Measuring Tall Trees

(HD ratio is the height of tree in feet divided by cbh in feet - Usually in these discussions only trees greater than 100 feet are being considered, but that is not a requirement for the statistic)
H/D Ratio Record in MTSF
Cook Forest/MTSF Comparisons April 2004
Mohawk Trails SF Forest Summit III (HD 1:150) Oct 2005
Tree Bowdowns/ H-D ratios April 2006

Tree Form Analysis

Tree Form Analysis Jan 2005
Form Class Nov 2006

Age/Tree Rings

University of Arkansas Tree Ring Laboratory http://www.uark.edu/misc/dendro/ The Tree-Ring Laboratory (TRL) was established in 1979 and concentrates on the development of exactly-dated annual tree-ring chronologies from ancient forests worldwide. These tree-ring chronologies are based on small non-destructive core samples taken from living trees, and cross-sections cut from dead logs. Tree-ring chronologies provide unique archives of environmental history, and have important applications to climatology, ecology, hydrology, seismology, archaeology, and history.

Tree Age Overestimates Sept 2007
Coring krummholz May 2007
Dendrochronology Projects Oct 2006
Eastern OLDLIST http://people.eku.edu/pedersonn/oldlisteast/
Coring Trees Sept 2006
Bursting the Age Bubble Sept 2006
Tree Cookie Preservation Nov 2005
False Rings and Missing Rings Nov 2005
International Tree Ring Database http://www.ncdc.noaa.gov/paleo/treering.html
Tree Rings Oct 2002
Laboratory Tree Ring Counts Dec 2003
Excessive Incremental Boring Oct 2003
Longevity Oct 2003
Confirmed Ages for Eastern Trees Oct 2003
Hemlock Ages Oct 2002
Speleothem Rings Oct 2003
Determining Age of Street Trees April 2004
Tree Rings: Questions for Neil May 2004
Pond Cypress Age April 2004
Core Data versus Stand Age July 2005
Hemlock Ages in Pennsylvania July 2005
Oldest Oaks and Wye Oak, MD Sept 2005
Ancient Cedars in Wisconsin Dec 2005

Limbs

Limb Volume Oct 2005
Trunks, Limbs and Branches Oct 2005, Dec 2005
Modeling Trunk Limb Structure Dec 2005

Tree Top Offset / Lean

Tree Top Offset / Lean Sept 2005
Look Park, Florence, MA - crown displacement Experiments Feb 2006

Live Crown Ratio

Live Crown Ratio Jan 2004

Databases

Tree ID Numbers April, Oct 2006
Spreadsheet Format For Tree Data March 2008

Mapping and GPS Location

Tree Census June 2007
GIS Mapping March 2004
Historic Map Site at UNH April 2005
Terrain Shape Index May 2005
GPS Info table Nov 2003
GPS Opinions March 2004
Map Coordinates and Conversions June 2006
Variable Map Scale conversion template June 2006

Multistemmed Trees

Measuring Multistemmed Trees Nov 2004
Multitrunked Trees Dec 2004, Jan 2005
Single and Multi-trunked Trees July 2007

Forest Structure:

Modeling

What can we learn from our numbers Oct 2002
Distributions and Benchmarking Sept 2002
Continuous Forest Inventory June 2004
Smaller Pines, Better Modeling Nov 2005
Taper Analysis Nov 2007
Putting Big Trees in Context Dec 2007
Old Growth Hemlock Modeling Nov 2007

Tree Formulas

American Forests Big Tree Formula: Before nominating a tree, you need to know 3 measurements: (1) Trunk Circumference (measured in inches), (2) Vertical Tree Height (measured to the nearest foot), and (3) Average Crown Spread (measured to the nearest foot). American Forests uses the following calculation to determine a tree's total points: Trunk Circumference (inches) + Height (feet) + ¼ Average Crown Spread (feet) = Total Points. http://www.americanforests.org/resources/bigtrees/measure.php
ENTS Big Tree points Jan 2005

Size Distribution Analysis

Mohawk Trail State Forest Black Cherries March 2004
Cook Forest State Park Black Cherries March 2004

Sites

Site Definition & Hierarchy Sept 2004
Eastern Forest Structure Nov 2004

Philosophy

Our Compulsion July 2003
Tree Measuring Methods/A Rap On The Knuckles Nov 2003
Dendromorphometry Book April 2006

History

The 150 Club - Pre-ENTS measurements

Ideas To Be Pursued

Colby Rucker:

Rule of 73- Correcting the girth measurement for breast height (July 2003)
Measuring Tree Heights by the Pole Method (August 2003)
Measuring Trunk Diameters with a Laser Rangefinder (August 2003)
Taming the Wrap on the Bushnell Rangefinder (August 2003)
Total Volume Estimates (Oct 2003)

Instrumentation

Head Tilt- Swivel April/May 2008
TrPulse 360 testing Nov 2007
Trupulse Tests Oct - Nov 2007
Trupulse 360 Horizontal Angle Measurer Oct 2007
TruPulse versus TruPulse Oct 2007
Equipment Calibration Sept 2007
Trupulse 360 and Macroscope 45 Sept 2007
Calibration of Clinometers May 2007
Laser Testing May 2007
Nikon Prostaff 440 Laser Rangefinder Nov 2006
Truely the True Pulse Oct 2006
True Pulse 200/Striped Maple Sept 2006
Trupule 200 preliminary tests Sept 2006
NASA aids in search for woodpecker thoguht to be extinct Aug 2, 2006
Using Satellite Data to Find Old-Growth June 2006
Maximum Measurement Errors March 2006
Macroscope 25 vs RD 1000 Feb 2006
Shigometery at Cook Forest, PA Jan 2006
Laser Testing Jan 2006
Reticle/Monocular Testing Report Jan 2006
Laser Rangefinder Calibration Dec 2005
Clinometer Calibration Dec 2005
Clinometer/Level Accuracy and Testing Sept 2005
Instrument Calibration Nov 2003
Laser Rangefinders Nov 2004
RD 1000 Relescope/Densiometer - Tree Volume Measurements Index

Photography

Earthworm Sampling

Earthworm Sampling Nov 2006

How to Measure a Big Tree Slide Show (2002)

How to measure a big tree (2002)

Slide 1: Measuring height using a laser rangefinder and clinometer
Slide 2: Measuring height using the principle of similar triangles
Slide 3: Measuring the circumference of a tree
Slide 4: Measuring the crown spread of a tree
Slide 5: To calculate the Champion Tree Points using the American Forests Formula

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