Vegetation Red Edge Spectral Feature Depth Percent Calculator
Actual red-edge two-band reflectance contrast normalized by explicitly chosen long-side band. Signed inverted edge retained; not universal feature-depth convention, vegetation identity or detection of life.
Description
A reflectance edge compares signals on the two sides of a spectral feature.
A reflectance edge compares signals on the two sides of a spectral feature.1
Contrast relative to the long-wavelength side is a measurement convention rather than proof of vegetation. Use this tool to calculate the stated observation or conditional model from supplied measurements.
When to use Vegetation Red Edge Spectral Feature Depth Percent Calculator
Use this tool to calculate the stated observation or conditional model from supplied measurements. Establish the observation or experimental context, reference/calibration source, unit basis and adopted model assumptions.
How to use Vegetation Red Edge Spectral Feature Depth Percent Calculator and understand its results
- Establish the observation or experimental context, reference/calibration source, unit basis and adopted model assumptions.
- Enter independentlyMeasuredShortSideReflectance, independentlyMeasuredLongSideReflectance, using the field meanings and rules below, then run the tool.
- Read result.observedLongRelativeEdgeContrastPercent. Interpret each field using the units, signs and evidence rules below.
- If input validation fails, correct the reported field and run again. Before applying a successful result, check the stated reference scope, units, assumptions and any retained unknown evidence.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| independentlyMeasuredShortSideReflectance | Independently measured short side reflectance | number | Required |
| independentlyMeasuredLongSideReflectance | Independently measured long side reflectance | number | Required |
Require both reflectances in inclusive 0–1 and positive long-side reflectance. Return 100×(long−short)/long. Negative contrast is allowed when the short side exceeds the long side; no biological-source or significance threshold is inferred.
longRelativeContrastPercent=100×(longReflectance−shortReflectance)/longReflectance Apply the field units and exact ordering, boundary and evidence rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Structured result containing the calculation or selected reference fields below | object |
| result.observedLongRelativeEdgeContrastPercent | Observed Long Relative Edge Contrast Percent; use the units, sign convention and calculation stated above | number |
{
"input": {
"independentlyMeasuredShortSideReflectance": 0.2,
"independentlyMeasuredLongSideReflectance": 0.4
},
"output": {
"result": {
"observedLongRelativeEdgeContrastPercent": 50
}
}
}Limitations and assumptions
Contrast relative to the long-wavelength side is a measurement convention rather than proof of vegetation. Results depend on the independently established measurement basis and the exact model assumptions above.
Every listed input requires an explicit value. Unexpected fields, incorrect value types, nonfinite numbers and sparse numeric arrays fail validation; tool-specific bounds and alignment rules apply as described above. Extremely large inputs or outputs can also be rejected. An input error is distinct from a successful calculation that reports a false comparison or retains unknown evidence.
Alternative or Complementary methods
Use Chlorophyll Analog Wavelength Peak Shift Estimator Calculator to examine a related aspect: A sampled spectrum may have several wavelengths tied for its largest response.
Use Photosynthesis Photon Flux Red Edge Viability Checker where its separate inputs and scope apply: Usable photon flux depends on wavelength and the adopted photosynthetic response.
References
Similar or alternative tools
- Chlorophyll Analog Wavelength Peak Shift Estimator Calculator
A sampled spectrum may have several wavelengths tied for its largest response.
- Photosynthesis Photon Flux Red Edge Viability Checker
Usable photon flux depends on wavelength and the adopted photosynthetic response.