers in the field • Start QA/QC early • No need for dividing city into sections • Better tracking of block assignments for QA/QC • Pre-testing, pre-testing, pre-testing

  12. Helpful Hints • Some helpful tips • T-shirts – good to have something to identify surveyors • Equip surveyors with info about project • Prioritize what information needs to be collected • Plan to complete more surveying than needed • Thank your volunteers!

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