Table of contents
Citation for this website:
Swiecki, T. J., Bernhardt, E. A. Guidelines for Developing and Evaluating
Tree Ordinances. Phytosphere Research, Vacaville, CA. http://phytosphere.com/treeord/index.htm. Accessed: (Access date)
- Sampling from populations
- Statistical bias
- Random sampling and random numbers
- Stratified sampling
- Sample size
- Links to sample size calculators
- Photogrammetry and remote sensing techniques
- Uses
- Materials needed
- Notes
- Sampling considerations for photogrammetry
- Estimating tree canopy cover from aerial images
- Visual (ocular) method for estimating canopy cover
- Dot grid method of canopy estimation
- Line intercept or transect method
- Digital image analysis methods
- Other resources
- Ground survey
- Uses
- Materials needed
- Notes
- Sampling considerations for ground surveys
- The windshield survey
- Evaluation example: Windshield survey for tree topping incidence
- The foot survey
- Tree size
- Tree condition/health
- Proximity to infrastructure and hardscape damage
- Rating scales
- Photo points
- Uses
- Materials needed
- Notes
- Ground level photo point
- Aerial photo points
- Record keeping and analysis
- Uses
- Materials needed
- Notes
- Geographic Information Systems (GIS)
- Evaluation example: Creating a forest/tree GIS
- Tree inventory systems
- Additional resources
- Evaluation example: Street tree inventory as part of a citywide
GIS
- Evaluation example: Street tree management
- Inventorying regulated private trees
- Public polling
- Uses
- Materials needed
- Notes
- Interviews
- Self-completed questionnaires
- Survey design considerations
- Sampling considerations for public polling
- Evaluation example: Homeowner attitudes toward trees
Special Topics:
- General
- Dot grid estimation
- Public Polling
