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Ecology Tools

Specialized calculators for ecological measurements.

Overview

Ecology Tools provide specialized calculators commonly needed in ecological fieldwork. These tools help you collect standardized measurements efficiently.

Random Number Generator

Generate random numbers for sampling and plot selection.

Features

  • Custom range (min/max)
  • Multiple number generation
  • Random coordinate pairs
  • Save history

Applications

  • Random plot selection
  • Transect starting points
  • Sampling intervals
  • Random individual selection

How to Use

  1. Set minimum value
  2. Set maximum value
  3. Tap Generate
  4. Record or save result

Tree Height Calculator

Estimate tree height using angle and distance method.

Method

Uses trigonometry:

Height = Distance × tan(Angle to top) + Observer height

How to Use

  1. Stand at measured distance from tree
  2. Measure distance to trunk
  3. Sight along phone edge to tree top
  4. Device measures angle automatically
  5. Height calculated instantly

Tips for Accuracy

  • Use tripod for stable readings
  • Measure distance precisely
  • Ensure line of sight to top
  • Account for sloping ground

Accuracy

  • Typically ±5-10% with practice
  • Better on flat ground
  • Verify with multiple readings

DBH Calculator

Convert circumference to Diameter at Breast Height.

Features

  • Circumference to DBH conversion
  • Standard 1.3m height reference
  • Basal area calculation
  • History of measurements

How to Use

  1. Measure circumference at 1.3m height
  2. Enter value in centimeters
  3. DBH and basal area calculated
  4. Save to observation

Formula

DBH = Circumference / π
Basal Area = π × (DBH/2)²

Special Cases

  • Forked trees: Measure below fork
  • Leaning trees: Measure on uphill side
  • Buttressed trees: Measure above buttress

Canopy Cover Estimator

Estimate canopy cover percentage using your camera.

Method

Digital densiometer - analyzes camera image to estimate cover.

How to Use

  1. Point camera straight up
  2. Frame canopy in viewfinder
  3. Capture image
  4. Algorithm estimates cover %

Best Practices

  • Take multiple readings per plot
  • Avoid direct sunlight
  • Use consistent height
  • Note sky conditions

Alternative: Visual Estimation

Use reference images to estimate:

  • 0-20%: Open
  • 21-40%: Sparse
  • 41-60%: Moderate
  • 61-80%: Dense
  • 81-100%: Closed